JP3074958U - Nozzle for snow machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] A fog fluid can be diffused and discharged in a wide range in the front-rear and left-right directions without unevenness. Provide a snow machine nozzle that can be used. SOLUTION: Discharge means 5 of a snowfall nozzle is provided at a conical tip surface portion 41 having a flat portion 41a at the center, and at left and right ends within the surface of the tip surface portion 41 and sandwiching the flat portion 41a. Large-diameter discharge holes 51, 51a, lower-side small-diameter discharge holes 53, 53a below each of the large-diameter discharge holes and provided with the center of the holes displaced inward, and large-diameter discharge holes. It is characterized by comprising upper small-diameter discharge holes 52 and 52a arranged on the upper side and displaced from the lower small-diameter discharge hole at the center of the hole inward.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention relates to a snowfall nozzle.

[0002]

[Prior art]

 FIG. 6 is an explanatory perspective view showing a conventional snowfall nozzle. This snowfall nozzle has a compressed air supply port 82 at the base end and a discharge hole 87 at the tip end of a cylindrical nozzle body 81 provided with a high-pressure water supply port 83 at the lower center of the length. The nozzle tip taper 86 is provided. In addition, a high-pressure water ejection hole 85 communicating with the high-pressure water supply port 83 is opened in the nozzle body 81, and water spray pins 84 are provided inside the nozzle body 81 so as to protrude inward in correspondence with the high-pressure water ejection hole 85. ing.

In use, a hose for compressed air is connected to a compressed air supply port 82, and a hose for high pressure water is connected to a high pressure water supply port 83. In this state, by opening the valves at the ends of the hoses, the high-pressure water N and the compressed air M are supplied to the nozzle body 81, respectively.

The high-pressure water N flowing into the nozzle body 81 collides with the shaft tip surface (flat surface) of the water spray pin 84 and diffuses, and at the same time, the compressed air M supplied from the air supply port 82 diffuses. The water droplets formed into fine particles are extruded toward the nozzle tip.

[0005] As a result, the micronized water droplets and the compressed air are mixed to form a mist-like fluid (fog fluid), which proceeds to the nozzle tip taper (chamber) 86 and discharges outward from the discharge hole 87. . The fog fluid diffused into the atmosphere with low outside air temperature is converted into artificial snow by the efficient transfer of heat from fine particles (water particles) to the sub-zero temperature outside air, and the snow is deposited on the ground (piste).

[0006]

[Problems to be solved by the invention]

 Conventional snowfall nozzles have a configuration in which only a single large discharge hole is used as the discharge means (the configuration shown in FIG. 6), and a configuration in which a plurality of discharge holes are arranged in a circle (see FIG. 6). (Not shown).

In the former configuration having a single discharge hole, the particles in the central part of the mist fluid become large and snow concentrates in one place, so that snow is accumulated in a small hill shape with a wide base. As a result, the surrounding snow becomes dry snow, but the heat exchange efficiency is poor in the fog-concentrated area, and it is in a state close to “Mizore”. In other words, there is a disadvantage in that uniform snow quality cannot be obtained without being able to produce uneven snow conditions depending on the location.

On the other hand, in the latter configuration having a plurality of discharge holes, the mist fluid can be discharged at a wider angle than the former configuration, but the diameters of the discharge holes are all the same, and Since the heart is parallel to the center of the nozzle axis, snow accumulates densely at a certain flight distance, resulting in uneven snow quality.

Further, in the conventional snowfall nozzle, as described above, the diffusion range of the mist fluid is relatively narrow, and the mist fluid tends to be dense. For this reason, in order to prevent the snow quality in the dense part from becoming “slant”, a certain amount of air is required to diffuse sufficiently and improve the heat exchange efficiency. The disadvantage was that the rate of air consumption was very high to carry out the snowfall.

[0010] This invention solves the above-described problems, sets a large difference in the diameter of the plurality of discharge holes, and arranges the center of each of the discharge holes so as to be displaced so that the mist fluid is displaced. It is an object of the present invention to provide a snowfall nozzle capable of uniformly dispersing and discharging a wide area in the front-rear and left-right directions without causing unevenness in the snow quality evenly in the snow and reducing the air consumption. And

[0011]

Means for Solving the Problems To achieve this object, the snowfall nozzle of the present invention has the following configuration. The snowfall nozzle includes a nozzle body having a high-pressure water supply port and a compressed air supply port, atomizing means for mixing and atomizing the supplied gas and liquid, and atomizing means generated by the atomizing means. A discharge means having a discharge hole for discharging a fluid, wherein the discharge means sandwiches the flat portion in the plane of the conical tip surface portion having a flat central portion. A large-diameter discharge hole provided at each of the left and right ends; a lower small-diameter discharge hole provided below each of the large-diameter discharge holes so that the center of the hole is displaced inward each; It is characterized by comprising an upper small-diameter discharge hole disposed above the discharge hole and arranged with the center of the hole displaced inward from the lower small-diameter discharge hole.

In the snowfall nozzle having such a configuration, the fine mist fluid (misty fluid) generated by the atomizing means can be uniformly spread over a wide area by the plurality of discharge holes having different snow-covered areas. It is injected. In other words, the two large-diameter discharge holes, which are located at the left and right ends on the horizontal center line of the tip surface, respectively, allow the mist fluid to fly at a wide angle with a sufficient flight distance, resulting in a distant wide area, that is, a long flight distance zone. Wear snow evenly.

Further, the lower small-diameter discharge holes are arranged at positions close to the large-diameter discharge holes at the left and right ends, respectively. Therefore, about half of the mist fluid discharged from the lower small-diameter discharge hole is attracted to a large amount of fluid radiated from the large-diameter discharge holes at the left and right ends, and is moved to the mid-flying distance zone, which is near both ends of the long-distance zone. While snowing, the other half snows in the short flight zone in front of the nozzle.

Next, the upper small-diameter discharge hole is located at the center of the hole at the center, and is set as a medium-range gun that has a longer flight distance than the lower discharge hole. In other words, while the small-diameter discharge hole has the most upward discharge angle, the mist fluid discharged from the small-diameter discharge hole receives large air resistance, and the amount of heat is efficiently transferred from water particles to the atmosphere, and snow is reduced. Proceed quickly. For this reason, the flight distance is not as large as that of the large-diameter hole, and the medium flight distance region is obtained. Accordingly, the mist fluid discharged from the upper small-diameter discharge hole reaches the middle flight distance zone in the front (front) area of the nozzle, which is between the single flight distance zone and the long flight distance zone.

[0015] Thus, the mist fluid is diffused in a wide range in the front-rear and left-right directions in front of the nozzle and radiated uniformly. Therefore, since the fog fluid does not concentrate (densify) at a specific location, the snow condition at the location cannot be uneven, and the heat exchange efficiency is high, so that the uniformity of the high quality snow can be ensured and the predetermined amount of snow can be secured. This results in very low air consumption for snowfall.

[0016]

[Embodiment of the invention]

 Hereinafter, a specific embodiment of the snowfall nozzle according to the present invention will be described with reference to the drawings.

FIG. 1 is an overall perspective view showing a snowfall nozzle, and FIG. 2 is a sectional view. The snowfall nozzle is provided corresponding to a nozzle body 1 having a compressed air supply port 11, a high-pressure water flow path tube 2 internally provided in the nozzle body 1, and a distal end of the high-pressure water flow path tube 2. The atomization chamber cylinder 4 is provided at the tip of the nozzle body 1 and the discharge means 5 is provided at the tip 41 of the atomization chamber cylinder.

As shown in FIG. 2, the nozzle body 1 is made of, for example, metal or hard plastic, and is formed in a cylindrical body having both ends opened. A compressed air supply port (cylinder port) 11 is provided in a protruding manner on a lower peripheral surface of a substantially central portion of the axial length of the nozzle body 1, and the supply port 11 communicates with the inside of the nozzle body 1. I have.

The high-pressure water flow channel cylinder 2 is a double-ended tube having a flow channel 22 having a large diameter at the base end and a small diameter at the front end. The high-pressure water flow path tube portion 2 is fitted in the nozzle body 1 and fixed (screwed) with the large-diameter high-pressure water supply port portion 21 at the base end slightly protruding from the base end of the nozzle body 1. Have been.

The compressed air flow path tube 3 includes an air guide 31 and a water flow coating 32. The cylindrical portion 3 has a hole (air guide portion) 31 having a large diameter on the base end side and corresponding to the outer shape of the distal end tapered portion 23 of the high-pressure water flow path tube 2, and a small-diameter hole on the distal end side communicating with the hole. (Water flow coating portion 32).

The distal end taper portion 23 is fitted inside the air guide portion 31 with a gap. In this inner fitting state, the distal end surface of the distal taper portion 23 is located at a position corresponding to the water flow coating portion (small-diameter hole portion) 32.

The atomization chamber cylinder 4 is a cylindrical body having a bottom opening at the base end, and the base end of the cylinder is fixed (screwed) to the front end opening of the nozzle body 1. A columnar watering pin 42 having a certain length is provided in the bottom plate of the chamber cylinder 4, that is, at the center of the inner surface of the front end surface portion 41, inwardly.

The distal end surface of the water sprinkling pin 42 is located near the hole end surface of the water flow coating portion 32. That is, the fluid flowing out of the water flow covering portion 32 (the fluid in which the compressed air covers the high-pressure water in a cylindrical shape), particularly the high-pressure water, collides with the tip end surface of the water spray pin 42. Then, all of the high-pressure water that has collided bends the course approximately 90 degrees and diffuses radially. It is set so that the compressed air intersects the diffused thin-film water flow more vigorously in the horizontal direction or diagonally behind, and gas-liquid is mixed to form an atomized fluid.

The high-pressure water flow channel cylinder 2, the compressed air flow channel cylinder 3, and the atomizing chamber 4 constitute a gas-liquid mixing / atomizing means A of a nozzle.

As shown in FIG. 1 and FIG. 3, the discharge means 5 is arranged irregularly (irregularly) in the surface of the distal end surface portion 41 constituting the bottom surface of the atomizing chamber cylinder 4. And a plurality of discharge holes.

The distal end surface portion 41 is formed in a conical shape, and has a flat (flat portion) 41 a at the center of the outer surface. In the embodiment, as shown in FIG. 3, the discharge holes opened in the surface of the front end face portion 41 are large-diameter discharge holes 51, 51a, lower discharge holes 53, 53a, and upper discharge holes 52, 52a. It is composed of

The large-diameter discharge holes 51 and 51a are large-diameter circular holes with the center of the holes being V and V1, respectively, and are located in the plane of the front end surface portion 41 and have both left and right ends sandwiching the central flat portion 41a. It is arranged in a distribution form. The diameter of the large-diameter discharge hole in the embodiment is set to 8.4 mm.

The lower small-diameter discharge holes 53 and 53a are small-diameter round holes whose centers are X and X1, respectively. The diameter of the small-diameter discharge hole in the embodiment is 5.0 mm. That is, it is 60% of the diameter of the large-diameter discharge hole 51 (51a), and is 35% larger than the large-diameter discharge hole in comparison of the cross-sectional area. The lower left and right small-diameter discharge holes 53 and 53a are located below the left and right large-diameter discharge holes 51 (51a), and the center of the holes is displaced inward.

That is, it is arranged at a position having a 50 degree angle with respect to a virtual horizontal center line (a virtual line connecting the hole centers V-V1) connecting the left and right large diameter holes 51 (51a). Accordingly, the lower left and right small holes 53 and 53a are opened at an angle of 80 degrees.

Further, the upper small-diameter discharge holes 52 and 52a are set to have a diameter of 5.0 mm in the embodiment, and are above the large-diameter discharge holes 51 (51a) at the left and right ends, and The small diameter holes 53 and 53a are arranged so as to be displaced inward from the center of the holes.

That is, it is arranged at a position 60 degrees wider than the virtual line connecting V-V 1. Therefore, the upper left and right small-diameter discharge holes 52 and 52a are opened at an angle of 60 degrees.

The large-diameter discharge holes 51 and 51a, the lower small-diameter discharge holes 53 and 53a, and the upper small-diameter discharge holes 52 and 52a are all formed in the surface of the conical tip surface 41. Accordingly, as shown in the cross-sectional view of FIG. 2, the center of all the discharge holes is set to be displaced outward by about 15 degrees with respect to the axial center Y of the nozzle body 1.

In the snowfall nozzle having such a configuration, snowfall is performed as follows. As shown in FIG. 5, the snowfall nozzle B is attached to the rising attachment portion 65a of the sled body 65 which is easily movable. In this state, the high-pressure water hose 63 of the hydrant 62 disposed at the side end of the slope 61 is connected to the high-pressure water supply port 21, and the compressed air hose 64 is connected to the compressed air supply port 11. Let it.

Here, by opening each valve of the hydrant 62, the pressure water N and the compressed air M flow into the nozzle body 1 as shown in FIG. In the process of flowing the high-pressure water N through the high-pressure water flow path tube 2, the flow path 22 is narrowed, so that the high-pressure water flows out of the tapered tip 23 as a high-speed water flow.

On the other hand, the compressed air M circulates around the outer periphery of the high-pressure water flow path tube 2 from the compressed air supply port 11 and passes through the narrow air guide portion 31 to be a high-speed airflow. Further, in the water flow coating portion 32, the high-speed flow M cylindrically covers the surface of the high-speed water flow N spouted from the tapered portion distal end portion 23.

The so-called cylindrical fluid (high-pressure water and compressed air) passing through the water flow coating section 32 is still completely separated at this point. This high-pressure water collides with the tip surface of the water sprinkling pin 42. All of the colliding water bends about 90 degrees and diverges radially. Then, the compressed air intersects the diffused thin film-like water flow more vigorously in the lateral direction or obliquely behind, and gas-liquid is mixed to form an atomized fluid.

In particular, since the pressure inside the atomizing chamber cylinder 4 is low, the inflowing air intersects with the water flow which is swelled and diffused radially, so that the atomized air becomes more finely mist-like (fog fluid). Thus, the ink is discharged to the outside (in the atmosphere) from the plurality of discharge holes of the front end surface portion 41. This mist-like fluid (mist fluid) expands due to the pressure difference between the front and rear of the discharge hole, and further becomes fine mist of particles.

The mist fluid discharged from each discharge hole snows on the zone shown in FIG. As shown in FIG. 3, the large-diameter discharge hole 51 on the left and the right large-diameter discharge hole 51a with the center of the holes being V and V1, respectively, allows the mist fluid to fly at a wide flight angle with a sufficient flight distance. Therefore, the fog fluid uniformly spreads snow over a wide distance. The left and right large-diameter discharge holes 51, 51a function as a wide-angle so-called long-range gun, and as shown in FIG. 4, snow accumulates in the farthest left and right large areas, that is, the long-distance zones VZ and V1Z. .

Further, the lower left and right small-diameter discharge holes 53 and 53a with the hole centers at X and X1 are arranged at positions close to the large-diameter discharge holes 51 and 51a at both left and right ends, respectively. . Therefore, about half of the mist fluid discharged from the lower small-diameter discharge holes 53 and 53a is attracted to a large amount of fluid ejected from the left and right large-diameter discharge holes, and is located at both ends of the long distance zone (VZ, V1Z). While snow falls in certain mid-flying distance zones (X'Z) and (X'1Z), the other half snows in short flying distance zones (XZ) and (X1Z) in front of the nozzle.

Next, the upper small-diameter discharge holes 52, 52 a having the hole centers of W and W 1 are arranged at the hole positions closest to the center, and have a longer flight distance than the lower discharge holes 53. Set to medium range gun. In other words, while the upper small-diameter discharge hole 52 (52a) has the highest upward discharge angle, the mist fluid discharged from the small-diameter discharge hole receives a large air resistance and efficiently transfers heat from water particles to the atmosphere. It shifts and snowing progresses quickly. For this reason, the flight distance is not as large as that of the large-diameter discharge hole, and the medium flight distance region is obtained. Therefore, the mist fluid discharged from the upper left and right small-diameter discharge holes 53 and 52a is located in the front (front) area of the nozzle and in the short flight zone (XZ / X1Z) and the long flight zone (VZ · V1Z) and snowfall in the medium flight distance zone (WZ / W1Z).

Thus, the mist fluid is diffused in a wide range in the front-rear and left-right directions in front of the nozzle and radiated evenly. Therefore, the fog fluid does not concentrate (densify) at a specific location, so there is no unevenness in the snow condition depending on the location, and since the heat exchange efficiency is high, good uniformity of snow quality can be ensured. Very low air consumption is required for constant snowfall.

In the embodiment, an example in which the upper small-diameter discharge holes 52 (52a) are provided on the left and right sides has been described. However, if the amount of snowfall can be small, the upper small-diameter discharge holes 52 (52a) can be used. May be provided only once.

[0043]

[Effect of the invention]

 In the present invention, as described above, the discharge means includes a large diameter left and right discharge hole for a long flight zone covering a distant wide area, and a narrow front area and an intermediate area in the vicinity of the conical tip surface. The lower small-diameter discharge hole for the short and medium flight distance zone covering both end ranges of the above, and the upper side for the medium flight distance zone which covers the front area and the intermediate area between the long and short flight distance zones Since the nozzles are composed of the small-diameter discharge holes, the mist fluid discharged from the plurality of irregularly arranged discharge holes diffuses in a wide range in the front-rear and left-right directions in front of the nozzles and is uniformly radiated. Therefore, the fog fluid does not concentrate (densify) at a specific location, so there is no unevenness in the snow condition depending on the location, and since the heat exchange efficiency is good, the uniformity of good snow quality can be ensured and the predetermined amount It has an excellent effect of achieving the purpose of the invention, such as extremely low air consumption for snowfall.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a snowfall nozzle.

FIG. 2 is a sectional view showing a snowfall nozzle.

FIG. 3 is a front view of a tip end surface portion showing an arrangement configuration of ejection holes according to the embodiment.

FIG. 4 is an explanatory view of a snow-covered state showing a snow-covered area of a mist fluid discharged from a plurality of discharge holes.

FIG. 5 is a perspective view showing a state of snowfall using the snowfall nozzle of the embodiment.

FIG. 6 is an explanatory perspective view showing a conventional snowfall nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nozzle main body 2 High-pressure water flow path cylinder part 3 Compressed air flow path cylinder part 4 Atomization chamber cylinder 5 Discharge means A Gas-liquid mixing and atomization means 11 Compressed air supply port part 21 High pressure water supply port part 41 Tip surface part 51 Large diameter Discharge hole 51a Large-diameter discharge hole 52 Upper small-diameter discharge hole 52a Upper small-diameter discharge hole 53 Lower small-diameter discharge hole 53a Lower small-diameter discharge hole

Claims (3)

[Utility model registration claims] 1. A nozzle body having a high-pressure water supply port and a compressed air supply port, atomizing means for mixing supplied gas and liquid, and a discharge port for discharging atomized fluid generated by the atomizing means. In the snowfall nozzle comprising a discharge means, the discharge means has a conical tip surface portion having a flat central portion, and left and right ends sandwiching the flat portion in the plane of the tip surface portion, respectively. The disposed large-diameter discharge hole, the lower small-diameter discharge hole disposed below each of the large-diameter discharge holes, and the hole centers are respectively displaced inwardly, and above the large-diameter discharge hole. And an upper small-diameter discharge hole provided with the center of the hole displaced inward from the lower small-diameter discharge hole. 2. The snowfall nozzle according to claim 1, wherein the upper small-diameter discharge hole comprises two of a left small-diameter discharge hole and a right small-diameter discharge hole. 3. The nozzle for a snowfall machine according to claim 1, wherein the upper small-diameter discharge hole is constituted by only a single discharge hole.