JPH06159883A - Method for scattering snow and crushed ice with air jet - Google Patents

Abstract

PURPOSE:To easyly and uniformly scatter snow or crushed ice in the case that snow or crushed ice is scattered on a slope in a skiing fieled to adjust condition at the slope, or to scatterse snow or crushed ice above agricultural products so as to store them at an icing temperature. CONSTITUTION:A discharging pipe having an ejection nozzle for ejecting a high pressure air jet toward a discharging port is connected to a flow feeding passage pipe for sucking snow or crushed ice. An opening end of the flow feeding passage pipe is applied as a suction port to the snow and crushed ice and further a discharging port of the discharging pipe is directed toward a place for scatting. A negative pressure generated by the air jet ejected from the nozzle into the discharging pipe is acted upon the flow feeding passage pipe, the snow and crushed ice to be scattered are sucked from the suction port of the flow feeding passage pipe into the flow feeding passage pipe under this negative pressure and then flow fed to the discharging pipe, the snow and ice are placed in the air jet and well released from the discharging port of the discharging pipe and scattered.

Description

Detailed Description of the Invention

[00001]

BACKGROUND OF THE INVENTION The present invention particularly applies to snow and crushed ice such as when snow and crushed ice are sprinkled on the slopes of a ski resort, or when snow and crushed ice are sprinkled on the crop to store it at an ice temperature. The present invention relates to a spreading method.

[0002]

2. Description of the Related Art For example, there is a shortage of snow on the slopes at the beginning and the end of the ski season, and in order to adjust the condition of the slopes during the season, it is necessary to sprinkle snow or ice on the slopes. There is. In some regions, snow and ice are sprinkled on farm products when they are stored at ice temperatures.

Here, a method generally used for sprinkling snow or crushed ice onto a slope or an agricultural crop is as follows.
Hand tools such as a scoop, snow from other places by mobility such as a bulldozer, or finely crushed ice chunks are carried by conveyors or trucks onto the slopes or crops and transferred, using shovels or scoops. It is a leveling method.

[0004]

In the method of spraying snow or crushed ice on a slope or a crop as described above, the snow or crushed ice carried on the slope or crop by a conveyor or a truck is temporarily placed in one place. After that, there is a problem that it needs to be leveled with a shovel or scoop over a wide range, which is troublesome, inefficient, requires a lot of manpower and time, and is costly. Moreover, when collecting snow from other places, or carrying finely crushed ice blocks on a slope or a crop by a conveyor or a truck, and when smoothing the snow or crushed ice transferred to the slope with a shovel or scoop. There is also a problem that it melts easily and the yield becomes poor. Furthermore,
There is also a problem that it is difficult to evenly spread it evenly over the slopes and crops because of the experience and feeling of the worker.

Therefore, the present invention has been proposed in view of the above problems, and an object thereof is to provide a method for spreading a large amount of snow or crushed ice over a wide area easily and in a short time. It is a thing.

[0006]

In order to achieve the above object, the method of spraying snow and crushed ice by an air jet according to the present invention is continuous with a flow passage pipe for sucking and sending snow and crushed ice. Then, the discharge pipe is connected, a high-pressure air jet is jetted toward the discharge port of the discharge pipe, a negative pressure is formed in the discharge pipe on the side of the flow passage pipe, and the negative pressure causes the inside of the flow pipe to be discharged. A negative pressure is applied, and snow and crushed ice are sucked from the suction port of the flow passage pipe facing the snow and crushed ice for spraying, and the inside of the snow suction passage pipe is sent toward the discharge pipe. It is characterized in that snow, crushed ice, etc. are pressure-fed outward from the discharge port of the discharge pipe and sprinkled.

[0007]

According to the method of spraying snow, ice breaks, etc. by the air jet of the present invention, when a high-pressure air jet is jetted into the discharge pipe, the air jet is spread to the inside of the discharge pipe and a jet flow is formed. Negative pressure is generated in the discharge pipe on the side of the flow passage pipe from the portion that spreads out in the discharge pipe. Then, this negative pressure sucks snow and crushed ice from the suction port of the discharge passage pipe exposed to the snow and crushed ice for spraying, and the sucked snow and crushed ice is sent through the discharge passage pipe and discharged. Sent to a pipe.

Here, the drive source for sucking snow and crushed ice and sending it through the inside of the flow passage pipe is a negative pressure, and since this negative pressure is in an adiabatically expanded state, the snow of the flow passage pipe and This negative pressure deprives the heat of raising the temperature of the crushed ice or the like due to the energy when the crushed ice is sent, so that melting is prevented. Then, the snow, the crushed ice, etc. sent to the discharge pipe are taken into the air jet flow jetted to the discharge pipe, and are expelled to the outside from the discharge port by the air jet flow. By the way, according to the method for spraying snow and crushed ice with the air jet of the present invention, the speed of the air jet becomes 200 meters per second or more even when the injection pressure of the air jet is set to a relatively low pressure of 0.5 kg. It was possible to spray snow and crushed ice about tens of meters away from the exit.

When snow, crushed ice, etc. sent at a negative pressure are taken into the air jet flow of the discharge pipe, the negative pressure changes to a positive pressure, and adiabatic compression occurs and the temperature rises. Since it is released from the outlet to the outside, the heat for raising the temperature of the snow and crushed ice is radiated to the outside and cooled, and the snow and crushed ice do not melt.

[00010]

EXAMPLE An example of a method for spraying snow and crushed ice with an air jet according to the present invention will be described below.

<Embodiment 1> The method for spraying snow and crushed ice with an air jet according to this embodiment is for spraying snow on the slope of a ski resort to adjust the condition. First, outside the slope, For example, pipe a flow passage pipe over a place where there is snow such as a swamp or a valley (snow suction place) and near the ski slope, and use one end of this flow passage pipe as a suction port for the snow suction place. While facing and opening, the discharge pipe is connected to the other end opening portion to form a snow passage in the flow passage pipe and the discharge pipe.

Next, the connecting portion between the flow passage pipe and the discharge pipe is bent, and high-pressure air from a high-pressure air supply source composed of, for example, a plunger pump, is bent in the bent portion. The ejection nozzle is arranged so that the ejection direction is aligned with the axial direction of the ejection pipe and the ejection nozzle is directed toward the ejection port without advancing inside. Then, when the high-pressure air pressurized by the high-pressure air supply source injects a high-pressure air jet from the injection nozzle into the discharge pipe, this air jet spreads in the discharge pipe to form a jet flow, and the air jet fills the discharge pipe. Negative pressure is generated in the discharge pipe on the side of the flow passage pipe from the portion widened to. The caliber of the snow delivery path is set so that the air jets injected from the injection nozzles spread to the full extent in the delivery path and a negative pressure is formed from this part to the delivery passage pipe side. , The diameter of the injection nozzle, the pressure of the air supply source, the snow quality, etc. are taken into consideration.

The negative pressure generated in the discharge pipe acts on the snow flow path, and contains a large amount of air from the suction port of the flow path pipe facing the snow in the snow suction place such as a valley or a valley. A large amount of light snow is sucked and sent to the discharge pipe through the flow path. At this time, the drive source for sucking snow and crushed ice and sending it through the sending passage pipe is a negative pressure, and since this negative pressure is adiabatically expanded, the snow in the sending passage pipe is sent. Since the energy generated at this time, for example, the heat generated by friction when coming into contact with the inner wall of the flow passage pipe is absorbed by this negative pressure, the snow does not melt.

Thus, the snow sucked by the negative pressure from the flow passage pipe to the discharge pipe is taken into the air jet flow injected into the discharge pipe and is expelled to the outside from the discharge port by the air jet flow. However, when snow is taken into the air jet flow of the discharge pipe in the discharge pipe, the negative pressure changes to a positive pressure, and the state is adiabatic compression, so it tries to raise the temperature, but there is no time for the snow to melt, and immediately outside the discharge port. The heat that tries to melt the snow is dissipated to the outside air and cooled. Therefore, the snow that is ejected from the discharge port vigorously does not melt, it is possible to spread the snow evenly over a wide range of the slope, and the condition of the slope can be adjusted in a short time. .

<Example 2> The method of spraying snow and crushed ice with an air jet according to this example preserves agricultural products for a long period of time while keeping them fresh.
It is used when performing a so-called "ice temperature storage method" of maintaining the temperature around.

That is, after the agricultural products are spread on the floor or the ground almost all over, the agricultural products are spread by a truck or the like where snow is temporarily placed or where ice breaking is temporarily placed (snow suction place). Pipe the flow passage pipe near the floor or the ground, and open one end of the flow passage pipe as a suction port facing the snow suction place and connect the discharge pipe to the other end opening. A snow flow path is formed in the delivery pipe and the discharge pipe.

Next, when the connecting portion between the flow passage pipe and the discharge pipe is bent in the same manner as in the first embodiment, a high pressure air supply source composed of a plunger pump is connected to the bent portion. The injection nozzle is arranged so that the injection direction is aligned with the axial center direction of the discharge pipe and the discharge port is directed without exposing the high-pressure air to the above-mentioned snow flow path. On the other hand, when the connecting portion between the flow passage pipe and the discharge pipe is made straight without bending, the injection nozzle may be obliquely arranged as proposed by the applicant in Japanese Patent Publication No. 63-25200. , So that the air jet is ejected in the form of a conical film that converges near the discharge port. In this way, when the high-pressure air pressurized by the high-pressure air supply source injects a high-pressure air jet from the injection nozzle into the discharge pipe, this air jet spreads in the discharge pipe to form a jet flow, and the air jet fills the discharge pipe. Negative pressure is generated in the discharge pipe on the side of the flow passage pipe from the portion widened to.

Negative pressure generated in the discharge pipe acts on the snow flow path, and a large amount of light snow and ice crushed in the snow suction place is sucked from the suction port of the flow passage pipe. The snow and crushed ice are sent to the discharge pipe through the flow path, and like the first embodiment, the snow and the crushed ice are vigorously discharged over a wide range from the discharge port to the agricultural products without melting. Therefore, snow and crushed ice can be sprinkled evenly on the crops, and the crops can be stored at a good ice temperature.

[00019]

According to the method for spraying snow and crushed ice by the air jet according to the present invention, a negative pressure is formed by the high pressure air jet injected into the discharge pipe, and the snow and crushed ice are sent by this negative pressure. Since it is sucked into the passage pipe and is ejected vigorously outward from the discharge pipe by this high-pressure air jet to be sprinkled, it is possible to instantly sprinkle snow and crushed ice from spraying to sprinkling. Therefore, the worker only has to hold the discharge pipe in a sprinkling direction, and has an advantage that it is possible to sprinkle snow, crushed ice, etc. easily and inexpensively with a small number of people without requiring labor.

Further, when the snow, crushed ice, etc. discharged from the discharge pipe are sent through the flow passage pipe, the negative pressure absorbs the energy of the energy when the snow and crushed ice are sent through the flow passage pipe. , When it is discharged from the discharge pipe, the heat that tries to raise the temperature by the pressure of the air jet flow is discharged to the outside air temperature and is cooled. Since it is sprinkled from the discharge pipe without melting, the effective utilization rate of snow and crushed ice is high, and so-called yield is also improved.

Further, snow, crushed ice, etc. sent to the discharge pipe are taken into the air jet flow jetted to the discharge pipe and expelled from the discharge port by the air jet flow vigorously to a far distance. There is also an advantage that it is possible to spray snow and crushed ice evenly over a wide range simply by controlling the spraying direction of the discharge pipe while looking at the whole without relying on experience and feeling.

In a heavy snowfall area, if the suction port of the flow passage pipe is made to face the snow accumulated on the roof of a building and sucked, it can be used for snow removal. is there.

Claims (2)

[Claims] 1. A delivery pipe is continuously connected to a delivery passage pipe for sucking and delivering snow and crushed ice, and a high-pressure air jet is jetted toward the delivery port of the delivery pipe to deliver it. A negative pressure is formed in the discharge pipe on the side of the passage pipe, and the negative pressure is used to make the inside of the delivery passage pipe negative. At the same time, snow and crushed ice are introduced from the inlet of the delivery passage pipe exposed to the snow and crushed ice for spreading. Air is sent to the discharge pipe through the snow suction passage pipe, and the air jet blows snow and crushed ice outward from the discharge port of the discharge pipe to spread the air. A method of spraying snow and crushed ice with a jet. 2. The spraying of snow, crushed ice, etc. by an air jet according to claim 1, wherein a high-pressure air jet is jetted toward the discharge pipe at a plurality of locations along the flow passage pipe. Method.