JPH0771654B2 - Fountain - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fountain device.

[Prior Art] In a conventional fountain device of a type that ejects water from a nozzle's ejection port, if the ejection pressure of water is appropriately selected in relation to the submerged depth of the ejection port, the water will be ejected from the ejection port to the surrounding area. It is known that the fountain in the form of water is entrained to form a fountain that rises to a predetermined height.

[Problems to be Solved by the Invention] In such a fountain device, the shape of the fountain is sensitive to changes in the submerged depth of the nozzle outlet, so if the water level fluctuates irregularly, the shape of the fountain also changes. There was a problem that it became messy and it became difficult to control the shape of the fountain.

Therefore, the applicant of the present invention has previously made a cylindrical guide member 3 which is narrowed upward around the ejection port 2 of the nozzle 1 as shown in FIG.
We proposed a fountain device with a layout.

According to this fountain device, when the pressure water sent by the pump P is ejected from the ejection port 2 of the nozzle 1, the water surrounded by the guide member 3 and the water below the guide member 3 is ejected from the ejection port 2. The water fountain 5 was attracted to and accompanied by the water flow, forming a fountain 5 in a state in which the water rose from the water surface to a predetermined height. It was also confirmed by experiments that the appearance of the fountain 5 hardly changed even when the water level fluctuated and the submerged depth H of the spout 2 changed. In such a fountain device, the fountain in the above-mentioned form is formed not only when the nozzle outlet is immersed below the water surface but also when the nozzle outlet is slightly protruding from the water surface, the amount of protrusion is small. It

However, the fountain device as shown in Fig. 2 has the aspect that the shape of the fountain hardly changes even when the water level changes, which leads to the fixation of the shape and the poor variability of the fountain shape. ing. On the other hand, in recent amusement parks and various event venues, it is desired to freely change the form of the fountain and try various productions.

Under such circumstances, the present inventor has conducted diligent research and tried to consciously or artificially change the appearance of the water without being greatly affected by the water level change, and to complete the present invention. I arrived. In other words, in the fountain device of FIG. 1, the inventor has the same amount of water as the water flow that is drawn out from the jet port 2 of the nozzle 1 and is accompanied by the water flow passage surrounded by the guide member 3 or the jet port 2. There is a correlation with the passage area (hereinafter referred to as the area of the narrowed portion A. The narrowed portion A is not necessarily the smallest area inside the guide member 3) at substantially the same level, and the gas is discharged from the ejection port 2. When the water pressure and flow rate are the same, the throttle A
The fact that the shape of the fountain also changes according to the area of the narrowed portion A when the area of No. 1 changes is found, and the present invention has been made by paying attention to such fact.

That is, an object of the present invention is to provide a fountain device capable of forming a fountain in a form in which water rises from the surface of the water, but capable of consciously or artificially changing the form of the fountain. .

[Means for Solving the Problem] In the fountain device of the present invention, a cylindrical guide member that is narrowed upward is arranged around the ejection port of the nozzle that is submerged below the water surface. The member is configured to be capable of relative vertical movement.

[Operation] According to this configuration, the surrounding water, which is attracted by the water ejected from the ejection port of the nozzle and rises from the water surface together, is regulated by the guide member and is less susceptible to the water level H. Fluctuations are less likely to affect the appearance of the fountain.

In such a situation, when the nozzle and the guide member are moved up and down relatively, the area of the narrowed portion (that is, the upper narrowed portion) is formed because the guide member has a cylindrical shape that is narrowed in the upper narrowed shape. The passage area at the same or substantially the same level as the jet outlet of the nozzle in the water passage surrounded by the tubular guide member that is narrowed in a ball shape changes, and the state of the fountain also changes accordingly. In particular, in the present invention, since the guide member is formed in a cylindrical shape that is narrowed in the upper constriction shape, when water is ejected from the ejection port of the nozzle, the water flow passage surrounded by the guide member is filled with water. Not only is it easy to inflow, but the area of the throttle part also fluctuates significantly even if the vertical movement of the guide member relative to the nozzle is small, so the shape of the fountain will change significantly even if the movement width is not so large. Will be able to.

[Embodiment] FIG. 1 is an explanatory view of a fountain device according to an embodiment of the present invention. The fountain device shown in the figure has a guide member 3 arranged around a jet outlet 2 of a nozzle 1 which is placed in a state of being immersed under the water surface W, so that pressure water is sent to the nozzle 1 by a pump P. It has become. The guide member 3 has a tubular shape that is narrowed in an upper constriction shape, and a connecting frame 7 is attached to the guide member 3. The slide member 8 provided on the connecting frame 7 can move up and down with the nozzle 1 as a guide.

In such a fountain device, when the pressure water sent by the pump P is ejected from the ejection port 2 of the nozzle 1, the water surrounded by the guide member 3 and the water below the guide member 3 is ejected from the ejection port 2. The fountain 5 is formed in such a form that the water flow rises up to a predetermined height by being attracted to and accompanies the discharged water flow. Such a state of the fountain is formed by arranging the guide member 3 around the ejection port 2. Even if the water level fluctuates and the submerged depth H of the spout 2 changes, the shape of the fountain 5 is hardly affected.

FIG. 3 is an explanatory view showing the area variation of the throttle portion and the change of the state of the fountain when the guide member 3 is moved downward relative to the nozzle 1, and at the ejection port 2 of the nozzle 1. The position indicated by the solid line is the position described in FIG.
The position indicated by the chain double-dashed line is the relative position when the guide member 3 is moved downward by S. As can be seen from this figure, since the guide member 3 is formed in a cylindrical shape that is narrowed in the upper constriction shape, the guide member 3 can be installed with respect to the nozzle 1.
Is relatively moved down by S, the throttle portion corresponding to the passage area at the same or substantially the same level as the jet outlet of the nozzle in the water passage surrounded by the guide member is indicated by reference numeral A1 from the position indicated by reference numeral A. It moves to the position shown, and its area greatly changes for the downward movement width S of the guide member 3. Therefore, the form of the fountain changes remarkably in proportion to the downward movement width S of the guide member 3, and the fountain 5 having a tall form as shown by the chain double-dashed line in the figure appears. Similarly, when the guide member 3 is moved upward relative to the nozzle 1, the shape of the fountain changes remarkably for the upward movement width of the guide member 3. Therefore, simply by moving the guide member 3 up and down,
It is possible to intentionally or artificially change the form of the fountain, and by doing so, it is possible to produce a highly variable fountain 5.

As a means for moving the guide member 3 up and down, it is possible to use a cylinder type, a screw shaft type, or any other known lifting mechanism. FIG. 1 shows a cylinder type vertical moving means. This uses a pump P that supplies pressurized water to the nozzle 1 as a power source for the vertical movement means. That is, the guide member 3 is connected to the piston rod 91 of the cylinder 9 fixed at a fixed position, and the discharge port of the pump P is communicated with the two pressure chambers 93 and 94 of the cylinder tube 92 through the lines L ₁ and L _2. It was made. V ₁ and V ₂ are on-off valves interposed in lines L ₁ and L ₂ , respectively, and V ₃ and V ₄ are pressure chambers 93 and 9 respectively.
An on-off valve for venting air that is communicated with 4.

Now, when the pump P is operated to eject water from the ejection port 2 of the nozzle 1 and the fountain 5 in the form of rising from the water surface is formed by the action of the guide member 3 described above, the on-off valves V ₂ , V _{When 3} is opened and the on-off valves V ₁ and V ₄ are closed, the guide member 3 is pushed up by the piston rod 91 and the area of the throttle portion A increases. On the other hand, open the open / close valves V ₁ , V ₄ and open the open / close valves V ₂ , V ₃
When the valve is closed, the guide member 3 is pulled down by the piston rod 91 and the area of the narrowed portion A is reduced.

As in this example, a pump P that supplies pressurized water to the nozzle 1
When is used as a power source for the up-and-down moving means, there is an advantage that the fountain can be changed without providing an additional power source for the up-and-down moving means.

In the above description, the nozzle 1 is fixed and the guide member 3 is moved vertically with respect to the nozzle 1. However, conversely, the guide member 3 is fixed and the nozzle 1 is moved vertically with respect to the guide member 3. You may Further, both the nozzle 1 and the guide member 3 may be moved up and down so that they are relatively moved up and down. It should be noted that the guide member 3 may be arranged at a position surrounding the ejection port 2 of the nozzle 1, and the upper end 3a of the guide member 3 may protrude above the stationary water surface (water surface when operation is stopped). It may be submerged underneath.

The reason why the appearance of the fountain 5 is hardly influenced by the fluctuation of the water level in the fountain device by simply disposing the guide member 3 is presumed as follows. That is, when the guide member 3 is arranged around the ejection port 2 of the nozzle 1, the water area that is attracted by the water ejected from the ejection port 2 and rises up to the water surface together is almost in the range surrounded by the guide member 3. It is inferred that the effect of attraction is limited to the water area outside the guide member 3 due to the limitation.

[Effects of the Invention] According to the fountain device of the present invention, even if the submerged depth of the nozzle outlet changes due to the water level fluctuation, the fountain shape does not react so sensitively, and as a result, the water level fluctuation causes the fountain shape to change. Less likely to affect. On the other hand, by slightly moving the nozzle and the guide member up and down relatively, the shape of the fountain changes remarkably accordingly, so it is possible to consciously or artificially change the shape of the fountain. Therefore, it becomes possible to create a highly variable fountain.

[Brief description of drawings]

FIG. 1 is an explanatory view of a fountain device according to an embodiment of the present invention, and FIG.
FIG. 3 is an explanatory view of a fountain device as a comparative example, and FIG. 3 is an explanatory view showing a variation in the area of the throttle part and a change in the form of the fountain when the guide member is moved downward relative to the nozzle. . W ... Water surface, 1 ... Nozzle, 2 ... Nozzle spout, 3
...... Guide member.

Claims (1)

[Claims] 1. A cylindrical guide member which is narrowed in an upper constriction shape is arranged around an ejection port of the nozzle, and the nozzle and the guide member are configured to be capable of relative vertical movement. Fountain equipment.