JPH07198238A - Snow producing nozzle of artificial-snow spray machine - Google Patents

Abstract

PURPOSE:To obtain a snow producing nozzle of an artificial-snow spray machine, where water is turned into a film-like flow with an extremely simple construction, and pressurized air is flowed in the direction perpendicularly intersecting the plane of the film-like water flow to efficiently atomize water. CONSTITUTION:In an artificial-snow spray machine with a snow producing nozzle 10, pressurized water and air are supplied into the nozzle 10 to mix up them, water atomized by the adiabatic expansion of air is cooled and the atomized water and air are spouted from the tip of the nozzle 10 to produce artificial snow. Circular rings 14 are situated at around a position in the nozzle 10, where pressurized water 11 and pressurized aim 12 mix up, and two or more water jet. holes 17 that spout water are provided out the periphery of the circular rings 14. The pressurized water 11 is spouted from the water jet holes 17 to let the water strike on the circumferences of the circular rings 14, so that water films are formed on both side of the circular rings 14. The pressurized air 13 is flowed to the water films to transform time water films to atomized water (water droplets) and the atomized water is spouted from the tip of the nozzle 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snowmaking nozzle for an artificial snowmaking machine, in which water is atomized, water droplets atomized by adiabatic expansion of air are cooled and blown farther from the tip of the nozzle to make snow. .

[0002]

2. Description of the Related Art The snow-making principle of a gun-type artificial snowfall machine is that water is atomized, adiabatic expansion of air cools the atomized water droplets, and the jets of water droplets and air fly the water droplets far away. It's snowing. Here, the most important factor in efficiently producing high quality artificial snow is how to efficiently atomize water. As the method, in the conventional gun type artificial snowfall machine, the following three methods are adopted.

(1) As shown in FIG. 4, pressurized water 11 and compressed air (compressed air) 12 are jetted through the nozzle 10 at a high speed from the tip of the nozzle, and the speed difference with the outside of the nozzle is used to atomize the water. How to do. (2) As shown in FIG. 5, the collision plate 13 is provided in the nozzle 10, the pressurized water 11 is collided with the collision plate 13 to atomize the water, and the pressurized air 12 is simply blown. (3) As shown in FIG.
1 is sprayed, pressurized air 12 is sprayed on the sprayed water, and the water is sheared to atomize.

The above methods (1) to (3) may be used alone or, of course, may be used in combination of two or more.

[0005]

However, all of the conventional methods (1) to (3) have the following problems. In the method (1), it is difficult to expect the atomization effect only from the viewpoint of the efficiency of atomization. Also,
Also in the method (2), atomization efficiency is not good only by causing the water flow to collide with the collision plate 13. Since a large amount of pressurized air 12 is consumed in the gun-type snowmaking machine, how to effectively use the pressurized air 12 is an extremely important factor in evaluating the performance of each snowmaking machine. However, from this point, reviewing the shearing action by air in (3), it is known that when the water flow is sheared by air, if the water flow is made into a film shape, the water can be more effectively atomized.

The present invention has been made in view of the above-mentioned points, and makes water into a film with an extremely simple mechanism, and pressurizes air in the film-shaped water in a direction orthogonal to the film surface to efficiently An object is to provide a snowmaking nozzle of an artificial snowfall machine that can atomize water.

In order to solve the above-mentioned problems, according to the present invention, pressurized water and air are injected into a nozzle and mixed, and the water atomized by adiabatic expansion of air is cooled and atomized from the nozzle tip. In a snow making nozzle of an artificial snow machine that sprays water and air to make snow, as shown in FIG. 1, water (pressurized water 11) and air (pressurized air 12) in the nozzle (10).
A plurality of water ejection ports for ejecting water to the outer periphery of the annular ring (14, 14) while providing the annular ring (14, 14) in a direction substantially orthogonal to the axial direction of the nozzle (10) in the vicinity of the mixing position of (17, 17) is provided, and the water outlet (17, 1)
Water (11) is ejected from 7) to form an annular ring (14, 1).
The water film is formed by colliding with the outer circumference of 4) to form water films on both sides of the annular ring (14, 14), and air (12) is caused to flow through the water film from the axial direction of the nozzle (10) to atomize the water film. It is characterized by

[0008]

According to the present invention, as described above, the annular ring (1) is provided in the vicinity of the position where the water (11) and the air (12) are mixed in the nozzle (10) in a direction substantially orthogonal to the axial direction of the nozzle (10).
4, 14) and annular ring (14, 14)
Since a plurality of water jets (17, 17) for jetting water are provided on the outer periphery of the water, when the water (11) is jetted from the water jets (17, 17), the water (11) becomes an annular ring. Colliding with the outer circumference of (14, 14), the annular ring (14, 14)
Form a water film on both sides of 14). Nozzle (1
When air (12) is made to flow from the axial direction of (0), the water film is sheared by the air flow and efficiently atomized.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B are views showing a structure of a snowmaking nozzle of an artificial snowfall machine of the present invention, FIG. 1A being a vertical sectional view and FIG. 1B being FIG.
It is an AA sectional view of (a). The snowmaking nozzle is a conical pipe with a narrow tip, and a water / air mixing chamber 20 for mixing water and air is provided therein, and a water chamber 16 is provided at an outer peripheral portion of the water / air mixing chamber 20. ing. At the rear end of the water / air mixing chamber 20, there is provided an air supply port 18 for supplying the pressurized air 12 in a direction substantially coinciding with the axial direction of the nozzle 10, and at the rear end of the water chamber 16 is the axial direction of the nozzle 10. A water supply port 19 for supplying the pressurized water 11 in a direction deviated from is provided.

The ring-shaped rings 14, 14 are provided in a direction substantially orthogonal to the axial direction of the nozzle 10 of the water / air mixing chamber 20, and the water chamber is formed on the wall surface of the nozzle 10 located on the outer periphery of the ring-shaped rings 14, 14. Water spout 1 communicating with 16 and spouting water
A plurality of columns 7 and 17 (two columns in the figure) are provided. A rectifying member 15 is provided between the annular ring 14 on the upstream side and the air supply port 18 to deflect the air flow toward the inner wall surface of the water / air mixing chamber 20.

In the snowmaking nozzle having the above structure, the nozzle 1
The pressurized water 11 supplied to the water supply port 19 of No. 0 flows into the water chamber 16, and the annular rings 14 and 1 from the water ejection ports 17 and 17.
4 is injected toward the outer circumference. Annular ring 14,1
Since the cross section of 4 is a semicircular shape toward the water jet outlets 17, 17, the water that has collided with the outer surfaces of the annular rings 14, 14 scatters like a liquid film.

On the other hand, the pressurized air 12 supplied from the air supply port 18 of the nozzle 10 is deflected to the inner wall surface side of the water / air mixing chamber 20 by the rectifying member 15 to become a high-speed air flow, and the annular rings 14, 14 are formed. The water scattered in the form of a liquid is sheared. The liquid film-shaped water has a greater effect of atomization than the case of simply shearing the water jetted from the water jet outlets 17 by the shearing action of air. Therefore, in the downstream of the water / air mixing chamber 20, atomized water (water droplets) is carried by the high-speed air flow and jetted from the tip of the nozzle 10.

In the above embodiment, an example in which a plurality of water jet outlets 17 are provided in two rows has been described, but it goes without saying that it may be a single row or three or more rows. Further, the water ejection port 17 does not have to be a round hole, and may be, for example, a slit shape.

FIG. 2 is a view showing another structure of the snow making nozzle of the artificial snowfall machine of the present invention. As shown in the figure, this snowmaking nozzle has an annular water chamber 16 on the outer periphery of a predetermined position of the nozzle 10 whose tip is narrowed, and a water supply port 19 is provided in the water chamber 16. Inside the nozzle 10 where the water chamber 16 is located, annular rings 14, 14 are formed in a direction substantially orthogonal to the axial direction.
A plurality of rows (two rows in the figure) of water jet outlets 17, 17 for jetting water are provided on the wall surface of the nozzle 10 located on the outer circumference of the annular rings 14, 14. A rectifying member 15 is provided between the annular ring 14 on the upstream side and the air supply port 18 to deflect the air flow toward the inner wall surface of the nozzle 10.

In the snowmaking nozzle having the above structure, the nozzle 1
The pressurized water 11 supplied to the water supply port 19 of 0 flows into the water chamber 16 and is jetted from the water jet ports 17 and 17, and the water that collides with the outer surfaces of the annular rings 14 and 14 scatters in the form of a liquid film. . On the other hand, the pressurized air 12 supplied from the air supply port 18 of the nozzle 10 is deflected to the inner wall surface side of the nozzle 10 by the rectifying member 15 to become a high-speed air flow, and the annular rings 14, 14
The water scattered in the form of a liquid is sheared. Water that has been shattered and atomized (water droplets) is carried by a high-speed air stream, and is jetted at high speed from the tip of the nozzle 10 that is narrowed down.

The snow-making nozzle shown in FIG. 2 is a technique of forming water in the form of a film by the annular rings 14 and 14, which is the essential point of the present invention.
This is a combination of the technologies for high-speed injection described in FIG. 4, and it is possible to take advantage of the features of both.

FIG. 3 is a view showing another structure of the snowmaking nozzle of the artificial snowfall machine of the present invention. As shown in the figure, this snowmaking nozzle has an annular water chamber 16 on the outer periphery of a predetermined position of the nozzle 10 whose tip is narrowed, and a water supply port 19 is provided in the water chamber 16. Inside the nozzle 10 where the water chamber 16 is located, annular rings 14, 14 are formed in a direction substantially orthogonal to the axial direction.
A plurality of rows (two rows in the figure) of water jet outlets 17, 17 for jetting water are provided on the wall surface of the nozzle 10 located on the outer circumference of the annular rings 14, 14. A collision plate 13 is provided between the annular ring 14 on the downstream side and the tip of the nozzle.

In the snowmaking nozzle having the above structure, the nozzle 1
The pressurized water 11 supplied to the water supply port 19 of 0 flows into the water chamber 16 and is jetted from the water jet ports 17 and 17, and the water that collides with the outer surfaces of the annular rings 14 and 14 scatters in the form of a liquid film. . On the other hand, the pressurized air 12 supplied from the air supply port 18 of the nozzle 10 shears the water scattered in the form of a liquid film by the annular rings 14, 14, and the sheared and atomized water is the collision plate 1.
It collides with 3 and is further atomized and scattered. The scattered water droplets are carried by the high-speed air flow and jetted from the tip of the nozzle 10 at high speed.

The snow-making nozzle shown in FIG. 3 is a technique of forming water in the form of a film by the annular rings 14 and 14, which is the essential point of the present invention.
The technique of colliding the water with the collision plate 13 described in FIG. 5 and the technique of atomizing by spraying at a higher speed are combined, and each characteristic can be utilized.

In the examples shown in FIGS. 2 and 3, a plurality of water jet outlets 17 are provided in two rows, but it goes without saying that they may be provided in a single row or in three or more rows. In addition, water spout 1
7 does not have to be a round hole, and may be, for example, a slit shape.

[0021]

As described above, according to the present invention, the following excellent effects can be obtained. (1) In a gun-type artificial snow machine that consumes a large amount of pressurized air, it is possible to make efficient and high-quality snow because the air is effectively used and atomization of water, which is the first step of snow making, is performed. it can. (2) Further, since the mechanism is extremely simple, there is no problem that the inside freezes due to problems such as pooling and draining of water during or after operation.

[Brief description of drawings]

1A and 1B are views showing a structure of a snowmaking nozzle of an artificial snowfall machine of the present invention, wherein FIG. 1A is a longitudinal sectional view and FIG. 1B is FIG. 1A.
FIG.

FIG. 2 is a view showing another structure of the snowmaking nozzle of the artificial snowfall machine of the present invention.

FIG. 3 is a view showing another structure of the snow making nozzle of the artificial snowfall machine of the present invention.

FIG. 4 is a diagram showing a structural example of a snowmaking nozzle of a conventional artificial snowfall machine.

FIG. 5 is a diagram showing a structural example of a snowmaking nozzle of a conventional artificial snowfall machine.

FIG. 6 is a diagram showing a structural example of a snowmaking nozzle of a conventional artificial snowfall machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Nozzle 11 Pressurized water 12 Pressurized air 13 Collision plate 14 Annular ring 15 Straightening member 16 Water chamber 17 Water injection port 18 Air supply port 19 Water supply port

Claims (1)

[Claims] 1. Injecting pressurized water and air into a nozzle to mix them, cooling water atomized by adiabatic expansion of air, and jetting the atomized water and air from the nozzle tip. In a snowmaking nozzle of an artificial snowmaking machine that snows, an annular ring is provided in the vicinity of a position where water and air are mixed in the nozzle in a direction substantially orthogonal to the nozzle axial direction, and water is jetted to the outer periphery of the annular ring. A plurality of water jets are provided, and water is jetted from the water jets to collide with the annular ring to form water films on both sides of the annular ring, and the air is caused to flow from the nozzle axial direction to the water film. A snowmaking nozzle for an artificial snowfall, wherein the water film is sheared and atomized.