JPH03258367A - Formation of water screen and equipment thereof - Google Patents

Abstract

PURPOSE:To reduce disturbance of the picture formed of a water screen which is caused by wind by tilting and spraying water in a curtain shape in the windward side at a prescribed angle in accordance with the strength of wind in the opposite side of the projection surface of the water screen. CONSTITUTION:A fixed spray equipment 8 sprays water in a curtain shape to the vertical direction to form a water screen 72. A tilt variable equipment 1 is arranged side by side along the fixed spray equipment 8 to the opposite side of the projection surface of this water screen 72. This equipment 1 is constituted of a main pipe 2 constituted rotatably around its axis, the nozzles 4 group which are arranged to the axial direction and fitted to the outer circumferential surface of the main pipe 2 and a means which supplied high-pressure water to the nozzles 4 via the main pipe 2 and sprays it. This water is sprayed in a curtain shape to the vertical direction to form the water screen 2. Morever the water is sprayed in the curtain shape by tilting it to the windward side at a prescribed angle in accordance with the strength of wind in the opposite side of the projection surface of the water screen 72. As a result, disturbance of the picture formed of the water screen caused by wind is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> 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.

This water vision, as shown in FIG. 7, sprays water from a spray nozzle a installed above the water surface to form a water screen b, and projects an image on 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 a water screen is formed by spraying water vertically in a curtain shape, and the projection surface of this water screen is This is a method of forming a water screen, which is characterized in that the screen is tilted upwind at a predetermined angle depending on the strength of the wind, and water is sprayed in a screen shape on the opposite side of the screen.

In addition, as a means for realizing the above method, a fixed jetting device that sprays water vertically in a curtain shape to form a water screen, and a fixed jetting device installed in parallel along the fixed jetting device on the opposite side of the projection surface of the water screen. The variable inclination device consists of 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, and a group of nozzles connected to the nozzles via the main pipe. This is a water screen forming device characterized by comprising means for supplying and spraying high-pressure water.

Therefore, according to the present invention, when there is wind, the injection nozzle of the variable inclination device is tilted to the windward side at an appropriate angle depending on the strength of the wind, and the rear screen is moved to the wind pressure barrier or support of the front screen. As a result, the scattering of water particles can be stopped within a narrower range than before, the projection surface can be kept in a nearly flat state, and the difference in density of water particles can be reduced.

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

<A> Fixed injection device The fixed injection device 8 is a known high-pressure water injection device, and for example, as shown in FIG. , a structure in which the tip of each nozzle 82 is fixed so as to face vertically upward may be considered.

A high-pressure water injection pump is connected to this main pipe 81 via a water pipe (not shown), and this pump is operated to -
, high-pressure water can be injected vertically upward from the nozzle 82 to form a water screen.

<Exit> Variable Tilt Device The variable tilt device 1 is installed along the fixed spray device 8 on the opposite side of the projection surface 72 of the water screen formed by the fixed spray device 8 (1! behind the audience seats).

The specific structure of the variable tilt device 1 will be described below.

(1) Main pipe The main pipe 2 is a both-ends closed type tube body consisting of a fixed pipe 21 and a rotating pipe 22 connected to both ends of the fixed pipe 21 in the axial direction.

The connecting portion between the fixed tube 21 and the rotating tube 22 is a movable joint 3.
etc., to connect the rotary tube 22 so that it can rotate.

The movable joint 3 is connected to the fixed tube 21 as shown in FIG.
and a flange 2 formed at the peripheral edge of the connecting end of the rotary tube 22.
3.24, a rubber seal O-ring 31 is sandwiched between the flanges 23 and 24, and both flanges 23 and 24 are held by a joint ring 33 having a tapered bearing 32 inside.

The joint ring 33 is divided into halves, fitted onto the flanges 23 and 24, and then fixed together with bolts or the like.

In addition, as shown in FIG. 3, the fixed tube 21 is replaced with the rotating tube 22.
It may be made of a durable reinforced rubber or the like that can tolerate rotation.

(2> Water pipe One end of a water pipe 25 is connected to the fixed pipe 21 .

On the other hand, the other end of the water pipe 25 is connected to a high-pressure water injection pump (not shown).

(3) Nozzle A plurality of nozzles 4 are attached to the outer peripheral surface of the rotary tube 22 in a row 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.

(4) Rotating device As a means for rotating the rotating tube 22 around the axis, for example, as shown in FIG. The ring gear 5 and the motor 51 are connected together using a known gear structure.

Alternatively, as shown in FIG. 4, the tip of the telescopic rod of the cylinder 6 may be pivotally supported on the main pipe 2, so that the rotary pipe 22 can be rotated by the expansion and contraction of the cylinder 6.

<Operation according to the embodiment> When the wind force is weak and does not affect the water screen, the variable inclination device 1 is stopped and only the fixed injection device 8 is operated.

. That is, the high pressure water injection pump of the fixed injection device 8 is activated,
Water is injected from the nozzle 82 through the water pipe to form a water screen.

When the wind gradually becomes stronger and the image on the water screen begins to become distorted, the motor 51 is activated to rotate the rotary tube 22.

Then, the nozzle 4 is tilted to the windward side at an appropriate angle depending on the strength of the wind, and water is sprayed 7 to form a back screen 7.

When the wind is blowing from the audience seats, the rear screen 7 supports the front screen 71 from behind, as shown in Figure 5, and the water particles on the front screen 7 are directed to the leeward side (the opposite side of the audience seats). can be prevented from dispersing over a wide area.

Also, if the wind is blowing from the opposite side of the audience seats,
As shown in the figure, the rear screen 7 is connected to the front screen 7.
1 and weakens the wind force, thereby preventing water particles on the front screen 7 from scattering over a wide area downwind (toward the audience seats).

Therefore, the scattering of water particles on the front screen 71 can be stopped within a narrower range than before, the projection surface 72 can be kept in a nearly flat state, and the difference in the density of water particles can be reduced.

<Other Examples> The above is the variable tilt device N! '1 main pipe 2, fixed pipe 21
and rotating tubes 22 on both sides,
A structure in which the main pipe 2 is configured to be rotatable over its entire length without providing a fixed part, and a flexible water pipe is connected to the coated or end portion of the main pipe 2 is also considered.

Further, a structure in which one end of the main pipe 2 whose entire length is rotatable and one end of a water pipe such as a steel pipe are connected by the above-mentioned movable joint 3 is also considered.

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 is as described below, the following effects can be expected.

In other words, the water screen is made of water particles, so when the wind blows, the water particles scatter over a wide area, making the projection surface noticeably uneven. The difference becomes larger.

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

On the other hand, the device of the present invention is configured so that when there is wind, the spray nozzle of the tilt variable device is tilted toward the windward side at an appropriate angle depending on the strength of the wind to spray, thereby forming a back screen. It is something.

Therefore, the rear screen can be used as a protective wall or support for the front screen, stopping the scattering of water particles within a narrower area than before, keeping the projection surface close to a flat surface, and minimizing the difference in the density of water particles. Can be made smaller.

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

[Brief explanation of drawings]

Fig. 1.2: An explanatory diagram of one embodiment of the present invention Fig. 3: An explanatory diagram of other structures of the fixed tube Fig. 3: An explanatory diagram of other structures of the rotating means Fig. 5.6: Two illustrations of the action Explanatory diagram Figure 7.8: Explanatory diagram of the prior art Illustration of technology Figure 8 Illustration of conventional technology

Claims (2)

[Claims] (1) In the method of forming a projection water screen that projects an image, a water screen is formed by spraying water vertically in the form of a curtain, and at the same time, on the opposite side of the projection surface of this water screen, water is A method for forming a water screen, characterized by tilting it upwind at a predetermined angle and spraying water in a screen shape. (2) In a device for forming a projection water screen formed by jetting water, there is a fixed jetting device that jets water vertically in a curtain shape to form a water screen, and a fixed jetting device on the opposite side of the projection surface of the water screen. The variable inclination device consists of a variable inclination device installed in parallel along the injection device. , A water screen forming device characterized by comprising means for supplying high-pressure water to a nozzle via a main pipe and spraying it.