JP2000325848A - Fountain equipment - Google Patents

Abstract

(57) [Problem] To improve reliability by eliminating wasteful consumption of energy, simplifying the structure, and lowering the incidence of failure. Further, there is provided a fountain device capable of suppressing a load variation of a fountain water supply pump and avoiding adverse effects on a fountain water supply pump and a motor driving the fountain water supply pump. SOLUTION: A plurality of fountain nozzles 4, 4... Are separately branched to a water pipe 2 connected to a discharge port of a fountain water supply pump 1 through a plurality of fountain control valves 3, 3. The water pipe 2
Is provided with a pressure accumulator 7 for absorbing pressure fluctuations in the water pipe 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention eliminates the use of a relief valve for preventing water hammer and a flow control valve for controlling the height of a fountain, thereby eliminating wasteful consumption of energy and simplifying the structure. The present invention relates to a fountain device capable of suppressing load fluctuations of a fountain water supply pump and avoiding adverse effects on a fountain water supply pump and a prime mover that drives the fountain water supply pump.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, a water supply pump 1 for fountain, a water pipe 2 connected to a discharge port of the pump 1, and a plurality of fountain control valves 3, 3. A plurality of fountain nozzles 4, 4 ... branched off from the water pipe 2, and a plurality of fountain control valves 3, 3 ... provided on a flow control valve 3A provided on the water pipe 2 side and a fountain nozzle 4 side. A relief valve 5 which is constituted by an on-off valve 3B comprising an electromagnetic valve or an air valve which can be opened and closed at a high speed, and which is always opened at an appropriate position in the water pipe 2 or when the on-off valve 3B is closed in conjunction with the on-off valve 3B. A fountain device having a structure in which an escape passage 6 provided with a branch is branched is well known.

According to this fountain device, a plurality of fountain control valves 3 and 3 are maintained while the operation of the fountain water supply pump 1 is continued.
By appropriately controlling the opening degree of the flow control valve 3A and the opening / closing of the opening / closing valve 3B in..., The state of the fountain spouting from the fountain nozzles 4, 4,. A fountain can be performed to produce a large visual change. Further, a sharper fountain can be executed by increasing the opening / closing speed of the opening / closing valve 3B and rapidly opening / closing it. Furthermore, the occurrence of water hammer, which is a concern when the on-off valve 3B is rapidly closed, is prevented by drainage from the relief passage 6 provided with the relief valve 5, and the fountain water supply pump 1, the water pipe 2, the plurality of fountains Control valves 3, 3 ...
And a plurality of fountain nozzles 4, 4,...

However, in the conventional fountain device, since the water is drained from the escape passage 6 provided with the escape valve 5, wasteful consumption of energy occurs and the escape valve 5 and the escape passage 6 are required. And the necessity of the flow control valve 3A for controlling the fountain height complicates the structure. For this reason, the failure rate increases and the reliability decreases. In addition, the load of the fountain water supply pump 1 varies greatly during execution of the fountain with various changes in appearance, which adversely affects the fountain water supply pump 1 and a motor (not shown) that drives the fountain water supply pump 1 and the like. Problem.

[0005]

That is, in the above-mentioned conventional fountain device, energy is wasted, and the structure is complicated, so that the occurrence rate of failures is increased and the reliability is reduced. There is a problem that the load fluctuation of the supply pump is large, which adversely affects the fountain water supply pump and a motor that drives the fountain water supply pump.

Accordingly, the present invention eliminates the use of a relief valve for preventing water hammer and a flow control valve for controlling the fountain height, thereby eliminating wasteful consumption of energy.
The simplification of the structure to reduce the failure rate increases reliability, and at the same time, suppresses the load fluctuation of the fountain water supply pump, thereby reducing the load on the fountain water supply pump and the prime mover that drives the fountain water supply pump. It is an object of the present invention to provide a fountain device capable of avoiding adverse effects.

[0007]

To achieve the above object, a fountain device according to the present invention comprises a fountain water supply pump.
, And a plurality of fountain nozzles 4, 4... Branched from the water pipe 2 through a plurality of fountain control valves 3, 3. In the fountain device, the water pipe 2 is provided with a pressure accumulator 7 for absorbing pressure fluctuations in the water pipe 2.

According to the present invention, a large pressure fluctuation in the water flow pipe when the fountain control valve is rapidly closed can be absorbed by the pressure accumulator to prevent the occurrence of water hammer, and the pressure accumulator can be prevented. The fountain height can be controlled by adjusting the pressure balance. For this reason, the conventionally required relief valve becomes unnecessary. Further, the load fluctuation of the fountain water supply pump can be suppressed by the pressure fluctuation absorbing action of the pressure accumulator. Further, when the amount of water used changes by changing the fountain execution amount of the fountain nozzle, the partial pressure of the fountain water supply pump fluctuates with the change in the amount of water used, and the action of changing the fountain height occurs. Such an effect can be minimized by the pressure absorbing function of the pressure accumulator. For this reason, the fluctuation of the fountain height due to the change in the amount of water used is suppressed, and even if the fountain execution quantity of the fountain nozzle changes, the fountain with the predetermined fountain height is executed, and the effect of the fountain effect is improved. I can give it.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram of a fountain device according to the present invention. Note that the same or corresponding parts as those in the conventional example of FIG. In FIG. 1, the fountain device is branched from the water pipe 2 separately through a fountain water supply pump 1, a water pipe 2 connected to a discharge port of the pump 1, and a plurality of fountain control valves 3, 3,. Are provided, and the plurality of fountain control valves 3, 3,... Are constituted by electromagnetic valves or air valves that can be opened and closed at high speed.

The water pipe 2 is provided with a pressure accumulator 7 for absorbing pressure fluctuations in the water pipe 2. The accumulator 7 is composed of an accumulator, and the lower part thereof has an outlet on the upstream side 2A and an inlet on the downstream side 2B of the water pipe 2 facing the same. The upper part communicates with an air compressor 9 via a compressed air supply pipe 8. Therefore, when the inside of the pressure accumulator 7 is sent to the upper air chamber in the pressure accumulator 7 by the air compressor 9, the pressure in the upper air chamber and the operation of the fountain water supply pump 1 are sent to the lower water chamber in the pressure accumulator 7. The water pressure is kept in equilibrium. Note that nitrogen gas may be sealed in the upper part of the pressure accumulator 7 from a nitrogen gas cylinder instead of compressed air and air. Further, the upper air chamber and the lower water chamber in the pressure accumulator 7 may be separated by a diaphragm made of an elastic material such as rubber, or the entire pressure accumulator 7 may be formed of an elastic material such as rubber.

Next, the operation of the above configuration will be described.
By appropriately controlling the opening and closing of the plurality of fountain control valves 3, 3,... While the operation of the fountain water supply pump 1 is continued, based on a control signal output from a controller (not shown),
By changing the state of the fountain jetting from the fountain nozzles 4, 4,... In various ways, a sharp fountain with a large dynamic change can be executed, and a large visual change can be produced. Further, a sharper fountain can be executed by increasing the opening / closing speed of the opening / closing valve 3B and rapidly opening / closing it.

On the other hand, a large pressure fluctuation in the water pipe 2 when the fountain control valves 3, 3... Are rapidly closed can be absorbed by the pressure accumulator 7 to prevent the occurrence of water hammer. The fountain height can be controlled by adjusting the balance between the pressure of the upper air chamber and the pressure of the lower water chamber of the accumulator 7. For this reason, the flow regulating valve 3A, the relief valve 5, and the relief passage 6, which are required in the conventional fountain device shown in FIG. 2, are not required.

That is, when the fountain control valves 3, 3... Are rapidly closed, large pressure fluctuations in the water pipe 2 eliminate the use of the relief valve 5 and the relief passage 6, and the pressure accumulator 7
By absorbing water, the occurrence of water hammer can be prevented, so that wasteful consumption of energy (wasteful drainage) is eliminated. In addition, the use of the flow control valve 3A is omitted, the fountain height can be controlled by adjusting the balance between the pressure of the upper air chamber and the pressure of the lower water chamber of the accumulator 7, and the relief valve 5 and By omitting the use of the escape passage 6, the structure can be simplified, the occurrence rate of failures can be reduced, and the reliability can be improved. Further, the pressure fluctuation absorbing action of the pressure accumulator 7 suppresses the load fluctuation of the fountain water supply pump 1 and adversely affects the fountain water supply pump 1 and a motor (not shown) for driving the fountain water supply pump 1. Can be avoided.

On the other hand, when the state where the fountain is executed by the large number of fountain nozzles 4, 4... Is switched to the state where the fountain is executed by the small number of the fountain nozzles 4, 4,. Although the action of increasing the fountain height by increasing the partial pressure of the fountain water supply pump 1 occurs, such an action can be suppressed as small as possible by the pressure absorbing function of the pressure accumulator 7. For this reason, even if the fountain is switched to the fountain state by a small number of fountain nozzles 4, 4,... The effect of the fountain can be improved. That is, when the used water amount changes by changing the fountain execution amount of the fountain nozzle 4,
Although the partial pressure of the fountain water supply pump 1 fluctuates with a change in the amount of water used, an action of changing the fountain height occurs. However, such an action is minimized by the pressure absorbing function of the pressure accumulator 7. Can be. For this reason, the fluctuation of the fountain height due to the change of the used water amount is suppressed, and even if the fountain execution quantity of the fountain nozzle 4 changes, the fountain with the predetermined fountain height is executed, and the effect of the fountain effect Can be given.

[0015]

As described above, the present invention provides a water supply pump for fountain, a water pipe connected to the discharge port of the pump, and a branch from the water pipe separately through a plurality of fountain control valves. In the fountain device having a plurality of fountain nozzles, a pressure accumulator that absorbs pressure fluctuations in the water pipe is provided in the water pipe. Pressure fluctuations can be absorbed by the pressure accumulator and the occurrence of water hammer can be prevented, so that wasteful consumption of energy (wasteful drainage) is eliminated. In addition, by adjusting the pressure balance of the pressure accumulator, the height of the fountain can be controlled without using the flow control valve, which was conventionally required, and the use of the relief valve, which is conventionally required, By omitting
Since the structure can be simplified, the failure rate is reduced,
Reliability can be improved. Further, by the pressure fluctuation absorbing action of the pressure accumulator, the load fluctuation of the fountain water supply pump can be suppressed to prevent the fountain water supply pump and the prime mover that drives the fountain water supply pump from being adversely affected. Regardless of the change in the fountain execution quantity of the nozzle, execute the fountain with the predetermined fountain height,
The effect of the fountain can be improved.

[Brief description of the drawings]

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

FIG. 2 is a system diagram showing an example of a conventional fountain device.

[Explanation of symbols]

 Reference Signs List 1 water supply pump for fountain 2 water pipe 3 fountain control valve 4 fountain nozzle 7 accumulator

Claims (1)

[Claims] 1. A fountain comprising: a fountain water supply pump; a water pipe connected to a discharge port of the pump; and a plurality of fountain nozzles each separately branched from the water pipe via a plurality of fountain control valves. A fountain device, wherein the water pipe is provided with a pressure accumulator for absorbing pressure fluctuations in the water pipe.