JPH0748128B2 - Multi-branch water flow generator including underwater sound - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a fountain consisting of a large number of parabolic water streams, in which each water stream includes a water drop generated by containing underwater sound. In order to realize a beautiful ornamental fountain where the polka dots shine when illuminated with light,
The present invention relates to a multi-branch water flow generator including underwater sound.

(Prior Art) Conventionally, a hose through which water passes is hit by a timer at regular time intervals to generate underwater sound in the water flow in the hose, and when this dense underwater sound reaches the ejection port, the vicinity of the ejection port When a large part of the molecular motion of water occurs in the water, and when this part of the large molecular motion is ejected from the jet outlet, that part forms a polka dot in the jet water flow, and the jet water flow including this polka dot is irradiated with multi-strobe light. A method of expressing a jet water flow by shining polka dots on the surface is disclosed in Japanese Patent Publication No. 61-26.
This is disclosed in Japanese Patent No. 068 (Patent No. 1371156).

(Problems to be Solved by the Invention) The above Japanese Patent Publication No. 61-26068 is intended as a physical teaching material for explaining a parabola, and is intended for a single water flow. An ornamental fountain consisting of a large number of fountains of interest can be obtained, but this is not practical because the device becomes complicated.

Therefore, when trying to combine these into one and simplify it, there were problems that reflected waves and diffracted waves were generated in the water flow and unnecessary water drops were generated in the fountain, and the water flow was disturbed.

Therefore, there has been a problem of means for suppressing the generation of reflected waves and diffracted waves and branching into a large number of regular water streams.

(Means for Solving the Problems) The present invention for solving the above problems includes a lower main body having a water pipe connected to the center of the lower end of a cylinder, and a large number of branch pipes at the upper end peripheral portion of a truncated cone. A hollow body is formed by connecting with the connected upper body, and an inverted cone is hung from the upper end at the center of the inside of the upper body, and vibration is generated in the upper half of the cylinder inside the lower body. The underwater sound generator incorporating the means is installed so that an annular water channel is formed between the inner circumference and the annular water channel, and the annular water channel is supported by a plurality of laterally-supported support pipes. A vibrating membrane made of a circular elastic body is stretched and closed, a vibrating coil is bonded to the lower surface of the center of this vibrating membrane, and a ring-shaped ring is attached to a core with a cylindrical protrusion that fits inside the vibrating coil. A permanent magnet is arranged around the vibrating coil, and the lower body is further A porous sponge having water permeability and elasticity is filled into the bottom of the filter to form a filter, and this sponge closes the lower end of the annular water channel, and part of the sponge enters the lower half of the cylindrical body of the underwater sound generator. Then, the multi-branch water flow generating device including underwater sound is formed in the lower half of the cylindrical body to form an air reservoir in which the sponge is exposed.

(Operation) The main purpose of the present invention is not to include unnecessary polka dots in a large number of fountain water streams, and to make only polka dots due to regular underwater noise appear. The causes of unnecessary polka dots are as follows. is there.

(A) External vibration (b) Pulsating flow and turbulent flow (c) Diffracted wave and reflected wave of generated underwater sound Here, in order to prevent the influence of (a) external vibration,
The upper body and the lower body are made of a material that does not easily vibrate, such as rubber or plastic.

The pulsating flow / turbulent flow of (b) is always included in the water sent by the pump, and the pulsating flow / turbulent flow of the water supplied from the water supply pipe is reduced or eliminated by the built-in filter.

The diffracted wave and the reflected wave of (c) are prevented from being generated by the structure of the present invention.

That is, the water supplied from the water supply pipe first passes through the filter. At this time, the elasticity of the sponge itself and the volume elasticity of the air contained in the air reservoir and the portion of the sponge exposed to the air reservoir are The synergistic effect reduces and eliminates pulsating flow and turbulent flow in the water supply, and then moves up the annular channel to fill the space inside the upper body.

Since this space has a conical inner circumference and an inverted conical body hangs in the center, the surrounding walls are all circumferential surfaces with no flat surface or unevenness, and at the bottom end Circular,
As it goes upward, the cross section becomes a donut shape in which the area gradually narrows, and it flows into a large number of branch pipes from the upper end.

The vibrating membrane of the underwater sound generator is located at the bottom of this space, and the vibrating membrane vibrates 50 or 60 times per second by the action of the vibrating coil to generate underwater sound in the water filling the space.

At this time, the vibrating film has a circular shape, and the vibration source acts on the center of the circular shape to uniformly propagate the vibration to the surroundings and suppress the generation of the diffracted wave as a structure in which the shadow of the wave propagation does not occur.

Further, the generation of the reflected wave is suppressed by the structure in which a plane perpendicular to the wave propagation direction causing the reflected wave or a deformed portion is not formed on the inner wall of the cone and the outer circumference of the inverted cone.

Thus, when the underwater sound reaches a large number of branch pipes, the molecular motion of water becomes vigorous, and beautiful water dots successively appear in the water flow ejected from the branch pipes.

Patent application No. 25 of 1990 related to the applicant's application for this fountain
When the invention of No. 3533 "Identification method for moving granular objects" is carried out and multi-strobe lights of two or more colors are alternately emitted,
The polka dots contained in the fountain shine red and blue and you can enjoy it as a beautiful fountain.

(Examples) Hereinafter, the present invention will be described in detail based on examples shown in the drawings.

FIG. 1 shows a central longitudinal cross section of the device of the present invention, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 is a bottom view, respectively. It consists of a plastic bottomed cylinder, a flange (1a) is formed around the upper end opening, and a water supply pipe (2) is connected to the center of the lower end, and the bottom of the inner diameter range of this water supply pipe (2) Is the fourth
As shown in the figure, a large number of water supply holes (3) are provided.

(4) is an upper body, which has a hard-cone-shaped frustoconical outer shell, a flange (4a) is formed on the outer circumference of the lower end, and a large number of branch pipes (5) are connected to the peripheral edge of the upper end.

The lower body (1) and the upper body (4) are joined to each other through the flanges (1a) and (4a) via the packing (6), and are connected by a large number of bolts (7) and nuts (8) to form a hollow body. The hollow body is provided with an inverted conical body (9) hanging down from the top of the upper body (4) to the center, and an annular water channel (10) is formed between the hollow body and the inner periphery of the lower body (1). And an underwater sound generator (11) in which vibration generating means is incorporated in the upper half of the cylindrical body is attached to the lower body (1) by four support pipes (12) penetrating the annular water channel (10). It is supported and installed.

The structure of the underwater sound generator (11) consists of an upright cylinder (1
A midsole (14) is provided approximately in the center of the height of 3),
The vibration film (15) made of circular rubber is pressed at the upper end by a ring-shaped film retainer (16) and stopped by a number of small screws (17) to stretch and close the center of the vibration film (15). A vibrating coil (18) is bonded to the lower surface of the part, and a ring-shaped permanent magnet (20) is provided around the vibrating coil (18) with a small gap (G) between the vibrating coil and the vibrating coil. Placed
The permanent magnet (20) is attached to a circular seat (19a) formed at the lower end of a core (19) having a cylindrical projection fitted in the center of the vibrating coil (18).
9) is fixed on the insole (14).

Further, a cushion material (2) made of sponge is provided in the vibration coil (18) between the upper end of the core (19) and the vibration film (15).
1) is interposed to prevent the vibrating membrane (15) from being excessively curved downward due to water pressure.

In addition, the support pipe (12) also serves as a ventilation path that communicates the inside of the underwater sound generator (11) with the atmosphere, and a power cord (not shown) is inserted from one of the support pipes (12) so that the vibration coil ( Energize 18).

(22) is a filter, which is a porous sponge (23) having elasticity and water permeability, which is formed in the lower part of the lower body (1),
While blocking the lower end of the annular water channel (10), it also enters and fills the lower half of the cylindrical part at the bottom of the underwater sound generator (11), and is filled between the upper end of this sponge (23) and the insole (14). An air reservoir (24) is formed on the.

With the above structure, the water injected from the water supply pipe (2) enters the lower body (1) through the water supply hole (3), passes through the sponge (23), and rises in the annular water channel (10). At this time, the water surface (W) is located in the sponge (23) in the lower cylindrical portion of the underwater sound generator (11), and the sponge (23) and the air reservoir (24) above this liquid surface (W) are located. The air will be compressed and remain.

Thus, when water passes through the sponge (23), the elasticity of the sponge (23) itself and the volume elasticity of the sum of the air contained in the air reservoir (24) and the sponge (23) above the liquid surface (W). The pulsating flow and turbulent flow contained in the water are filtered and rectified by the synergistic effect of.

Thus, the rectified water fills the space (S) in the upper body (4), and the vibrating membrane (15) of the underwater sound generator (11) is located in the lower part of this space (S). ) Faces,
When an alternating current of 60 Hz is applied to the vibrating coil (18), the vibrating coil (18) vibrates vertically due to the magnetic field force between the vibrating coil (18) and the permanent magnet (20), and the vibrating film (15). By vibrating, the underwater sound is generated in the water in the space (S).

At this time, the underwater sound generator (11) must be in a form that does not easily generate diffracted waves.

Bad examples in which diffracted waves are generated are shown in FIGS. 7, 8 and 9.

FIG. 7 shows a water supply pipe (2 ') provided on the conical wall of the space (S), and the joint (t) between the water supply pipe (2') and the conical wall.
A diffracted wave (k) is generated at the part as shown by the broken line arrow, and this diffracted wave (k) causes unnecessary polka dots.
Therefore, the peripheral wall surface must not be deformed.

FIG. 8 is a plan view of the square underwater sound generator (11 ′), and FIG. 9 is a central sectional view of FIG. 8 showing four corners (p) of the square vibrating membrane (15 ′), (Q), (r), (s)
Is difficult to vibrate, the underwater sound generated by the vibration of the center is a factor that diffracts into the four corners (p), (q), (r), and (s) to create unnecessary polka dots. Therefore, do not use diaphragms other than circular, such as square.

Next, the reflected wave is likely to occur when there is a plane perpendicular to the traveling direction of the underwater sound, and if there is no inverted cone (9) hanging in the space (S), The inner surface of the top of the main body (4) becomes a flat surface, and when the underwater sound reaches this flat surface, a reflected wave is generated, and this reflected wave causes unnecessary polka dots, thus forming a space (S). Do not make a plane inside.

In this respect, the present invention has a configuration in which neither a diffracted wave nor a reflected wave is generated, and the underwater sound generated in the water in the space (S) proceeds upward and reaches the vicinity of the upper branch pipe (5) to reach the water molecule. Movement becomes active and forms beautiful waterdrops in the fountain ejected from the branch pipe (5).

The principle of forming the polka dots is shown in the above-mentioned Japanese Patent Publication No. 61-26068, and detailed description thereof will be omitted here.

The multi-branched water stream containing the polka dots obtained in this manner is alternately irradiated with two or more colors of multi-strobe light according to the invention of the above-mentioned Japanese Patent Application No. 253533 “Movement of moving granular objects”. Then, the polka dots contained in the fountain shine red or blue, and a beautiful ornamental fountain is obtained.

(Effects of the Invention) According to the multi-branch water flow generating device including underwater sound according to the present invention described above, the water flow supplied from the water supply pipe first passes through the filter so that the elasticity of the sponge and the air in the air reservoir The pulsating flow and turbulent flow contained in the water flow can be filtered and rectified by the synergistic effect with bulk elasticity, and the vibrating membrane is made circular, and the vibration source acts on the center of the vibrating membrane, and Generation of diffracted waves and reflected waves by configuring the peripheral wall with a circumferential surface centered on the vertical axis that passes through the vibration generation point and making it a plane that is perpendicular to the propagation direction of underwater sound and no unevenness To prevent unnecessary polka dots from occurring, resulting in a multi-branch water flow containing only polka dots due to underwater sound,
A beautiful fountain for ornamental use can be obtained by irradiating the fountain flow composed of the multi-branch water flow with multi-strobe light of two or more colors.

[Brief description of drawings]

FIG. 1 is a central longitudinal side view showing an embodiment of the present invention. FIG. 2 is a side view of the same. FIG. 3 is a plan view of the same. FIG. 4 is a bottom view of the same. FIG. 5 is a view of FIG. 1 taken along the line AA. FIG. 6 is a sectional view taken along line BB in FIG. FIG. 7 is a central longitudinal sectional view showing a bad example in which a diffracted wave is generated. FIG. 8 is a plan view of an underwater sound generator, similarly showing a bad example in which diffracted waves are generated. FIG. 9 is a sectional view taken along line CC of FIG. 1 …… Lower body 2 …… Water supply pipe 3 …… Water supply hole 4 …… Upper body 5 …… Branching pipe 9 …… Inverted cone 10 …… Annular water channel 11 …… Underwater sound generator 12 …… Support pipe 15… Vibrating membrane 18 Vibrating coil 19 Core 20 Permanent magnet 22 Filter 23 Sponge 24 Air reservoir

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location F21P 7/00 7137-3K

Claims (1)

[Claims] 1. A hollow body is formed by connecting a lower main body having a water supply pipe connected to the center of the lower end of a cylindrical shape and an upper main body having a large number of branch pipes connected to the upper peripheral edge of a frustoconical shape. An inverted conical body is hung from the upper end at the center of the inside of the upper body, and an underwater sound generator incorporating vibration generating means in the upper half of the cylindrical body is provided inside the lower body between the inner circumference and the inner circumference. An annular water channel is formed and installed by being supported by the lower main body by a plurality of support tubes that laterally circumscribe the annular water channel. The underwater sound generator has an upper end provided with a vibrating membrane made of a circular elastic body. The vibration coil is adhered to the lower surface of the center of the vibration film, and a ring-shaped permanent magnet attached to a core having a cylindrical protrusion housed inside the vibration coil is arranged around the vibration coil. ,
Further, the bottom of the lower body is filled with a porous sponge having water permeability and elasticity to form a filter, and the sponge closes the lower end of the annular water passage, and the lower half of the cylindrical body of the underwater sound generator. A multi-branch water flow generating device including underwater sound, characterized in that a part of the water enters into a portion to form an air reservoir in which the sponge is exposed in a lower half portion of the cylindrical body.