JPH03167542A - Method and device for forming water screen - Google Patents

Abstract

PURPOSE:To reduce irregularities in the image of a water screen caused by wind by inclining a nozzle toward the wind by a prescribed angle according to the strength of the wind and injecting water in a curtain state. CONSTITUTION:In the case that wind power is weak and the water screen is not affected by the wind, the water screen is formed by operating a high- pressure water injection pump under a state that the nozzle 3 is faced in a vertical direction and injecting the water from the nozzle 3 through a water supply pipe 15. When the wind gradually gets strong and the irregularities in the image of the water screen is generated, a rotary pipe 12 is rotated by operating a motor 41. Then, when the water screen is formed by inclining the nozzle 3 toward the wind by a proper angle and injecting the water according to the strength of the wind, the wind power and the injecting force of the water collide with each other and a part thereof is cancelled. As the result, the splash of the water particles of the water screen is suppressed within a narrow range. In such a way, even in the case that there is wind, the image projected on the water screen is kept clear.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method and apparatus for forming a water screen for projection by spraying water.

<Prior Art> In recent years, various events have been held at event venues and the like using devices called so-called water vision.

As shown in FIG. 7, this water vision system sprays water from a spray nozzle a installed above the water surface to form a water screen b, and projects an image onto the water screen b.

When there is almost no wind, the projection surface C of the water screen b on the audience side is nearly flat and the density of water particles is even, so that images can be projected clearly.

<Problems to be Solved by the Present Invention> In the above-mentioned water vision, since the water screen b is formed of water particles, as shown in Fig. 8, when the wind blows, the water particles spread over a wide range. As a result, the projection surface C becomes noticeably uneven, and at the same time, the difference in the density of the water particles forming the water screen b increases.

Therefore, the image projected on the projection surface C becomes unclear.

<Object of the present invention> The present invention has been made to solve the above-mentioned problems, and provides a method and apparatus for forming a water screen that can reduce image disturbance caused by wind on the water screen. The purpose is to

<Means for Solving the Problems> That is, the present invention provides a method for forming a projection water screen for projecting an image, in which water is sprayed in a curtain shape at a predetermined angle to the windward side depending on the strength of the wind. It is characterized by
This is a method of forming a water screen.

In addition, as a means for realizing the above water screen forming method, a main pipe configured to be rotatable around an axis, a group of nozzles arranged in the axial direction on the outer peripheral surface of this main pipe, and a This is a water screen forming device characterized by comprising means for supplying and spraying high pressure water to a nozzle.

Therefore, according to the present invention, when there is wind, the injection nozzle is tilted to the windward side at an appropriate angle depending on the strength of the wind, and the jet force of the wind and water collide and partially offset each other. The scattering of water particles can be stopped within a narrower range than in the past, the projection surface can be kept in a nearly flat state, and the difference in the density of water particles can be reduced.

<Example> Next, embodiments of the present invention will be described.

In this embodiment, the main pipe is composed of a fixed pipe and rotating pipes provided on both sides of the main pipe.

<A> Main pipe The main pipe 1 is a both-ends closed type pipe body consisting of a fixed pipe 11 and a rotating pipe 12 connected to both ends of the fixed pipe 11 in the axial direction.

The connecting part between the fixed pipe 11 and the rotating pipe 12 is a movable joint 2.
etc., to connect the rotary tube 12 so that it can rotate.

The movable joint 2 is connected to a fixed pipe 11 as shown in FIG.
and a 7 flange 1 formed at the peripheral edge of the connecting end of the rotary tube 12.
In this structure, an O-ring 21 of a rubber seal is sandwiched between the flanges 13 and 14, and both flanges 13 and 14 are held by a joint ring 23 having a tapered bearing 22 inside.

The joint ring 23 is divided into halves, fitted onto the flanges 13 and 14, and then fixed together with bolts or the like.

In addition, as shown in FIG. 3, the fixed tube 11 is replaced with the rotating tube 12.
It may be made of a flexible reinforced rubber or the like that can tolerate rotation.

<mouth> water pipe One end of a water pipe 15 is connected to the fixed pipe 11 .

On the other hand, the other end of the water pipe 15 is connected to a high-pressure water injection pump (not shown).

<C> Nozzle A plurality of nozzles 3 are attached to the outer circumferential surface of the rotary tube 12 in parallel in the axial direction.

For example, if they are arranged at equal intervals on a straight line in the axial direction, a screen with an even density of water particles can be obtained.

<2> Rotating device As a means for rotating the rotary tube l2 around the axis, for example, as shown in FIGS. 1 and 2, a ring gear 4 is installed near the movable joint 2 of the rotary tube 12 along the outer circumferential surface. The ring gear 4 and the motor 41 are connected together using a known gear structure.

Alternatively, as shown in FIG. 4, the tip of the telescopic rod of the cylinder 5 may be pivotally supported on the main pipe 1, so that the rotary pipe 12 can be rotated by the expansion and contraction of the cylinder 5.

<Operation according to the embodiment> When the wind force is weak and does not affect the water screen, the high-pressure water jet bomb is activated with the nozzle 3 facing vertically, and water is jetted from the nozzle 3 via the water pipe 15. and form a water screen.

When the wind gradually becomes stronger and the image on the water screen begins to become distorted, the motor 41 is activated to rotate the rotary tube 12.

Then, the nozzle 3 is tilted to the windward side at an appropriate angle depending on the strength of the wind, and water is sprayed to form a water screen 6.

Then, the wind force and the water jet force collide and partially cancel each other out, and the scattering of water particles on the water screen 6 can be stopped within a narrower range than before.

Therefore, the projection surface 61 can be maintained in a nearly flat state, and the difference in density of water particles can be reduced.

FIG. 5 shows a case where the wind is blowing from the opposite side of the audience seats, and FIG. 6 shows a case where the wind is blowing from the side of the audience seats.

<Other Examples> In the above example, the main pipe 1 is structured by the fixed pipe 11 and the rotating pipes 12 on both sides thereof, but the main pipe 1 is not provided with a fixed part,
A structure in which the entire length is configured to be rotatable and a flexible water pipe is connected to the middle or end of the main pipe 1 is also considered.

It is also possible to consider a structure in which one end of the main pipe 1, which is rotatable over its entire length, and one end of a water pipe such as a steel pipe are connected by the above-mentioned movable joint 2.

In addition, various structures can be considered for the connection method between the water pipe and the main pipe.

<Effects of the Present Invention> Since the present invention has been described above, the following effects can be expected.

In other words, since the water vision screen is made of water particles, when the wind blows, the water particles scatter over a wide area, making the projection surface noticeably uneven, and at the same time, the difference in the density of the water particles forming the water screen increases. growing.

Therefore, the conventional method has the disadvantage that the image projected on the projection surface is disturbed by the wind.

In contrast, the device of the present invention is configured such that the injection nozzle can be tilted upwind at an appropriate angle depending on the strength of the wind.

Therefore, the scattering of water particles can be stopped within a narrower range than in the past, the projection surface can be kept in a nearly flat state, and the difference in the density of water particles can be reduced.

Therefore, even when there is wind, the image projected on the water screen can be kept clearer than before.

[Brief explanation of the drawing]

Figures 1 and 2: An explanatory diagram of one embodiment of the present invention. Figure 3: An explanatory diagram of other structures of the fixed tube. Figure 4: An explanatory diagram of other structures of the rotating means. Figures 5 and 6: Showing the action. Explanatory diagrams 7 and 8: Explanatory diagrams of conventional technology

Claims (2)

[Claims] (1) A method for forming a water screen for projection that projects an image, characterized by spraying water in a curtain shape at a predetermined angle to the windward side depending on the strength of the wind. . (2) A device for forming a projection water screen formed by jetting water, which includes: a main pipe configured to be rotatable around an axis; a group of nozzles attached to the outer peripheral surface of the main pipe in line in the axial direction; A device for forming a water screen, consisting of a means for supplying high-pressure water to a nozzle through a pipe and spraying it.