JP2996949B1 - Constant-pressure pump-type snowmaking machine - Google Patents

Abstract

A blower-type crusher that eliminates fluctuations in the supply amount of ice blocks, eliminates variations in ice and snow particles, eliminates the blockage of ice blocks in a casing, and effectively uses airflow to discharge ice and snow as artificial snow to a distant place. I will provide a. A casing (3) having an ice block inlet (4) for receiving an ice block (2) at an upper portion, and rotating inside the casing (3) to form an ice block (2).
Blades 8 for supplying a fixed amount of ice, a fixed amount of ice block 1 provided with an ice block outlet 5 provided at the lower portion of the casing 3, and a blower tube opening of a blower tube 9 for receiving the ice blocks 2 supplied from the fixed amount of ice block 1 together with the blower 12. Casing 1 having side 10
The rotating blades 15 in the casing 13 for crushing the ice blocks 2 into ice and snow 18 and the air outlets 19 provided on the side of the casing 13 opposite to the air inlet 10 for discharging the obtained ice and snow 18 as artificial snow 20. The blasting crusher 11 having an
Characterized in that the ice block receiving port 14 is connected through a blower tube 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snowmaking apparatus for an artificial ski resort, and more particularly to an apparatus for producing artificial snow that supplies ice blocks, breaks them into ice and snow, and discharges them to a distant place.

[0002]

2. Description of the Related Art An air crusher such as an ice crusher of a conventional apparatus is an apparatus for manufacturing artificial snow 49 by finely crushing ice blocks 48 into ice and snow, and has a structure as shown in FIG. 9 or FIG. is there. That is, the apparatus shown in FIG. 9 includes crushing rotary blades 45 erected at equal intervals radially around a rotary shaft in a casing 44 provided on a rigid base 47, and the rotary blade 45 is mounted on the casing 44. And a supply port which also serves as an air supply port 41 for supplying air for blowing off artificial snow 49 and a supply port 42 for ice blocks as a raw material at one end of the base 47 at the lower end of the casing 44. A discharge port 43 for blowing out artificial snow 49 made of crushed ice and snow is provided at the other end on the base 47 at the lower end of the casing 44 opposite to the supply port 42. Ice blocks 4 supplied together with air from the air outlet 41 on the base on the right side of the figure
8 is beaten against a base 47 by the rotational force of a rotating blade 45 provided on a rotating shaft 46 which rotates at high speed in a casing 44 to break the ice and snow into artificial snow 49, which is blown from a discharge port 43 to a ski slope at a ski resort by blowing air. Is to spray.
Further, another conventional type of blower crusher is as shown in FIG. 10, and the supply port 42 of the ice block and the blower port 41 for supplying the blowing air are different from the case of FIG. The ice block 48 is provided at a separate place in the casing 44, and the supply port 42 of the ice block 48 is located above the casing 44. The ice block supplied from the supply port 42 is crushed by a rotating shaft 46 at a high speed. While being transferred and fed, the rotating blades 45 beat and crush the air to reach the blower opening 41 at the lower end of the casing, and are further crushed into ice and snow by the rotating blades 45 with the base 47 to form artificial snow 49. It is discharged from the discharge port 43 on the opposite side of the lower end of the casing 44 by blowing air and blown off.

[0003] These conventional blower-type crushers have the following difficulties. That is, the blasting machine shown in FIG.
Fluctuations in the supply amount of ice blocks 48 supplied to the casing 44 cause variations in the size of the ice and snow particles crushed by the rotating blades 45. When the supply of the ice blocks 48 becomes excessive, the blowing port 41 and the discharge port 43 There is a risk of blockage between the two, and excessive power is required to rotate the rotary blade 45 at high speed. In the blower-type crusher of FIG.
In addition to the drawbacks of the blower-type crusher of FIG. 3 described above, when the blower wind at the blower outlet 41 is further increased in order to discharge the crushed ice and snow to a distant place, all the blower wind in the casing 44 is discharged to the outlet 43.
And flows backward to the supply port 42 side and leaks from the supply port 42, so that the wind blast that releases the crushed ice and snow artificial snow 49 from the discharge port 43 is attenuated, and the artificial snow 49 can be discharged far away. It is not possible, so that more power is required than necessary.

[0004]

SUMMARY OF THE INVENTION The fluctuation of the supply amount of ice blocks is eliminated, the variation in the size of ice and snow particles after crushing is eliminated, and artificial snow more suitable for ski resorts is obtained. Eliminate the stoppage of the operation of the crusher,
Further, it is an object of the present invention to provide an efficient blast-type crusher capable of effectively using all the supplied blast without requiring extra power, and discharging crushed ice and snow as artificial snow to a distant place. .

[0005]

According to the first aspect of the present invention, there is provided a casing for providing an ice block inlet for receiving an ice block thereon, and rotating the inside of the casing to remove the ice block. An ice block quantitative supply machine having a rotating blade for quantitatively supplying the ice block and an ice block outlet provided at a lower portion of the casing; a casing having an air pipe opening of a blower pipe for receiving the ice block supplied from the ice block quantitative supply apparatus together with the air; A blower-type crusher having a blowing vane in the casing and a blower discharge port provided on a side of the casing opposite to a blower pipe opening for discharging the obtained ice and snow as artificial snow. A quantitative pressure-feeding snowmaking machine characterized in that an ice block receiving port of a blower-type crusher is connected to an ice block outlet via a blower pipe.

According to the second aspect of the present invention, the ice block quantitative feeder is
2. A quantification method according to claim 1, wherein a small gap is provided between the casing and the periphery of the rotating blade for supplying the ice mass in a fixed amount, thereby preventing the backflow of air from the ice mass outlet into the ice mass quantitative supply machine. It is a pumping type snowmaking machine.

According to the third aspect of the present invention, the rotary blades of the blower-type crusher are provided with rotary blades having the same width as the axis length of the rotary shaft and radially erected at equal intervals around the rotary shaft in parallel with the axis. 3. A constant-pressure pump-type snowmaking machine according to claim 1 or 2.

According to a fourth aspect of the present invention, the rotating blades of the blower-type crusher are configured such that the center of the shaft is retracted from the shaft end in a direction opposite to the rotation direction from the left and right shaft ends to the center of the shaft. 3. A quantitative pumping type artificial apparatus according to claim 1, wherein a plurality of rows of rotating blades provided at an angle to the shaft center 39 are radially provided at equal intervals around the rotating shaft. It is a snow making machine.

According to the fifth aspect of the present invention, the rotating blade of the blower-type crusher is configured such that a leading end of the blade is bent in a direction opposite to the rotating direction from a bending curve on the way from the root to the leading end of the blade. A constant-pressure pump-type snowmaking machine according to claim 3 or 4.

[0010] That is, the means of the present invention is provided with an ice block quantitative supply device for quantitatively supplying raw material ice and snow to the blower-type crusher. This ice block quantitative feeder is provided with a plurality of rotating blades arranged at equal intervals around a rotating shaft that rotates in a cylindrical outer casing, and pressurized air for sending compressed air to a blower crusher. With the ice block outlet of this ice block quantitative feeder facing the blower tube of, the ice block is supplied to the blower-type crusher, and the fixed amount is supplied by adjusting the volume between the blades of the rotating blades and the rotation speed, and the casing The gap between the inner wall and the periphery and tip of the rotating blade for quantitative supply is kept at the minimum distance that does not hinder the rotation of the rotating blade, and the supply port of the ice block to the blower-type crusher, which is the outlet of the ice block of the ice block quantitative supply machine This prevents the pressure blast supplied to the blasting crusher from flowing back into the ice block quantitative feeder from attenuating the blasting to the blasting crusher.

On the other hand, the blower-type crusher is provided with a plurality of rotating blades radially provided on a high-speed rotating shaft provided in a cylindrical outer casing, and crushing the compressed air supply pipe toward the casing side. An outlet for discharging artificial snow made of crushed ice and snow is provided on the opposite side of the casing from the pressure air flow inlet. Moreover, in the blower-type crusher in which the rotating blades are alternately arranged in two rows on the rotating shaft, the rotating blade has one blade standing from one shaft end of the rotating shaft to the center of the shaft circumference between the left and right shaft ends. Further, two rows of a plurality of blades are erected on the left and right sides of the rotation shaft circumference so that another one blade is erected from the center of the shaft circumference to the other shaft end, and these left and right blades are connected to each other. Standing alternately. In this way, the ice mass supplied for crushing moves left and right by the rotation of the blades and reaches the discharge port and moves between the blades,
No extra power is required because ice and snow can be prevented from clogging between the blades, and furthermore, as it moves between the blades, it is hit by the blades every time the blade changes, and it is crushed into more uniform and fine particles of ice and snow. Therefore, artificial snow more suitable for the ski area can be obtained. Furthermore, the ice block moves further between the left and right blades by tilting the center of the shaft circumference of the two left and right blades in the direction of retreating in the opposite direction to the rotation direction with the rotation axis inclined. And the crushing efficiency is improved. In addition, each blade can crush ice blocks more efficiently by bending the tip in the direction opposite to the rotation direction. Further, since the blowing air does not flow backward in the casing and the blowing pressure does not decrease, the produced artificial snow can be discharged further.

[0012]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of a constant-pressure pump-type snowmaking machine according to the present invention, which illustrates the inside except for a front side surface. The reference numeral 1 is an ice block quantitative feeder. The quantitative pressure feeding type snow making machine of the present invention uses this ice block quantitative feeder 1 as a blast crusher 11.
The feature is that it has on the upstream side of. The ice lump dispenser 1 has a funnel-shaped ice lump inlet 4 for receiving an ice lump 2 serving as a raw material for ice and snow above a cylindrical casing 3 made of steel.
A rotating shaft 6 driven and rotated by a motor (not shown) in the direction of the arrow is provided in the center of the casing 3, and a rotating shaft 6 around the rotating shaft 6 of the rotating shaft 6 reaches the inner wall of the casing 3. Rotating blades 8 composed of six steel blades having a width are radially arranged at equal intervals. An ice block outlet 5 having a width between adjacent blades is provided at the lower end of the casing 3.

An ice block outlet 5 of the ice block quantitative supply device 1 is blown to a blower-type crusher 11 disposed below the ice block quantitative supply apparatus 1.
Blower 1 connected to the side of a blower tube 9 for feeding
One ice block receiving port 14 is provided. The ice block 2 is received from the ice block receiving port 14 and is sent into the blower crusher 11 through the blower pipe 9 connected to the side of the steel cylindrical casing 13 of the blower crusher 11 through the blower tube 9 together with the blower 12. Is done. A rotating shaft 15 that is driven and rotated at high speed in a direction indicated by an arrow by a prime mover (not shown) is provided in the center of the casing 13.
Rotating blades 17 made of steel blades reaching the inner wall of No. 3 are radially arranged at equal intervals. The ice and snow 18 obtained by crushing in the casing 13 is sent to the side of the lower end of the casing 13 opposite to the ventilation pipe port 10 together with the blast to send the snow 2
An air outlet 19 that discharges as 0 is provided.

The rotating blades 8 of the ice block metering and feeding machine 1 have a clearance 2 between the periphery of the rotating blades 8 and the tip 21 and the casing 3.
2 is provided as small as possible so as not to hinder the rotation of the rotating blades, and a blast 12 that is fed from the ice block outlet 5 into the ice block quantitative supply machine 1 through the gap 22 reversely enters the ice block quantitative supply machine 1. Prevent from falling out of the ice block entrance.

The rotary blade 17 of the blower-type crusher 11 has various modifications in the embodiment.
7 will be described. FIG. 2 shows the shaft length 2 from one shaft end 25 to the other shaft end 25 on the rotation shaft circumference 16 of the rotation shaft 15.
6 rotating blades 17 having the same size as 3 and having a width of 24
9 are erected in parallel at equal intervals. In this case, the ice block 2 charged from the air inlet 10 on the side of the casing 13 is crushed by being hit by one rotating blade 17 that has been rotated, and further pushed by the rotating blade 17 during rotation, and The ice blocks are crushed more finely by the grinding of the ice blocks and ice and snow 18
And is discharged from the ventilation outlet 19.

Referring to FIG. 3, the rotating blade 17 of another embodiment is configured such that the rotating blade 17 having a width from the left and right shaft ends 25 of the rotating shaft 15 to the center 26 of the shaft circumference is parallel to the shaft center 39. Each of the rotating blades 15 is erected in two rows, one row to the left and one row to the right on the axial length 23 of the rotating shaft 15, and the rotating blades 17 in the left row and the right row are arranged stepwise from each other. . In this case, the rotation shaft circumference 1 on the side of the shaft circumference center 26 of each rotation blade 17
6 has no adjacent rotating blades 17, the ice block 2 inserted through the air inlet 10 on the side of the casing 13.
Is inserted in front of the rotating blade 17 that has been rotated and is crushed by being hit by the rotating blade 17, but is further pushed by the rotating blade 17 during rotation of the rotating blade 17 to rotate around the rotating shaft of the next row. 1
6 and sequentially moved between the left and right rotating blades 17 during rotation, each time being hit by the rotating blades 17 in the row, and further broken into fine pieces. And ice and snow 18 of uniform and fine particles are formed.

Further, the rotary blade 17 according to another embodiment is described.
Is shown in FIGS. 3 to 5, wherein the two rows of left and right rotating blades 17 are erected in parallel to the axis 39 of the rotating shaft 15, whereas in this embodiment, the rotating shaft is 15 from the left and right shaft ends 25 to the center of the shaft periphery 26, the center of the shaft periphery of each of the two left and right rotating blades 17 is retracted from the shaft end 25 in the direction opposite to the rotation direction 27, Is provided to be inclined with respect to the axis 39. 4A is a plan view of the rotating blade 17, FIG. 4B is an elevation view of the rotating blade 17, and a dotted line in FIG.
In (b), the blades 3 erected upward from the rotating shaft 15
2 is located in front of the rotary shaft 15 as shown in FIG. 3A, and the blade 32 is tilted from the shaft end 25 in front of the rotary shaft 15 to the shaft center 26 with respect to the shaft center 39 together with the blades 35 and 36 on the front side. And the blades 33, 34,
37, 38 are also symmetrical from the shaft end 25 on the opposite side to the shaft center 2
6, each blade is inclined upright with respect to the axis 39, and the center of each blade 26 is inclined in the opposite direction to the rotation direction 27 of the rotary blade 17. FIG. 5 shows the rotating shaft 2
FIG. 5 is a plan view of a development view in which a rotary blade 5 and a standing rotary blade 17 are developed on a plane for explanation. When the rotating blade 17 rotates in the rotation direction 27 as shown in FIG.
Moves between the upper and lower blades in a two-row diagram as indicated by the arrow in the direction of ice movement 40, and is beaten by the blades at each degree of movement to be crushed into ice and snow 18 and in the rotation direction 27 as a whole. It moves and is discharged from the ventilation outlet 19. That is, the ice block 2 collides with the blade 37 and is hit, and then moves along the arrow, further collides with the blade 35, is hit and crushed, moves further, moves to the blade 33, and further moves to the blade 32. While moving in this manner, it is further crushed into ice and snow 18, sent as a whole in the direction of movement 27, and discharged from the air outlet 19.

FIGS. 6 to 8 show another embodiment.
Shown in FIG. 6 shows a modification of the rotary blade 17 shown in FIG. 2, and FIG. 7 shows a modification of the rotary blade 17 having two rows shown in FIG. In these examples, each rotating blade 1
7, a folding curve 30 is provided in the middle from the blade root 28 to the blade tip 29, and the blade tip 31 on the tip side of the folding curve 30 is bent at an angle in the direction opposite to the rotation direction 27. is there. FIG. 8 shows a plan view of the rotary blade of FIG. 7 as (a), and an elevation view thereof as (b). By bending the blade tip portion 31 in the reverse direction in the rotation direction 27 of the rotary blade 17 in this manner, the ice blocks 2 supplied from the blower tube opening 10 to the blower-type crusher 11 are more strongly hit by the rotary blade 17. Will be crushed and finer ice and snow 18 will be formed,
The artificial snow 20 which is more suitable for a ski resort is formed and scattered farther.

The details and operating conditions of the apparatus of the present invention will be further described. The ice block supplied to the ice block fixed-quantity feeder 1 has a size of 7 mm thick × 50 mm × 100, which is separately made by an ice machine.
Use mm plate ice. The rotating speed of the rotating blades 8 of the ice block quantitative supply device 1 is set to 25 rpm and supplied to the blower-type crusher 11 together with the high-pressure blow of the blower tube 9. The intensity of the high-pressure air blown by the blower tube 9 is such that artificial snow 20 made of ice and snow 18 crushed by the blower crusher 11 can be conveyed from the blower outlet 19 at a wind speed of 30 m / sec. That is, the rotation speed of the rotating blades 17 of the blower-type crusher 11 is 15
A high-speed rotation speed of 00 to 1600 rpm is set. The processing capacity of the blower-type crusher 11 is 20
m ³ / hr. The rotating blades 17 erected in two rows
The angle of inclination of the blade with respect to the axis 39 from the shaft end 25 to the shaft circumferential center 26 is 10 to 15 degrees. Blast crusher 1
The diameter of one rotating blade 17 is 700 mm, and the length of the axial length 23 is 190 mm. In the rotary blade 17 in which the blade tip portion 31 is bent along the bending curve 30, the radius from the axis center to the blade bending curve 30 is 250 mm. The number of blades in each row on the circumference of the rotating shaft is six. The size of the ice and snow 18 crushed by the blower crusher 11 is roughly the size of shaved ice. Ice and snow 18 produced on a ski slope at a ski slope is sprayed as artificial snow 20 from a ventilation outlet 19 of the blower-type crusher 11 by a hose having a length of about 150 m.

[0020]

As described above, the constant-pressure pump-type snowmaking apparatus of the present invention is provided with the ice block quantitative feeder that supplies the ice blocks to the blower crusher at a constant rate upstream of the blower crusher. As the crushing by the rotating blades of the blower crusher is always performed uniformly, there is no variation in the size of the crushed ice and snow particles.Moreover, ice blocks are uniformly supplied at every fixed amount, so excess supply between the rotating blades There is no blockage, the blower crusher does not stop suddenly, and no extra power is required to force the rotating blades to rotate. Furthermore, the blower for pressure feeding does not reversely enter the ice block quantitative feeder and does not cause a drop in the blower pressure, and the blower crusher also has an ice block supply port at one location of the blower pipe port. Since all air blown from the mouth with ice blocks is used for the release of artificial snow from the air outlet, there is no pressure loss,
Artificial snow can be sprayed far away. Furthermore, since the rotating blades of the blower-type crusher are arranged alternately in two rows around the axis of the rotating shaft, ice and snow supplied during rotation of the rotating blades move between the alternately arranged blades. While colliding with a large number of blades and being violently hit and crushed, it is highly efficient in crushing and efficiently producing large amounts of artificial snow, and ice and snow crushed to a uniform particle size is obtained, producing excellent artificial snow it can. In addition, since the two rows of blades are mounted on the rotating shaft at an angle inclined in a direction in which the center of the shaft is retracted, the ice block can move smoothly between the stepped blades, and the blades can be more efficiently moved. And crushing efficiency is improved. Furthermore, by bending the tip of the blade in the direction of rotation, it is possible to hit the ice block more strongly, thereby improving the efficiency and producing ice and snow with more uniform fine particles. It has excellent effects.

[Brief description of the drawings]

FIG. 1 is a schematic view of a constant-pressure pump-type snowmaking machine of the present invention.

FIG. 2 is a perspective view of a rotating blade of a blower-type crusher having one row of blades of the present invention.

FIG. 3 is a perspective view of a rotary blade having two rows of blades according to another embodiment of the present invention.

FIG. 4A is a plan view of the rotary blade of FIG. 3, and FIG.

FIG. 5 is a plan view of a developed view developed on a plane for explanation of a rotating shaft and a rotating blade.

FIG. 6 is a perspective view of another embodiment in which the blade tip of the rotary blade of FIG. 2 is bent.

FIG. 7 is a perspective view of another embodiment of the rotating blade of FIG. 3, in which the blade tip is bent.

8A is a plan view of the rotary blade of FIG. 7, and FIG. 8B is an elevation view thereof.

FIG. 9 is a schematic side view of a conventional blower-type artificial snow making apparatus.

FIG. 10 is a schematic side view of another conventional blown snowmaking apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Ice block fixed quantity feeder 2 Ice block 3 Casing 4 Ice block inlet 5 Ice block outlet 6
Rotating shaft 7 Rotating shaft circumference 8 Rotating blade 9
Blower tube 10 Blower tube opening 11 Blower-type crusher 12
Ventilation 13 Casing 14 Ice and snow receiving port 15
Rotating shaft 16 Rotating shaft circumference 17 Rotating blade 18
Ice and snow 19 Ventilation outlet 20 Artificial snow 21
Perimeter and tip 22 Clearance 23 Shaft length 24
Width 25 Shaft end 26 Shaft circumference center 27
Rotation direction 28 Blade root 29 Blade tip 30
Cutting curve 31 Blade tip 32 Blade 33
Feather 34 feather 35 feather 36
Wings 37 wings 38 wings 39
Axis 40 Ice moving direction 41 Blow port 42
Supply port 43 Outlet port 44 Casing 45
Rotating blade 46 Rotating shaft 47 Base 48
Ice block 49 artificial snow

Claims (5)

(57) [Claims] 1. A casing 3 having an ice block inlet 4 for receiving an ice block 2 at an upper portion, and a casing 3 provided in the center of the casing 3 for rotating the inside of the casing 3 and supplying the ice block 2 in a constant amount.
Rotating blades 8 arranged at equal intervals on the rotating shaft 6
And an ice block quantitative supply machine 1 having an ice block outlet 5 provided at a lower portion of the casing 3, and a blower pipe opening 10 of a blower pipe 9 for receiving the ice block 2 supplied from the ice block quantitative supply machine 1 together with the blower 12.
And a rotating shaft 1 provided at the center of the casing 13 for crushing the ice block 2 into ice and snow 18.
Rotating blades 17 radially arranged at equal intervals on the rotation shaft circumference 16 of the fifth wheel 5 and the side surface of the casing 13 on the opposite side of the blower pipe opening 10 for discharging the obtained ice and snow 18 as artificial snow 20. And a blower crusher 11 having a blower discharge port 19 provided at the
Characterized in that the ice block receiving port 14 is connected through a blower tube 9. The ice block quantitative supply device 1 is provided with a small gap 22 between the periphery of the rotary blade 8 and the tip 21 for quantitatively supplying the casing 3 and the ice block 2, and from the ice block exit 5 into the ice block quantitative supply apparatus 1. 2. The constant-pressure-feeding artificial snow making machine according to claim 1, wherein the backflow of the air blow 12 is prevented. 3. The rotating blades 17 of the blower-type crusher 11 radiate the rotating blades 17 having the same width 24 as the axial length 23 of the rotating shaft 15 radially at equal intervals on the rotating shaft circumference 16 in parallel with the axis 39. The fixed-rate pumping type artificial snow making machine according to claim 1 or 2, wherein the machine is provided. 4. The rotating blades 17 of the blower-type crusher 11 are arranged such that the center of the shaft periphery extends from the left and right shaft ends 25 of the rotating shaft 15 to the center of the shaft periphery 26 in a direction opposite to the rotation direction 27 from the shaft end 25. The fixed quantity according to claim 1 or 2, wherein a plurality of rotating blades (17) arranged in a row and retracted at an axis (39) are provided radially at equal intervals on the rotating shaft circumference (16). Pumping snowmaking machine. 5. The rotary blade 17 of the blower-type crusher 11 bends the blade tip portion 31 ahead of the folding curve 30 on the way from the blade root 28 to the blade tip 29 in the direction opposite to the rotation direction 27. The quantitative pumping type snowmaking machine according to claim 3 or 4, characterized in that: