JP2899852B2 - Fountain quick shut-off device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fountain rapid shut-off device for sharply cutting off a fountain with a sharply cut end just beside.

[0002]

2. Description of the Related Art A conventional fountain shutoff device is, for example, shown in FIG.
As shown in FIG. 1, a water passage pipe 3 connecting a pump 1 and a fountain nozzle 2 is provided with a water passage control valve 4 composed of an electromagnetic valve or an electric valve. In this type of fountain cutoff device, the pump 1 is operated with the water flow control valve 4 opened, and in the fountain state in which water is jetted from the fountain nozzle 2, the fountain is closed by closing the water flow control valve 4. Will be shut off.

[0003] When an electrically operated valve is used as the water flow control valve 4, rapid shutoff cannot be performed. Therefore, with the motor-operated valve, it is not possible to execute a crisp fountain cutoff in which the end of the fountain is sharply cut right beside. on the other hand,
When an electromagnetic valve is used as the water flow control valve 4, rapid shutoff can be performed, so that the end of the fountain is sharply cut right besides and the crisp fountain shutoff is performed, thereby producing the effect of the fountain. I can give it. Therefore, conventionally, a fountain quick shutoff device has been configured by interposing a water flow control valve 4 composed of an electromagnetic valve in a water flow pipe 3 connecting the pump 1 and the fountain nozzle 2.

On the other hand, in a fountain device for performing a large flow rate fountain, a water pipe 3 having a large diameter is naturally used. However, although a large-diameter electric valve that can be interposed in the large-diameter water pipe 3 is commercially available, a large-diameter solenoid valve that can be interposed in the large-diameter water pipe 3 is not commercially available. Therefore, when the fountain quick shut-off device is configured by interposing the water flow control valve 4 composed of an electromagnetic valve as in the related art, the diameter of the water flow pipe 3 in which the electromagnetic valve can be installed is limited, and a large flow rate is set. It has a disadvantage that it cannot be applied to a fountain device that performs a fountain. Therefore, regardless of the diameter of the water pipe 3, there is a demand for the development of a fountain quick shut-off device capable of executing a crisp quick shut-off in which the end of the fountain is sharply cut right beside.

[0005]

The problem to be solved is that the diameter of the water pipe 3 in which the solenoid valve can be installed is limited,
This is not applicable to fountains that perform large flow fountains.

[0006]

According to the present invention, a water flow control valve is provided in a water flow pipe connecting a pump and a fountain nozzle, and a reflux control valve is provided from the water flow pipe between the water flow control valve and the pump. The return pipe is branched and connected, and a non-return valve that allows only forward flow is interposed in the water pipe between the water control valve and the fountain nozzle, and a high pressure is provided between the check valve and the fountain nozzle. A high-pressure air supply system with an air supply control valve interposed is connected, and the purpose is to execute a crisp rapid cut-off with the end of the fountain sharply cut right besides regardless of the diameter of the water pipe. Achieved.

[0007]

According to the present invention, normal fountains can be performed by opening the water flow control valve and operating the pump with the reflux control valve and the high pressure air supply control valve closed. In this normal fountain state, the water discharge control valve 4 is closed and the return control valve is opened, so that the water discharged from the pon is likely to return to the water source through the return pipe. If the high-pressure air supply control valve is opened immediately thereafter, high-pressure air is rapidly supplied from the high-pressure air supply system to the water pipe between the check valve and the fountain nozzle, and the water pipe between the check valve and the fountain nozzle is suddenly supplied. And high air pressure is applied to the water remaining in the fountain nozzle. As a result, the residual water is rapidly pushed out from the fountain nozzle, and air is ejected from the fountain nozzle following the completion of the pushing of the residual water. Therefore, visually, it is possible to produce a crisp rapid cutoff in which the end of the fountain is sharply cut right beside. Also, by using an electric valve as the water flow control valve, it is possible to execute a crisp rapid cut-off in which the end of the fountain is sharply cut right besides regardless of the diameter of the water flow pipe.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a piping diagram showing one embodiment of the present invention. The same or corresponding parts as those of the conventional example are denoted by the same reference numerals and described. In FIG. 1, a water flow control valve 4 composed of a motor-operated valve is interposed in a water flow pipe 3 connecting the pump 1 and the fountain nozzle 2, and the water flow control valve 4 is provided between the water flow control valve 4 and the pump 1 by a motor-operated valve. A return pipe 6 provided with a return control valve 5 is connected in a branched manner, and a check valve 7 allowing only forward flow is provided in the water flow pipe 3 between the water flow control valve 4 and the fountain nozzle 2, This check valve 7 faces the spare chamber 8.
A pressurized tank 9 is provided at the base of the fountain nozzle 2,
The pressurized tank 9 and the preliminary chamber 8 communicate with each other.

On the other hand, a high-pressure air supply system 11 having a high-pressure air supply control valve 10 formed by an electromagnetic valve is connected to the spare chamber 8. The high-pressure air supply system 11 includes a high-pressure air supply source (air compressor) 11A, a throttle mechanism 11B, an air tank 11C, a high-pressure air supply control valve 10, and a check valve 11D that allows only forward flow from the upstream side to the downstream side. An air tank 11C is provided with a ventilation pipe 11E interposed in series.
When the high-pressure air supply control valve 10 is opened and the air expands to the total volume of the preliminary chamber 8 and the ventilation pipe 11E, the preliminary chamber before opening the high-pressure air supply control valve 10 It is set so that a value higher than the pressure P3 in 8 can be maintained.

In the above configuration, a normal fountain can be performed by operating the pump 1 with the flow control valve 4 opened and the recirculation control valve 5 and the high-pressure air supply control valve 10 closed. That is, the high-pressure water discharged from the pump 1 is jetted from the fountain nozzle 2 via the preliminary chamber 8 and the pressurized tank 9. In this normal fountain state, the high pressure air supply source 11A of the high pressure air supply system 11 is operated, and the high pressure is stored in the air tank 11C. At this time, the pressure P3 in the preliminary chamber 8 and the pressure in the pressurized tank 9 are substantially equal, and the pressure in the air tank 11C is equal to the pressure P3 in the preliminary chamber 8.
Set to a higher value.

During the normal fountain, the air flow control valve 4 and the recirculation control valve 5 are opened and closed almost simultaneously. That is, the air flow control valve 4 is operated in the closing direction, and at the same time, the recirculation control valve 5 is operated in the opening direction. As a result, the water discharged from the pon 1 tends to return to the water source 12 through the return pipe 6. On the other hand, the high-pressure air supply control valve 10 is opened at a timing slightly delayed from the start of the opening and closing operation of the air flow control valve 4 and the recirculation control valve 5. Thereby, the air tank 1
The high-pressure air stored in 1C enters the preliminary chamber 8, and the check valve 7 is rapidly closed by the pressure difference between the air pressure and the water pressure at this time. As described above, by rapidly closing the check valve 7, high air pressure is applied to the water remaining in the pressurized tank 9 and the fountain nozzle 2. As a result, the water in the pressurized tank 9 and the fountain nozzle 2 is rapidly pushed out from the fountain nozzle 2 to perform fountain, and the air is ejected from the fountain nozzle 2 following the completion of the pushing of the water. Therefore, visually, the end of the fountain produces a crisp, rapid cut that is sharply cut right beside it,
It is possible to prevent a decrease in the injection distance and enhance the effect. The high-pressure air supplied from the high-pressure air supply source 11A is stored in the air tank 11C via the throttle mechanism 11B, and the stored high-pressure air is stored in the high-pressure air supply control valve 10A.
By opening the valve, the chamber can be quickly shut off by using the small-capacity high-pressure air supply source 11A.

In the above embodiment, the spare chamber 8 is provided upstream of the pressurized tank 9 and the outlet of the ventilation pipe 11E is connected to the spare chamber 8. It is not limited only to the configuration described in the embodiment,
As shown in FIG. 2, an auxiliary chamber 8 may be provided adjacent to the downstream side of the pressurized tank 9, and the outlet of the ventilation pipe 11 </ b> E may be connected to the auxiliary chamber 8. Even with such a configuration, the same operation and effect as in the above embodiment can be obtained.

[0013]

As described above, according to the present invention, the high-pressure air shuts off the water flow, pushes the residual water from the fountain nozzle rapidly to the outside, and after the completion of the extrusion of the residual water, releases the air from the fountain nozzle. Because I squirt,
Visually, it is possible to produce a crisp rapid cut-off in which the end of the fountain is sharply cut right beside. Also, by using an electric valve as the water flow control valve, it is possible to execute a crisp rapid cut-off in which the end of the fountain is sharply cut right besides regardless of the diameter of the water flow pipe.

[Brief description of the drawings]

FIG. 1 is a piping system diagram showing one embodiment of the present invention.

FIG. 2 is a partial piping diagram of a modification.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump 2 Fountain nozzle 3 Water flow pipe 4 Electric valve (water flow control valve) 5 Electric valve (reflux control valve) 6 Reflux pipe 7 Check valve 10 High pressure air supply control valve 11 High pressure air supply system

Claims (1)

(57) [Claims] 1. A water flow control valve is provided in a water flow pipe connecting a pump and a fountain nozzle, and a water return pipe provided with a reflux control valve is branched and connected from the water flow pipe between the water flow control valve and the pump. A check valve that allows only forward flow is provided in the water pipe between the water control valve and the fountain nozzle, and a high-pressure air supply control valve is provided between the check valve and the fountain nozzle. A fountain quick shut-off device characterized by being connected to a high-pressure air supply system.