JPS6110772Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a water and air injection nozzle in an artificial snow machine.

In an artificial snowmaking machine, water and compressed air are injected into the airflow from the circumference of a wind tunnel that blows a large volume of airflow in one direction, and seed crystals are generated by the cooling effect caused by adiabatic expansion when the compressed air is injected. It is well known that this promotes the production of artificial snow, thereby making it possible to make large amounts of artificial snow. In performing the above-mentioned water and air injection, conventionally, water and air are injected through separate nozzles and then mixed with each other after injection, or water and air are mixed in one nozzle and then injected. However, in the former case, separate nozzles are required and the equipment is complicated, and in the latter case, the balance between water pressure and air pressure is important, and when the differential pressure becomes large to a certain extent, the high pressure will change to the low pressure. There is a drawback that it flows backwards.

This invention provides a nozzle in which water injection holes and air injection holes are formed in the same carrier, and both are opened directly to the outside world separately, so that air and water do not mix inside the nozzle. The main body block has a protrusion with a different diameter at its center, and an air flow path that can be connected to a compressed air source at the base is formed through the center of the main body block, and the protrusion is formed into an air injection pipe. A water flow path connectable to a water supply source is opened at the outer peripheral base of the air flow path of the block to the outer peripheral step of the air injection tube, and an annular slit hole for water injection is formed around the air injection tube opening. A lid having a hole is attached to the main body block.

Next, an embodiment of this invention will be described with reference to the drawings. Reference numeral 1 denotes a main body block, which is a cylindrical body having a protrusion with a different diameter at the center, through which an air flow passage 2 is provided, and the protrusion with different diameter is formed into an air injection pipe 3 that opens the air flow passage. be done. Reference numeral 4 designates a connecting block which is screwed into the main body block 1, and has an air piping connection hole 5 from a compressed air source communicating with the air flow path 2.
can be connected to a compressed air source (not shown). 6
is a water flow path bored in the main body block, which opens from the outer peripheral base of the air flow path 2 to the outer peripheral step 7 of the air injection pipe 3, and the water flow path is provided in the connecting block 4 at the base of the main body block. The water pipe connection hole 8 is connected to the water pipe connection hole 8, so that the water flow path 6 can be connected to a water supply source (not shown). It is desirable that a plurality of water channels 6, for example three, are arranged at equal angles around the air channel 2. Reference numeral 9 denotes a lid body which surrounds and caps the outer circumferential step 7 of the air injection pipe 3, and has a hole in the center of the top that forms an annular slit hole 10 for water injection around the opening of the air injection pipe 3; It is screwed with a tightening ring 11, whereby the water flow path 6 communicates with the water injection annular slot hole 10 through a gap 12 formed by the outer periphery of the air injection pipe 3 and the lid 9. do. That is, in this invention, the annular slot hole 10 for water injection and the tube hole of the air injection tube 3 are separated by the wall thickness of the air injection tube. It is generally desirable that the air and water jet directions be approximately parallel. The hole of the air injection pipe 3 is about 0.5 to 1.5 mm, and the width of the annular slot hole 10 for water injection is about 0.5 mm. However, in models with a large air flow rate, the wall thickness can be set to increase the interval. Furthermore, the opening surfaces of the air injection pipe 3 and the annular slot hole 10 for water injection in this invention do not necessarily have to coincide as illustrated in the drawings.

Figure 3 explains the state in which the nozzle N of this invention is installed in the wind tunnel B of an artificial snowmaking machine, and shows a water supply pipe P and a compressed air supply pipe provided so as to go around or half around the outer circumference of the air outlet of the wind tunnel. Similar to the conventional example, a large number of nozzles N are attached and used radially to the pipe P', oriented in the volumetric air flow direction S.

As described in detail above, in this device, although water injection and air injection are performed by one nozzle body, since they have mutually independent openings, water pressure and air pressure can be They do not interfere with each other, and since the water stream W and the air stream A are injected at the same time very close to each other, the two streams immediately come into contact with each other, and the atomization of water particles is achieved.
The cooling effect due to the adiabatic expansion of compressed air is extremely effective, making it possible to quickly generate snow nucleation and refine snow grains. In addition, as mentioned above, there is no mutual interference between high and low water pressure and air pressure, so it is possible to change the water pressure freely.For example, when the water temperature is high, the water pressure can be lowered to reduce the amount of water, making it more efficient even under adverse conditions. It enables good snow nucleation, exhibits great adaptability to weather conditions, and has a water pressure of 5 to 30
Good results were obtained in the range of Kg/cm ² and air pressure of 6.0 to 8.0 Kg/cm ² . Furthermore, since this invention does not have a capillary structure or a spiral structure that is generally applied to nozzles, it has a simple structure and is extremely advantageous in terms of maintenance.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention. Fig. 1 is a plan view, Fig. 2 is a sectional view from A to A' in Fig. 1, and Fig. 3 is a nozzle of this invention installed in an artificial snowmaking machine wind tunnel. FIG. 1...Main block, 2...Air flow path, 3...
Air injection pipe, 6...Water flow path, 7...Air injection pipe outer peripheral step, 9...Lid body, 10...Annular slit hole for water injection.

Claims (1)

[Scope of utility model registration request] An air flow passage connectable to a compressed air source at the base is provided through the center of the main body block having a protrusion with a different diameter at the center, and the protrusion is formed into an air injection pipe. A water flow path connectable to a water supply source is opened at the outer circumferential base of the air injection tube at the outer circumferential step thereof, and a lid body is provided with a hole forming an annular slit hole for water injection around the opening of the air injection tube. A water and air injection nozzle for an artificial snowmaking machine is mounted on the main body block.