JPH0880461A - Fountain nozzle protector - Google Patents

Abstract

(57) [Summary] [Purpose] While improving the appearance of the fountain,
Even if the water level of a pond or river rises to the predicted maximum water level, it prevents clogging and contamination of fountain holes and prevents malfunction. [Composition] The spray section 1 is located below the highest water level HWL predicted above the normal water level WL of the water source 2 such as a pond or river.
5, the fountain nozzle 14 is installed in the water source 2, and the fountain nozzle 14 and the spraying section 15 are covered with the airtight cover 4 having the air intake 9 and the opening 10. Both of 10 are positioned higher than the normal water level WL and lower than the spraying section 15, and the upper limit position IWL of the inner water level of the airtight cover 4 that follows the rising water level of the water source 2 is set to the residual air pressure in the airtight cover 4. Due to this, the air reservoir 6 having a volume that can be suppressed below the position of the spray unit 15
Is formed in the upper part of the airtight cover 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection device for a fountain nozzle installed in a water source such as a pond or river where the water level fluctuates.

[0002]

2. Description of the Related Art In a fountain device installed in a water source such as a pond or a river where the water level fluctuates, particularly in a fog fountain device having a fountain part having small fountain holes, the fountain part is submerged when not in use. Then, the fountain hole may be clogged or soiled, resulting in malfunction. If the fountain hole is clogged or dirty, malfunction may occur.Set the position of the fountain higher than the predicted maximum water level of the water source, and install the fountain nozzle so that it is exposed much higher than the normal water level of the water source. It can be prevented.

However, in water sources such as ponds and rivers that also serve as rainwater regulators, the period of high water level is short, and the fountain is stopped when the water level rises and the fountain is executed at or near the normal water level. . Therefore, set the position of the fountain part higher than the predicted maximum water level of the water source,
With the fountain device installed with the fountain nozzle exposed to a level much higher than the normal water level of the water source, it is possible to prevent malfunctions due to clogging and dirt in the fountain hole, but on the other hand, the exposure of the fountain nozzle during the execution of the fountain looks great. Has the bad drawbacks of.

[0004]

The problem to be solved is to set the position of the fountain higher than the predicted maximum water level of the water source so as to prevent malfunction due to clogging or dirt in the fountain hole. , When the fountain nozzle is exposed, the visibility of the fountain becomes large and the appearance is impaired.When the fountain nozzle is exposed and the visibility of the fountain is reduced to improve the appearance, the water level rises and the fountain hole becomes clogged or dirty. This is a point where malfunctions are likely to occur.

[0005]

According to the present invention, a fountain nozzle having a fountain portion below the highest water level predicted above the normal water level of the water source is installed in the water source, and the fountain nozzle is provided with an air intake. It is arranged in an airtight cover that forms an inlet and an opening, and both the air intake and the opening are positioned above the normal water level and below the fountain part, and follow the rise in water level of the water source. An upper limit position of the inner water level of the airtight cover is characterized in that an air pool having a volume capable of being suppressed to a lower level than the position of the fountain part by the residual air pressure in the airtight cover is formed in an upper part of the airtight cover, By setting the position of the fountain part below the predicted highest water level of the water source, the height of the exposed part of the water surface of the fountain nozzle should be kept low, and the exposed part of the water surface of the fountain nozzle should be covered with an airtight cover. Accordingly, it improves the visual quality, even when raised to high water the water level of the water source is predicted, to avoid the occurrence of clogging or fouling of the fountain hole, to achieve the purpose of preventing the malfunction.

[0006]

According to the present invention, when the fountain is executed at or near the normal water level, the fog fountain injected from the fountain portion into the airtight cover is discharged to the atmosphere through the opening. On the other hand, the fountain is stopped immediately before both the air intake and the opening are sealed with water due to the rise of the water level of the water source, that is, when the water level (outer water level) of the water source rises to the water level at which the water can be fountained. The outside water level rises above the water level at which fountain is possible, and both the air intake port and the opening are water-sealed, so that air is trapped in the air reservoir in the upper part of the airtight cover. When the outer water level rises above the water sealing positions of the air intake port and the opening, the water level (inner water level) of the air pool also rises, and the trapped air begins to be compressed. As the outer water level further rises, the inner water level rises, whereby the air pressure in the air reservoir rises and the inner water level rise is suppressed, and submersion of the fountain portion is avoided.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view taken along the line AA of FIG. 1. In these drawings, a fountain nozzle protection device 1 is a pond or river where the water level fluctuates. It is installed in the water source 2 such as, and is provided with a base 3 fixed to the water bottom 2A of the water source 2 and an airtight cover 4.

The airtight cover 4 is provided with a rising portion 5 and an air reservoir 6 which is connected to the upper end of the rising portion 5 and has a substantially inverted U-shaped cross section, and these have a predetermined interval in the width direction. It has front walls 5A and 6A facing each other, and rear walls 5B and 6B, and both ends in the longitudinal direction are closed by closing plates 7 and 7, and the front wall 5A and the rear wall 5B in the rising portion 5 are provided. The lower end portion of the is detachably fixed to the base 3 by bolts 8 and 8.

The height of the base 3 is set to be substantially equal to the lowest water level LWL of the water source 2, and the height from the water bottom 2A to the upper end of the rising portion 5 is set to a position slightly higher than the normal water level WL of the water source 2. In addition, the height from the water bottom 2A to the top of the air reservoir 6 is set considerably lower than the predicted maximum water level HWL of the water source 2.

The rear wall 5B at the rising portion 5 of the airtight cover 4
A plurality of air intakes 9, 9 are formed by cutting out the upper end of the air trap, and the opposite side of the rising portion 5 in the air reservoir 6 having a substantially U-shaped cross section, that is, the other end of the air reservoir 6 is opened and opened. 1
0 is formed downward. The levels of the upper ends of the plurality of air intakes 9 and 9 and the level of the opening 10 are set at the same position, and the position slightly lower than this position is the fountainable water level WL1.

A header pipe 11 is provided on the upper surface of the base 3 along the longitudinal direction. The front end portion of the header pipe 11 is closed by a closing member (not shown), and the base end side is penetrated through one closing plate 7 and led out to the outside of the airtight cover 4, and the pump 13 is also provided via the water supply pipe 12. It is connected to the.

The header tube 11 in the airtight cover 4 has a plurality of fountain nozzles 14, 1 with a predetermined interval in the longitudinal direction.
4 ... are erected and connected, and the spray portion 15 is attached to the upper end of each of these fountain nozzles 14, 14 ... The spray unit 15 is inserted inside the air reservoir 6.

In the above construction, the water level of the water source 2 is the normal water level WL or a water level in the vicinity thereof, that is, the lowest water level LWL.
When the air reservoir 6 is in communication with the atmosphere in the range of the fountainable water level WL1, the pump 13 is operated to supply high-pressure water to the header pipe 11, so that the fountain nozzles 14,
14 ... A mist is sprayed from the spraying part 15 at the upper end into the air reservoir 6, and the mist is discharged from the opening 10 to the atmosphere. This allows the fog fountain F to be viewed. In this state, the exposed parts on the water surface of the fountain nozzles 14, 14 ... And the spray part 15 are hidden by the airtight cover 4 and are invisible, so that they can be seen in comparison with a conventional fountain device which is visible. The appearance can be improved.

On the other hand, when the water level (outer water level) of the water source 2 rises to the fountainable water level WL1, the operation of the pump 13 is stopped and the fog fountain is stopped. When the outside water level rises above the fountainable water level WL1 and reaches the level WL2 at which both the air intake 9 and the opening 10 are water-sealed, the air is trapped in the air reservoir 6.

When the outer water level rises above WL2, the water level in the air reservoir 6 (inner water level) also rises, and the trapped air begins to be compressed. As the outer water level further rises and the inner water level rises, the air in the air reservoir 6 is compressed and the air pressure rises. Therefore, if the volume of the air reservoir 6 is set so that the upper limit position IWL of the inner water level can be suppressed below the spraying section 15 by the increase in the air pressure in the air reservoir 6, the outer water level can reach the highest water level HWL. Even if it rises, it is possible to avoid submerging the spraying section 15 in water, and thus it is possible to avoid clogging or contamination of the spraying holes and prevent malfunction.

FIG. 3 shows another embodiment in which the present invention is installed by being embedded in the wall surface 2B of the water source 2, and the same or corresponding parts as those of the embodiments of FIGS. The description and operation description are omitted. In this embodiment, the air intake 9 and the opening 10 are used in common, and even with this structure, the same action and effect as those of the above-described embodiment can be achieved.

Further, in the first embodiment shown in FIGS. 1 and 2, the airtight cover 4 is constituted by the rising portion 5 and the air reservoir 6 having a substantially inverted U-shaped cross section, which is connected to the upper end of the rising portion 5. However, the front wall and the lower ends of the front wall 5A and the rear wall 5B in the rising portion 5 are detachably fixed to the base 3 by the bolts 8 and 8 as described above, but as shown in FIG. The air-tight cover 4 may be configured to be detachably fixed to the base 3 directly by forming the air-tight cover 4 only by the air reservoir 6 having a substantially inverted U-shaped cross section. With such a configuration, when the fountain is executed, a part of the fountain nozzles 14, 14, ... Is visually observed, but the effect is not so great as to deteriorate the appearance. Further, the directivity of the opening 10 is not limited to the downward direction described above, and may be the lateral direction as shown in FIG.

[0018]

As described above, according to the present invention, all or most of the exposed portion of the fountain nozzle on the water surface and the sprayed portion are concealed by the airtight cover in a state where the fountain can be visually observed. The appearance can be improved as compared with the conventional fountain device. Further, even if the outside water level rises to the predicted maximum water level, it is possible to avoid submersion of the fountain portion, so it is possible to avoid clogging and dirt of the fountain hole and prevent malfunction.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is a vertical side view showing another embodiment.

FIG. 4 is an enlarged cross-sectional view showing a modified example of the airtight cover.

FIG. 5 is an enlarged cross-sectional view showing another modified example of the airtight cover.

[Explanation of symbols]

 1 Fountain nozzle protection device 2 Ponds and rivers (water source) 4 Airtight cover 6 Air reservoir 9 Air intake 10 Opening 14 Fountain nozzle 15 Spray part (fountain part) WL Normal water level of water source IWL Upper limit of inner water level of airtight cover HWL prediction Highest water level

Claims (1)

[Claims] 1. A watertight cover provided with a fountain nozzle having a fountain portion below the highest water level predicted above the normal water level of the water source, and the fountain nozzle forming an air intake and an opening. And the air intake and the opening are both positioned higher than the normal water level and lower than the fountain part, and the upper limit of the inner water level of the airtight cover that follows the rise of the water level of the water source. The fountain nozzle protection device is characterized in that an air pool having a volume capable of suppressing the position to a lower level than the position of the fountain part by the residual air pressure in the airtight cover is formed in the upper part of the airtight cover.