JPH01271502A - Method for improving formability of snow - Google Patents

Abstract

PURPOSE:To prepare a snow block which excels in the stability of snow quality and the shape retention by tightly molding the dry snow which is humidified by the nozzles that are installed at the snow charging hopper of a snow making machine and spray water based on the snow quality. CONSTITUTION:The temperature, moisture, density, etc. of deposited snow 4 are measured by a measuring instrument 5 and are input to a control device 6. As various past set values are input to the control device 6, it controls a flow control valve 2 of spraying nozzles 3 comparing with the measured values and depending on the snow quality. The snow making machine 1, on the other hand, extrudes the snow collected in a hopper 11 to a cylindrical part 13 by a piston 12 and molds a snow block 7. When the snow block is molded, the dry snow is made easy to be molded by spraying water from the nozzles 3 installed above the hopper 11, whereby the quality of snow is stabilized and the shape retention of snow block after being molded can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for (a) improving the shaping properties of snow to make industrial applications less fragile.

(b) Prior Art In snowy regions, a powerful and highly efficient system is required as a means of removing snow that has accumulated in cities. lJ with conventional vehicles? In the division method, social capital is not accumulated.

Therefore, a system has been developed in which the snow accumulated in the alleys of the city is scraped up by a bulldozer or scraper, put into a single molding machine, and the molded snow is sent to a transport pipe and transported to a snow disposal base or snow storage area. Ta.

Snow forming machines are disclosed in Japanese Utility Model Publication No. 61-20100, Japanese Unexamined Utility Model Publication No. 54-108383, Japanese Utility Model Application Publication No. 59-76615, and the like. However, these methods do not take measures against snow that is difficult to form and maintain after being formed, such as dry powder snow.

Japanese Utility Model Publication No. 61-20100 suggests providing a water pipe at the tip of the molded piston. However, the purpose of this is to hydraulically transport the snow after it has been formed to the next process, not to mix water with the snow.

(c) The ill that the invention tried to solve! I tried to invent four books from the title book! ! 1! The object of the present invention is to provide a method for improving the formability of snow, which makes it possible to easily form dried snow, which has conventionally been considered difficult to form, in a snow forming machine, and stabilizes the shape retention after forming.

(d) Means for Solving the Problems The method for improving the formability of snow according to the present invention is based on the snow quality when introducing snow into the hopper of a snow forming machine in a snow pipe transportation system. The above problem is solved by means of controlling water to 1 fT1.

It is also possible to spray a mixed fluid of water and air onto the deposited snow. Furthermore, it is also possible to spray water or a mixed fluid of water and air into the conveying pipe for the introduced snow.

(e) Example A method for improving snow formability according to the present invention will be explained with reference to drawings. First, as shown in FIG. 1, in a snow pipe transportation system, when snow is charged into one hopper 11 of one mold n, water is sprayed onto the introduced snow based on the quality of the snow.

Water is supplied to the nozzles 3A and 3h through the flow control valve 2, and is sprayed from there toward the upper part of the hopper 11 and into the hopper 11.

The measuring device 5 measures the snow temperature,
Moisture, density, etc. are measured and sent to the control device 6. Control device 6
Then, each i11 setting value obtained based on past results is manually input, compared with the actual measurement value, and an opening control signal of the flow @ control valve 2 is sent to the valve 2.

In the snow forming machine 1, snow in a hopper 11 is pushed out into a cylindrical portion 13 by a piston 12 to form a snow mass 7. Snow 4 is charged into the hopper 11 by a charging device 8 such as a shovel. At this time, water is sprayed from a downward nozzle 3a and an upward nozzle 3b provided at the top of the hopper.

The snow and water mix, making it easier to shape.

The reason why the water is supplied by spraying from the nozzles 3a and 3b is that the amount of water required to form dry snow is only a relatively small amount, as it is sufficient to cover the surface of the snow particles with a water film that facilitates bonding of the snow particles. This is to evenly distribute a small amount of water.

The purpose of the downward nozzle 3a is to add moisture to the snow in the hopper 11. The upward nozzle 3b has the effect of efficiently mixing snow and water by applying water in a countercurrent manner to the snow 4 falling from the charging device 8.

In the example shown in FIG. 2, a mixed fluid of water and air is sprayed from the nozzle 30 onto the pipe 'lPt9.

1 Forming Ill pushes the snow in the hopper Ill into the cylindrical part 13 with the piston 12 to form the snow mass 7. Snow 4, which has been pneumatically conveyed through the pipe 9, is thrown into the hopper 11 after being changed direction by the r-shaped pipe 91. T
A nozzle 30 for spraying a mixed fluid of water and air is provided in the tube 91.

When the snow is put into the hopper 11, the snow is mixed with water, making it easier to shape the snow. Furthermore, since the mixed fluid of snow and air that is sprayed from the nozzle 30 accompanies suction of the mixed fluid of snow and air conveyed from the pipe line 9, the transport capacity from the pipe line 9 is increased. : It also has the effect of facilitating the directionality IQ of the mixed fluid.

Regarding the setting position of the nozzle, it is preferable to set the tip of the nozzle 30 at the intersection of the axis of the conduit 9 and the axis of the T-tube 91, as shown in FIG. This allows the accompanying suction effect to be maximized.

As shown in Figure 4, T-tube 9! Instead of, curved pipe 91
It is also effective to use a. In the case shown in Figure 3, the nozzle is exposed to the flow path of the mixed fluid of snow and air, so if the snow is highly adhesive, snow will adhere to the outer periphery of the nozzle and grow, clogging pipe 9. may cause. However, when the curved tube 91a shown in FIG. 4 is used, the intersection of the axis of the conduit 9 and the axis of the curved tube 91a becomes the inner wall of the curved tube 9a.

When the tip of the nozzle 30 is set at this intersection, the nozzle 30 is not exposed to the flow path of the mixed fluid of snow and air, so there is no risk of snow adhesion.Furthermore, by using the curve Irf91a, the wave path can be changed smoothly. Since it is done, the curved pipe 9
It is also possible to prevent snow from adhering to the inner wall of 1a.

An example of the shape of the water and air mixing part of the nozzle 30 is shown in the fifth example.
As shown in the figure, a double pipe 32 is installed in a part of the air supply pipe 31 (Fig. 3).
A water supply pipe 33 (FIG. 3) is connected to the double pipe 32. A plurality of pores 34 are provided in the inner tube in the area surrounded by the double tube 32.
will be established.

When a high-speed airflow is passed through the air supply pipe 31, water is sucked through the pores 34, and the water and air are mixed in the nozzle 30 and sprayed at the tip. Alternatively, a general nozzle structure may be used to mix water and air.

(F) Effects According to the method of the present invention, the quality of snow is stabilized, the shape of the snowpack after shaping is improved, and snow can be smoothly introduced through the pipe. .

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the snow molding method of the present invention. FIG. 2 is an explanatory diagram of another method of the present invention. Figures 3 and 4
The figure is an explanatory diagram of a method of spraying fluid into a snow transport pipe, and FIG. 5 is a cross-sectional view and a longitudinal cross-sectional view of a fluid spray nozzle. 1: Snow molding machine 2: Flow control valves 3a, 3b: Nozzle 4: Snow 5: Measuring device 7: Snow mass 8: Feeding device 9: Pipe line 11: Hopper 30: Nozzle (4 people in addition) Figure 3

Claims (3)

[Claims] (1) A method for improving the formability of snow in a snow pipe transportation system, which comprises spraying water on the introduced snow based on the quality of the snow when the snow is introduced into the hopper of a snow forming machine. (2) The method according to claim 1, characterized in that a mixed fluid of water and air is sprayed onto the input snow. (3) The method according to claim 1, characterized in that water or a mixed fluid of water and air is sprayed into the conveying pipe for the introduced snow.