JPH05123619A - Fountain device - Google Patents

Abstract

PURPOSE:To intermittently spout water at short time intervals and to relieve the limitation in the height direction of the fountain by shortening the time for restoring the pressure in a tank right after the valve opening operation of fountain control valves, thereby obtaining the sharp fountain which does not generate drooping in the initial period of the fountain and drastically shortening the time for refilling the water into the tank. CONSTITUTION:Fountain nozzles 2 and a pump 3 are communicated with each other by a water pass system 4 and an air pressure loading system 11 is branched and connected to the secondary side pipings 43 of the water pass system 4. The fountain control valves are interposed between the branched connection points P and the fountain nozzles 2. Check valves 10 are interposed in the secondary pipings 43 on the upstream side of the branched connection points P.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fountain device for performing a dynamic fountain by variously changing the fountain shape in accordance with music to produce a large visual change.

[0002]

2. Description of the Related Art Conventionally, for example, a dynamic fountain has been executed by changing the form of a fountain in accordance with music.
A fountain device shown in FIG. 3 is known as a fountain device capable of producing a large visual change. This fountain device
A plurality of fountain nozzles 20, 20, ..., a pump 21 for pumping the fountain water, and a water flow system 2 for supplying the fountain water pumped by the pump 21 to the fountain nozzles 20, 20 ,.
3, that is, the water in the fountain pond 22, the fountain nozzles 20, 20, ...
And a water flow system 23 for sending the water to. Water flow system 2
3 is the collecting pipe 23A, the discharge side of the pump 21 and the collecting pipe 23.
A plurality of fountain nozzles 20 and 2 each having a jet port projecting above the water surface of a fountain basin 22 and a primary side pipe 23B connecting with A
0 ... It is constituted by a plurality of secondary side pipes 23C connecting the respective inlets and the collecting pipe 23A, and the pump 2
1, a pump check valve 24 and a pump gate valve 25 near the discharge side of No. 1
Is installed in series, and a fountain control valve 26 formed of an underwater electromagnetic valve is installed in each of the plurality of secondary side pipes 23C.

According to this fountain device, each fountain control valve 26 is opened and closed by outputting an electric signal from the controller 27 to each fountain control valve 26 in accordance with music while the pump 21 is continuously operating. It When the fountain control valve 26 is operated in the "open" state, the water discharged from the pump 21 to the water flow system 23 is supplied to each of the fountains through the route of the primary side pipe 23B → the collecting pipe 23A → a plurality of secondary side pipes 23C. It is possible to stop the fountain when the fountain control valve 26 is operated in the “closed” state to cut off the path by being pumped to the nozzles 20, 20. Therefore, the fountain shape can be changed variously based on the transmission program of the control signal output to each fountain control valve 26, so that the dynamic fountain is executed,
It is possible to produce a large visual change.

By the way, in this type of fountain device (hereinafter referred to as the former fountain device), the fountain is operated only by the water pressure generated in the water in the water flow system 23 by the discharge pressure of the pump 21. It takes a long time to recover the pressure in the secondary side pipe 23C that has dropped immediately after the control valve 26 opens to a predetermined pressure value obtained by the discharge pressure of the pump 21, and a relatively long time required for this pressure recovery. Therefore, it becomes impossible to perform a sharp fountain with a predetermined pressure value. That is, in the former fountain device, due to the viscosity and inertia of water, as shown by the phantom line in FIG.
The time T1 required to recover the pressure in the secondary pipe 23C becomes longer. Therefore, the fountain is executed at a pressure lower than the predetermined pressure value for a time corresponding to T1, and the fountain in the meantime causes a "drip phenomenon" to improve the impression. It hinders execution.

On the other hand, similarly to the former fountain device, a fountain device (hereinafter referred to as the latter fountain device) that dynamically changes the fountain shape to execute a dynamic fountain and produces a large visual change. It has been proposed (JP-A-3-77666). This fountain device, as shown in FIG.
0 is provided with a plurality of fountain nozzles 31 (however, only one nozzle 31 is shown in FIG. 5), the fountain nozzle 31 and the T joint 33 are connected to each other by a pipe 32, and the T joint 3
One of the pipes 3 and the elbow 3
5 and a three-way solenoid valve 37 via a vertical pipe 36
The other end of the T-joint 33 is opened to the water through the check valve 38 and the strainer 39, and the air compressor 40 is connected to one port of the three-way solenoid valve 37 to connect the three-way valve. The other port of the solenoid valve 37 is open to the atmosphere.

According to this fountain device, before the start of the fountain,
Water W is filled in the inner area shown by the diagonal lines, and the three-way solenoid valve 37
The pipe 36 communicates with the atmosphere. From this state, when the pipe 36 is made to communicate with the air compressor 40 by the operation of the three-way solenoid valve 37, compressed air is sent into the pipe 36 and presses the water W in the pipe 34 as shown in FIG. The water is spouted from 31 and the fountain is executed.
When the pipe 36 is communicated with the atmosphere by the operation of the three-way solenoid valve 37, the check valve 38 is opened due to the water level difference (water head) from the water surface WL of the fountain pond 30 to the check valve 38, as shown in FIG. Water W on the T-joint 33, the pipe 32 and the pipe 34
, And refill with water W as shown in FIG. 5 with time to prepare for the next fountain. Therefore, since the fountain shape can be changed variously based on the transmission program of the control signal output to the three-way solenoid valve 37, it is possible to perform a dynamic fountain and produce a large visual change. become.

Moreover, since the water W is pressed and jetted by the pressure propagation accompanying the expansion of the compressed air pressure having a viscosity and inertia smaller than that of water, the responsiveness to the operation of the three-way solenoid valve 37 is improved. Therefore, it is possible to improve the impression level by executing a sharp fountain that does not cause the "sagging phenomenon" like the former fountain device. However, in the latter fountain device, the water W is filled in the internal region shown by the diagonal lines in FIG. 5 by opening the check valve 38 due to the water level difference from the water surface WL of the fountain pond 30 to the check valve 38. Therefore, since the water pressure difference is relatively small, the refilling time becomes long, which makes it impossible to execute the intermittent fountain at short time intervals. That is, there is a drawback that the change of the fountain shape is restricted in time. Further, since the execution of the fountain depends on the compressed air pressure all the time, the pressure under the fountain nozzle 31 is low and limited by the height of the fountain. That is, the height of the fountain is restricted to be lower than that of the former fountain device that performs the fountain due to the discharge pressure of the pump 21 shown in FIG. 3, and there is a drawback that the change in the form of the fountain is restricted in the height direction.

[0008]

The problem to be solved is that in the former fountain device, it takes time to recover the pressure in the secondary side pipe which is lowered by the opening of the fountain control valve, and the time required for the pressure recovery. This is because the fountain's "drip phenomenon" occurs for a minute, and it is not possible to execute a sharp fountain that improves the impression. In the latter fountain device, the refill time for replenishing water is long and the time interval is short. Since it is not possible to perform intermittent fountains at the point where the fountain shape changes due to time, and because the fountain execution depends on the compressed air pressure all the time, the pressure under the fountain nozzle is low and the fountain height is high. Is limited.

[0009]

SUMMARY OF THE INVENTION The present invention comprises at least one
In a fountain device provided with two fountain nozzles, a pump for pumping fountain water, and a water flow system for supplying the fountain water pumped by this pump to the fountain nozzle, a pneumatic load for applying compressed air pressure to the water flow system. The system is branched and connected, and a water flow control valve is provided in a water flow system between the branch connection position and the fountain nozzle, and a backflow prevention mechanism is provided in a water flow system upstream of the branch connection position. The pressure recovery time immediately after the opening of the fountain control valve is shortened, and a sharp fountain that does not cause "drip phenomenon" is performed to improve the impression and By continuously pumping water to the water flow system, the time required for refilling can be greatly shortened, intermittent fountains can be executed at short time intervals, and changes in the fountain shape are time constrained. And And achieve the purpose of avoiding such that fountain height is limited.

[0010]

According to the present invention, since the compressed air pressure of the pneumatic load system is applied to the water existing between the backflow prevention mechanism and the fountain control valve in the water flow system, when the fountain control valve is opened, Immediately after the valve is opened, the pressure propagation accompanying the expansion of the compressed air pressure, which has a viscosity and inertia smaller than that of water, can press the water existing between the backflow prevention mechanism and the fountain control valve to cause an initial fountain almost instantly. Therefore, immediately after the opening of the fountain control valve, the time for recovering the water flow system between the backflow prevention mechanism and the fountain control valve to a predetermined pressure value obtained by the discharge pressure of the pump is significantly shortened, and the "drip phenomenon" at the beginning of the fountain is reduced. Can be reliably prevented. On the other hand, by continuing the operation of the pump, water is pressure-fed to the water passage system on the downstream side of the backflow prevention mechanism continuously from the operation immediately after the opening of the fountain control valve described above,
The fountain can be sprayed at a predetermined pressure value without lowering the pressure of the water flow system downstream of the backflow prevention mechanism.
The fountain is stopped when the fountain control valve is closed. On the other hand,
Since water can be positively pumped to the water flow system by a pump,
It is possible to significantly reduce the time required to refill the water flow system after closing the fountain control valve, to enable intermittent fountain execution at short time intervals, and to increase the height of the fountain. it can.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram of the fountain device of the present invention. In this figure, the fountain device 1 includes a plurality of fountain nozzles 2, 2 ...
, A pump 3 for pumping the fountain water, and a water passage system 4 for supplying the fountain water pumped by the pump 3 to the fountain nozzles 2, 2 ,.
2 ... and a water flow system 4 for sending to. Water flow system 4
Is a collecting pipe 41, a primary-side pipe 42 that connects the discharge side of the pump 3 and the collecting pipe 41, a plurality of fountain nozzles 2, 2 ... And a plurality of secondary side pipes 43 connecting the collecting pipe 41 and
43. The pump check valve 6 and the pump sluice valve 7 are provided in series near the discharge side of the pump 3, and the fountain nozzles 2, 2 ... A fountain control valve 7 formed of an underwater electromagnetic valve is provided in the vicinity of. In addition, a plurality of secondary side pipes 43, 4
3 ... Directly downstream of each fountain control valve 7, a tank 9 having a capacity capable of securing a necessary amount of water for a single fountain described later or a follow-up delay time is provided, and a collecting pipe is provided upstream of this tank 9. Check valve 10 for preventing backflow of water to the 41 side
Is installed. The tank 9 can be omitted by arranging each of the secondary side pipes 43, 43 ... By itself so as to secure the amount of water required for the one-time fountain or the following delay time.

On the other hand, each secondary side pipe 4 in the water flow system 4
An air pressure load system 11 for applying compressed air pressure is branched and connected to each of 3, 43, .... Each secondary piping 4
The branch connection position P of the pneumatic load system 11 for 3, 43 ... Is set between the tank 9 and the check valve 10. The pneumatic load system 11 includes an air-compressor 11A and a compressed air supply pipe 11B that connects the air-compressor 11A and the branch connection position P to each other. The compressed air supply pipe 11B includes a diaphragm cylinder 11D. is there. The diaphragm cylinder 11D includes an air chamber G and a water chamber L partitioned by a diaphragm 11d made of an elastic member.
And the air chamber G communicates with the air-compressor 11,
The water chamber L communicates with the secondary pipe 43. In the figure,
Reference numeral 12 indicates a controller, for example, the controller 1 in accordance with music.
An electric signal is output from 2 to each fountain control valve 8, and the fountain control valve 8 is opened and closed.

Next, the operation of the above configuration will be described.
First, the pump 3 and the air-compressor 11 are operated. As a result, the water in the fountain basin 5 reaches the inlet of the fountain control valve 8 and the region of the compressed air supply pipe 11B of the pneumatic load system 11 on the downstream side of the diaphragm cylinder 11D and the water chamber L of the diaphragm cylinder 11D. The compressed air is filled therein, and is fed into the region of the compressed air supply pipe 11B of the pneumatic load system 11 on the upstream side of the diaphragm cylinder 11D and the air chamber G of the diaphragm cylinder 11D to maintain a pressure equilibrium state. On the other hand, each fountain control valve 8 is opened and closed by outputting an electric signal from the controller 12 to each fountain control valve 8 in accordance with music. Each secondary pipe 4 between the check valve 10 and the fountain control valve 8
3, 43 ... and water existing in the tank 9 (specifically, water existing in the compressed air supply pipe 11B of the pneumatic load system 11 on the downstream side of the diaphragm cylinder 11D and in the water chamber L of the diaphragm cylinder 11D). (Including water) is loaded with the compressed air pressure of the pneumatic load system 4 via the diaphragm 11d of the diaphragm cylinder 11D, so that if the fountain control valve 8 is operated in the "open" state, Immediately after the valve is opened, as shown in FIG. 2, the region of the compressed air supply pipe 11B of the pneumatic load system 11 on the downstream side of the diaphragm cylinder 11D due to the pressure propagation accompanying the expansion of the compressed air pressure having a viscosity and inertia smaller than that of water. And the water existing in the water chamber L of the diaphragm cylinder 11D and the two between the check valve 10 and the fountain control valve 8 in FIG. It can be initially fountain Fountain nozzle 2 substantially instantaneously by pressing the water present in the side pipes 43, 43 ...... and tank 9. Therefore, as shown by the solid line in FIG. 4, the water flow system 4 on the downstream side of the check valve 10
Time T2 for recovering the pressure in the tank 9, mainly in the tank 9, to a predetermined pressure value obtained by the discharge pressure of the pump 3.
However, compared with the former time T1 of the fountain device, it is significantly shortened. As a result, it is possible to surely prevent the "drip phenomenon" in the initial stage of the fountain and to execute a sharp fountain that improves the impression.

Further, following the operation immediately after the opening of the fountain control valve 8 in FIG.
The water can be pumped to the water flow system 4 on the further downstream side, and the fountain can be sprayed at a predetermined pressure value without lowering the pressure in this region. Further, by pumping water to the region on the downstream side of the check valve 10, the pressures of the water chamber L and the air chamber G of the diaphragm cylinder 11D of FIG.
1d elastically returns to the original state shown in FIG. By outputting an electric closing signal from the controller 12 to each fountain control valve 8,
The fountain control valve 8 is closed to stop the fountain. Since water is positively pumped to the water flow system 4 by the pump 3, the time required for refilling the water flow system 4 downstream of the check valve 10 with water after the fountain control valve 8 is closed. To allow the intermittent fountain to be executed in a short time interval. Therefore, it is possible to avoid the inconvenience that the change of the shape of the fountain is time-limited. Further, since the height of the fountain can be increased as compared with the latter latter fountain device of the related art, it is possible to avoid the inconvenience of being restricted in the height direction due to the change of the fountain shape.

In the above embodiment, the pneumatic load system 11
Diaphragm cylinder 11D to the compressed air supply pipe 11B of
However, the present invention can achieve the same effect as the above embodiment even if the use of the diaphragm cylinder 11D is omitted.

[0016]

As described above, the present invention shortens the time for pressure recovery during the opening operation of the fountain control valve,
A sharp fountain that does not cause the "dripping phenomenon" can be executed to improve the impression. Further, since the water is continuously pumped to the water flow system by the pump, the time required for refilling the water after the fountain can be significantly shortened.
Therefore, the intermittent fountain can be executed at short time intervals, so that the change of the fountain shape is not restricted in time. Further, since the height of the fountain can be increased, there is no restriction in the height direction due to the change of the fountain shape.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of a fountain device of the present invention.

FIG. 2 is an enlarged sectional view showing an operating state of a diaphragm cylinder.

FIG. 3 is a system diagram of a conventional example.

FIG. 4 is a graph showing a relationship between pressure and time after opening the fountain control valve.

FIG. 5 is a system diagram showing another conventional example.

FIG. 6 is a view showing a fountain state of FIG.

FIG. 7 is a diagram showing a water filling state of FIG. 5;

[Explanation of symbols]

 1 Fountain Device 2 Fountain Nozzle 3 Pump 4 Water Flow System 8 Fountain Control Valve 10 Check Valve (Backflow Prevention Mechanism) 11 Pneumatic Load System P Pneumatic Load System Branch Connection Position

Claims (1)

[Claims] 1. A fountain device comprising at least one fountain nozzle, a pump for pumping fountain water, and a water flow system for supplying the fountain water pumped by this pump to the fountain nozzle. An air pressure load system that applies compressed air pressure is branched and connected, and a water flow control valve is provided in a water flow system between the branch connection position and the fountain nozzle, and a water flow system upstream of the branch connection position is provided. A fountain device having a backflow prevention mechanism interposed.