JPH0596215A - Intermittent type fountain device - Google Patents

Abstract

PURPOSE:To intermittently spout clear-cut rodlike water lump whose termination is sharply cut just beside from a fountain nozzle hole 17 and also to change the height of fountain by a simple constitution without changing the bore diameter of the fountain nozzle hole 17. CONSTITUTION:The inside of a fountain nozzle 14 having a fountain nozzle hole 17 is comparted into both a first pressure chamber 15 and a second pressure chamber 16 wherein an outlet 18 is opened to the first pressure chamber 15. High-pressure water decompressed by a pressure reducing means 21 is supplied to the first pressure chamber 15 by control of an intermittent fountain control valve 20 and spouted from the nozzle hole 17. Moreover, high-pressure water having pressure higher than the high-pressure water supplied to the first pressure chamber 15 is supplied to the second pressure chamber 16. A piston 33 is advanced and moved. The nozzle hole 17 is closed by the piston 23 in the termination of the moving stroke of the piston 23 and fountain is instantly stopped. Thereafter, the piston 23 is returned by gravity by pressure relief action of a pressure relief part 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermittent fountain device for intermittently performing fountains to enhance the show effect of the fountains and to attract attention.

[0002]

2. Description of the Related Art Conventionally, as an intermittent fountain device for performing intermittent fountain, for example, one shown in FIG. 4 has been known. This intermittent fountain device has a pump 2 that constitutes a fountain system 1.
The structure is such that an intermittent fountain control valve 5 made of a magnet valve is provided in the middle of a fountain pipe 4 connecting the discharge port 2A and the inlet 3A of the fountain nozzle 3. In this intermittent fountain device, depending on the open / close time interval of the intermittent fountain control valve 5, a rod-shaped water mass having a length proportional to the open / close time interval is used for the fountain nozzle 3.
Since it can be ejected intermittently from the water, it enhances the show-like effect of the fountain compared to a simple continuous fountain, and arouses topicality. However, in the pilot type underwater solenoid valve used as the intermittent fountain control valve 5, it takes 0.2 to 0.3 seconds from the fully opened state to the fully closed state. In other words, 0.2 to 0.
For 3 seconds, water continues to flow even though the passage cross section of the valve is reduced, so that the end portion of the rod-shaped water mass ejected intermittently from the fountain nozzle 3 is 0.2 to 0.3 seconds. The diameter of the water was gradually reduced in a taper shape by the amount corresponding to the jet length of the water, and it was not possible to realize a sharp water fountain in which the end of the rod-shaped water mass was sharply cut right beside.

An intermittent type water fountain device shown in FIG. 5 is also known. In this intermittent fountain device, a cylinder 6 is attached to a fountain pipe 4 connected to a discharge port 2A of a pump 2 constituting a fountain system 1, a fountain nozzle 3 is provided at an outlet of the cylinder 6, and a cylinder 6 is provided. A piston 7 having a small hole 7a penetrating in the axial direction is housed inside, and an intermittent fountain control valve 5 made of a magnet valve is provided in the fountain pipe 4 to intervene. In this intermittent fountain device, the intermittent fountain control valve 5 is opened and high-pressure water is sent from the pump 2 into the cylinder 6 to push up the piston 7 and the water in the cylinder 6 existing above the piston 7 is sprayed. It is ejected from the nozzle 3 as a rod-shaped water mass. When the intermittent fountain control valve 5 is closed when the piston 7 reaches the top dead center, the water in the cylinder 6 existing in the lower part of the piston 7 moves to the upper part of the piston 7 through the small hole 7a. Therefore, the piston 7 descends to the stroke start end by its own weight and prepares for the next fountain. Therefore, in accordance with the opening / closing cycle of the intermittent fountain control valve 5, a rod-shaped water mass having a predetermined length and outer diameter set by the diameter of the fountain nozzle 3 and the internal volume of the cylinder above the piston 7 at the bottom dead center is sprayed. It can be ejected intermittently from the nozzle 3. However, in this type of intermittent fountain device, since the piston 7 is pushed up by the discharge pressure of the pump 2, the water in the cylinder 6 existing above the piston 7 is ejected from the fountain nozzle 3. Even if the height of the fountain is changed without changing the diameter of the fountain nozzle 3, the pressure obtained by the rise of the piston 7 is limited and the height of the fountain cannot be increased.

[0004]

The problem to be solved is that it is impossible to realize a sharp water fountain in which the end of a rod-shaped water mass ejected intermittently from a fountain nozzle is sharply cut right next to it. The point is that even if the fountain height is changed without changing the diameter of the fountain nozzle, the pressure obtained by the rise of the piston is limited and the fountain height cannot be increased.

[0005]

According to the present invention, a first fountain pipe of a fountain system having an intermittent fountain control valve interposed is connected to an inlet of a first pressure chamber of a fountain nozzle, and an outlet is provided to the first pressure chamber. A second pressure chamber opened to face the fountain nozzle hole communicating with the first pressure chamber, and the second pressure chamber accommodates a piston that closes the fountain nozzle hole at the end of the stroke. The second fountain pipe of the fountain system is connected to the inlet of the second pressure chamber, and the pressure of the high-pressure water supplied from the second fountain pipe to the second pressure chamber is the first pressure from the first fountain pipe. The pressure is set to be higher than the pressure of the high-pressure water supplied to the chamber, and a pressure relief portion is provided in either the second fountain pipe or the second pressure chamber.

[0006]

According to the present invention, high-pressure water is supplied from the first fountain pipe to the first pressure chamber by controlling the intermittent fountain control valve,
When high-pressure water is supplied from the fountain pipe to the second pressure chamber,
The high pressure water supplied to the pressure chamber is vigorously ejected from the fountain nozzle hole. The piston located at the beginning of the stroke is
The high pressure water supplied to the second pressure chamber and the high pressure water supplied to the first pressure chamber move forward (increase). When the piston advances and reaches the end of the stroke, the piston blocks the fountain nozzle hole, and the ejection of high-pressure water is instantly completed. Therefore, it is possible to realize a sharp fountain in which the end of the rod-shaped water mass is sharply cut right beside. Further, by adjusting the pressure of the high-pressure water supplied from the first fountain pipe to the first pressure chamber to change the pressure difference between the high-pressure water and the second pressure chamber, the height of the fountain nozzle hole can be changed without changing the diameter of the fountain nozzle hole. And the fountain time can be changed, and the fountain time can be changed by changing the start position of the piston. When the ejection of the rod-shaped water mass is completed, the intermittent fountain control valve is closed. Water flows out from the pressure relief portion, and the pressure in the second pressure chamber decreases, and the piston descends due to its own weight and returns to the start position. Therefore, at a time interval corresponding to the control cycle of the intermittent fountain control valve, a rod-shaped water having a predetermined length set by the pressure difference between the first pressure chamber and the second pressure chamber or the start position of the piston. The lump can be ejected from the fountain nozzle in a crisp and intermittent manner.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the fountain system 10 of the intermittent fountain device is
It is composed of a pump 11, a first fountain pipe 12 connected to a discharge port 11A of the pump 11, a second fountain pipe 13 branched from the first fountain pipe 12, and a fountain nozzle 14. The interior of the fountain nozzle 14 is divided into a first pressure chamber 15 and a cylindrical second pressure chamber 16, and the fountain nozzle hole 1 is provided at the center of the ceiling of the first pressure chamber 15.
7 is provided, the second pressure chamber 16 is provided concentrically with the fountain nozzle hole 17, and the outlet 18 thereof is opened to the first pressure chamber 15. The first fountain pipe 12 is connected to the inlet 19 of the first pressure chamber 15, and is provided with an intermittent fountain control valve 20 and a pressure reducing means 21 including a pressure reducing valve in order from the upstream side. The second fountain pipe 13 is branched from an intermediate position between the intermittent fountain control valve 20 and the pressure reducing means 21 in the first fountain pipe 12 and connected to the inlet 22 of the second pressure chamber 16. The second pressure chamber 16 reciprocates with a stroke amount from a stroke start end shown by a two-dot chain line to a stroke end shown by a one-dot chain line, and a piston 23 that closes the fountain nozzle hole 17 at the stroke end. Is housed. Further, the pressure relief portion 2 formed of a pressure relief valve is provided in the second fountain pipe 13.
4, a valve opening signal and a valve closing signal are output from the controller 25 to the opening / closing exciting coil of the pressure relief portion 24 and the opening / closing exciting coil of the intermittent water fountain control valve 20, respectively. There is. The outlet 1 of the second pressure chamber 16
The axial dimension h2 of the piston 23 is set larger than the dimension h1 from 8 to the fountain nozzle hole 17.

With such a structure, when the pressure relief portion 24 is closed and the intermittent fountain control valve 20 is opened by the control signal from the controller 25, the pressure is reduced from the first fountain pipe 12 by the pressure reducing means 21. High-pressure water is supplied to the first pressure chamber 15, and at the same time, from the second fountain pipe 13 to the second pressure chamber 1.
Water having a higher pressure than the high-pressure water supplied to the first pressure chamber 15 is supplied to 6. The high pressure water supplied to the first pressure chamber 15 is vigorously ejected from the fountain nozzle hole 17,
The height of the fountain can be increased. The second part is formed on the lower surface of the piston 23 located at the stroke start end indicated by the chain double-dashed line.
The high-pressure water supplied from the fountain pipe 13 to the second pressure chamber 16 is loaded, and the first fountain pipe 12 is provided on the upper surface of the piston 23.
The high pressure water supplied to the first pressure chamber 15 from is loaded.
Since the pressure of the high-pressure water supplied to the second pressure chamber 16 is higher than the pressure of the high-pressure water supplied to the first pressure chamber 15, the piston 23 uses the high-pressure water supplied to both pressure chambers 15 and 16. It moves forward (increases) by the differential pressure of. When the piston 23 moves forward, passes through the position indicated by the solid line, and reaches the end of the stroke indicated by the alternate long and short dash line, the tip of the piston 23 closes the fountain nozzle hole 17, and the ejection of high-pressure water is instantly completed. Therefore, it is possible to realize a sharp fountain in which the end of the rod-shaped water mass is sharply cut right beside. Further, according to the present invention, the pressure of the high pressure water supplied from the first fountain pipe 12 to the first pressure chamber 15 is adjusted by the pressure reducing means 21,
By varying the differential pressure with the second pressure chamber 16, the fountain height and the fountain time can be changed without changing the diameter of the fountain nozzle hole 17. Further, as shown in FIG. 2, the piston 23 is held by the holding member 26 inserted in the second pressure chamber 16, and the stroke starting end position, that is, the start position is changed to reduce the stroke amount. Can shorten the fountain time.

When the ejection of the rod-shaped water mass is completed, the intermittent water jet control valve 20 is closed and the pressure relief portion 24 is opened, so that the pressure in the second pressure chamber 16 is reduced and the piston 23 is self-weighted. It descends and returns to the start position. Therefore, at a time interval according to the control cycle of the intermittent fountain control valve 20, a predetermined pressure set by the differential pressure between the first pressure chamber 15 and the second pressure chamber 16 or the start position of the piston 23 is set. It is possible to eject the stick-shaped water mass that has been ejected from the fountain nozzle in a sharp and intermittent manner. Therefore, it becomes possible to enhance the show-like effect of the fountain and to raise the topicality.

In the above-described embodiment, the pressure relief portion 9 is described as a pressure relief valve provided in the second fountain pipe 13, but instead of this, the inlet 2 of the second pressure chamber 16 is used.
It may be configured by a through hole 27 having a small passage cross section formed in the vicinity of 2. With this configuration, the second pressure chamber 16
Although the high pressure water inside flows out through the through hole 27,
Since the passage cross section is set to be small, it does not hinder the above-mentioned operation. Further, the pressure reducing means 21 may be constituted by an orifice instead of the pressure reducing valve. Further, as shown in FIG. 3, the fountain system 10 is provided with two pumps 11, 1.
1P, the first fountain pipe 12 connected to the discharge port 11A of the pump 11, the second fountain pipe 13 and the fountain nozzle 14 connected to the discharge port 11p of the pump 11P, and the first pressure chamber The first fountain pipe 12 is connected to the inlet 19 of the valve 15, the pressure reducing means 21 including the intermittent fountain control valve 20 and the flow rate adjusting valve is provided in this order from the upstream side, and the second fountain 22 is provided at the inlet 22 of the second pressure chamber 16. The fountain pipe 13 may be connected, and the intermittent fountain control valve 20 and the flow rate adjusting valve 28 may be provided in this order from the upstream side.

[0011]

As described above, according to the present invention, high-pressure water is supplied from the first fountain pipe to the first pressure chamber and is vigorously ejected from the fountain nozzle hole, so that the height of the fountain is increased. You can Further, the piston is advanced by the pressure difference of the high-pressure water supplied from the second fountain pipe to the second pressure chamber and the high-pressure water supplied to the first pressure chamber, and the fountain nozzle hole is closed to eject the high-pressure water. Since it is completed instantly, it is possible to realize a sharp fountain shape in which the end of the rod-shaped water mass is sharply cut right next to it. Furthermore, by adjusting the pressure of the high-pressure water supplied to the first pressure chamber and varying the differential pressure with the second pressure chamber, the diameter of the fountain nozzle hole is not changed.
The fountain height and fountain time can be changed, and the fountain time can also be changed by changing the start position of the piston, so the show effect of the fountain can be enhanced and the topicality can be aroused. ..

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an example of a stroke amount adjusting structure of a piston.

FIG. 3 is a configuration diagram showing another embodiment of the present invention.

FIG. 4 is a configuration diagram of a conventional example.

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

[Explanation of symbols]

 10 Fountain system 12 First fountain pipe 13 Second fountain pipe 14 Fountain nozzle 15 First pressure chamber 16 Second pressure chamber 17 Fountain nozzle hole 18 Second pressure chamber outlet 19 First pressure chamber inlet 20 Intermittent fountain control Valve 22 Inlet of second pressure chamber 23 Piston 24 Pressure relief valve (pressure relief part)

Claims (1)

[Claims] 1. A first fountain pipe of a fountain system having an intermittent fountain control valve interposed therein is connected to an inlet of the first pressure chamber of the fountain nozzle, and a second pressure chamber having an outlet opening to the first pressure chamber is provided. First
A piston that is provided so as to face the fountain nozzle hole communicating with the pressure chamber and that closes the fountain nozzle hole at the end of the stroke is accommodated in the second pressure chamber, and the fountain system is provided at the inlet of the second pressure chamber. The second fountain pipe is connected to this second
The pressure of the high-pressure water supplied from the fountain pipe to the second pressure chamber is set to be higher than the pressure of the high-pressure water supplied from the first fountain pipe to the first pressure chamber. Two
An intermittent fountain device characterized in that a pressure relief portion is provided in any of the pressure chambers.