JPH11116053A - Rotary valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothen delivery of a carried object by carrying air from a chamber between blades, forming a carrying air inlet and/or a carrying air outlet in a shape where circumferential width increases toward the radially outer side. SOLUTION: In an isopodous trapezoid outline of a carrying air inlet 52 and a carrying air outlet 53, diagonal lines are placed on diameters of a side plate 15, the long side of the parallel facing sides is placed on the radially outer side, the short side is a line orthogonal to a diameter of the side plate 15, and the long side is a circular arc matching to the inner periphery of a cylindrical casing. Because the carrying air inlet 52 and the carrying air outlet 53 have the isopodous trapezoid outline which expands in the radially outer direction, each part of a sector space overlaps the carrying air inlet 52 and the carrying air outlet 53 and pressing out time caused by the carrying air is uniformed. This reduces the trouble that insufficient flow of the carrying air or insufficient introduction from the sector space causes artificial snow at a specific part in the sector space to remain in the sector space.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary valve used for transporting artificial snow and the like manufactured by, for example, an artificial snowfall machine.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a conventional rotary valve 10.
It is the front view and side view of. This rotary valve 10
Artificial snow (including flaked ice) manufactured with an artificial snow machine
Is provided at a location where air is conveyed, and a housing 11, a rotor 12 rotatably disposed in the housing 11, and a rotatable integrally with the rotor 12, rotatably supported by the housing 11, and having one end outside the housing 11. The rotating shaft 13 protrudes from the rotating shaft 13. The housing 11 includes a cylindrical casing 14 defining a cylindrical space inside, and a pair of side plates 15 joined to both sides of the cylindrical casing 14. Rotor
12 is the drum 16 and the drum 16 at equal intervals in the circumferential direction of the drum 16
Plural blades 17 fixed to the outer periphery of 16 and extending in the radial direction 17
It has. A resin sealing material 18 as a clearance adjusting section is attached to the tip of each blade 17 and the rotor 12
The inner surface of the cylindrical casing 14 slides with the rotation of. The fan-shaped space 19 is formed between the blades 17 adjacent to each other in the rotation direction, and the radially inner side and the outer side are defined by the outer peripheral surface of the drum 16 and the inner peripheral surface of the cylindrical casing.

The support portion 20 has an upper end fixed to a lower portion of the cylindrical casing 14 and extends downward by a predetermined dimension. The bracket 25 is fixed to the side of the outer peripheral portion of the cylindrical casing 14 and extends to the side of the cylindrical casing 14. Motor 26
Is mounted and fixed on the bracket 25, and the output shaft 27 is
13 protrudes in the parallel direction, and the rotation speed can be adjusted. The gears 28 and 29 are integrally mounted on the rotation shaft 13 and the output shaft 27 in the rotation direction, respectively. The chain 30 is mounted on the gears 28 and 29 and transmits the rotation of the output shaft 27 of the motor 26 to the rotation shaft 13. I do. The inlet 35 is provided at the upper part of the cylindrical casing 14, and the transfer air introduction pipe 36 and the transfer air outlet pipe 37
Each side plate 15 is connected to the lower outer surface side such that the center line is collinear and parallel to the rotation axis 13.

FIG. 5 is a front view of the side plate 15 shown in FIGS. The side plates 15 are provided as a pair in the housing 11 (FIG. 4), and circular holes provided in one and the other in the same shape are respectively provided in the conveying air inlet 38.
And the transport air outlet 39. The transfer air inlet 38 and the transfer air outlet 39 are connected to the transfer air introduction pipe 36 and the transfer air outlet pipe 37.
(FIG. 4) are drilled at the portions of each side plate 15 that are connected to the side plates 15. The transfer air inlet 38 and the transfer air outlet 39 have a circular shape whose diameter is slightly larger than the length of the blade 17 and face one or two fan-shaped spaces 19 in the lowermost region of the cylindrical casing 14. ing. The insertion holes 44 are formed at equal angular intervals around the side plate 15 except for the lower portion of the side plate 15. After a predetermined tightening bolt (not shown) is inserted into the insertion hole 44, it is screwed into a thick portion of the peripheral wall of the cylindrical casing 14 to tighten the side plate 15 to the cylindrical casing 14. The four screw holes 45 are
A predetermined tightening bolt is inserted into the through-hole (not shown) of the joining flange of the transfer air introducing pipe 36 and the transfer air outlet pipe 37 at intervals of 90 ° along the circumference of. Then, the screw is screwed into the screw hole 45, and the transfer air introducing pipe 36 and the transfer air outlet pipe 37 are fastened to the side plate 15.

During operation, the rotary valve 10
The rotor 12 is rotated by the rotational power from the motor. Further, the conveying air flows from the conveying air introducing pipe 36 to the conveying air outlet pipe 37 through the lower part of the housing 11, and the housing air
In the lower part of 11, the carrier air blows from the carrier air inlet 38 to the carrier air outlet 39. Artificial snow (including flake ice) produced by an artificial snowfall machine is transported to the inlet 35 of the rotary valve 10 by a screw conveyor (not shown), and falls into the housing 11 through the inlet 35. And
It is introduced into the fan-shaped space 19 passing just below the inlet 35. The artificial snow introduced into each fan-shaped space 19 is conveyed toward the conveying air inlet 38 and the conveying air outlet 39 as the rotor 12 rotates. When the fan space 19 reaches the transfer air inlet 38 and the transfer air outlet 39, the fan receives the transfer air from the transfer air introduction pipe 36 through the transfer air inlet 38, and thereby, the artificial snow in the fan space 19 is formed. Is transported by the transport air, and is transported through a transport air outlet 39 and a transport air outlet pipe 37 to a passage (not shown) on the downstream side of the transport air outlet pipe 37.

[0006]

SUMMARY OF THE INVENTION Conventional rotary valve
The 10 transfer air inlets 38 and transfer air outlets 39 are circular,
On the other hand, since the peripheral velocity of each part of the fan-shaped space 19 increases radially outward, the time at which each part of the fan-shaped space 19 overlaps the conveying air inlet 38 and the conveying air outlet 39 to receive and extrude the conveying air. There is unevenness. Therefore, the fan space 19
Although the artificial snow at a part of the specific area is smoothly carried out of the fan-shaped space 19, the artificial snow at another specific part may remain. Further, in the conventional rotary valve 10 for artificial snow, the rotor 12 directly contacts the inner surface of the side plate 15, and there is a possibility that the transport air leaks along the inner surface of the side plate 15 or the rotor 12 is seized. Was.

An object of the present invention is to provide a rotary valve which can overcome the above-mentioned problems.

[0008]

In the rotary valve (10) of the present invention, an object to be transported is introduced into an inter-blade chamber (19) defined between blades (17) which are circumferentially adjacent to each other. Housing (1
1) Rotor (12) rotating inside, and transfer air is rotor (12)
A transport air inlet (52) and a transport air outlet (53) formed in the side wall (15) of the housing (11) so as to pass in the axial direction of the rotor (12) at a predetermined location in the circumferential direction of the rotor. I have.
Then, the transfer air inlet (52) and / or the transfer air outlet (53)
Are shaped to increase the circumferential width outward in the radial direction.

A transport air inlet (52) and / or a transport air outlet;
The shape (53) conforms to the cross-sectional shape of the inter-blade chamber (19) as compared with the conventional circular shape, that is, the shape approximates the cross-sectional shape of the inter-blade chamber (19). As a result, the time during which each part in the inter-blade chamber (19) is connected to the transport air inlet (52) and / or the transport air outlet (53) is equalized, and from the inter-blade chamber (19) due to the transport air. Can be carried out smoothly.

According to the rotary valve (10) of the present invention,
The conveying air inlet (52) and / or the conveying air outlet (53) have an isosceles trapezoidal contour that gradually increases the leg width outward in the radial direction of the rotor (12).

The blades (17) which are adjacent to each other in the circumferential direction of the rotor (12)
Is usually divergent outward in the radial direction, so that an isosceles trapezoidal profile whose circumferential width gradually increases outward in the radial direction of the rotor (12) is the cross-sectional profile of the inter-blade chamber (19). The shape is very similar to Also, the isosceles trapezoidal profile is simple and easy to form in the housing (11).

According to the rotary valve (10) of the present invention,
The side wall (15) of the housing (11) is covered with a lining material (55) on the inner surface side with which the rotor (12) slides.

The lining material (55) is made of, for example, a material such as ethylene tetrafluoride resin, and the rotor (12) is connected to the housing (1).
While preventing direct contact with the side wall (15) of (1), it is possible to prevent the transfer air from the transfer air inlet (52) from leaking between the rotor (12) and the side wall (15). Also, seizure between the rotor (12) and the side wall (15) of the housing (11) is prevented.

According to the rotary valve (10) of the present invention,
The conveyed objects are artificial snow and flake ice produced by an artificial snowfall machine.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. In the following description of embodiments of the invention, common points with the conventional rotary valve 10 shown in FIGS. 3 to 5 will be omitted, and differences will be mainly described. 1 and 2 are a front view and a side view of the side plate 15, respectively. The side plate 15 is connected to the housing 11 (FIG. 4).
A pair of circular holes provided in one and the other and having the same shape as each other serve as a transport air inlet 52 and a transport air outlet 53, respectively. Further, with the change from the conventional circular holes of the conveying air inlet 38 and the conveying air outlet 39 to the substantially equal-shaped trapezoidal holes of the conveying air inlet 52 and the conveying air outlet 53, the conveying air inlet pipe 36 and the conveying air inlet 38 are formed. The shape of the end of the transfer air inlet 52 and the screw hole 54 side is substantially equal to the shape of the transfer air inlet 52 and the screw hole 54 so as to match the shape of the transfer air inlet 52 and the screw hole 54. Be changed. The contoured trapezoidal contours of the transfer air inlet 52 and the transfer air outlet 53 are such that the symmetrical line is placed on the diameter of the side plate 15, and the long side of the parallel opposite side is radially outward, and the short side is the side plate. Although the straight line is perpendicular to the diameter of 15, the long side is an arc that matches the inner peripheral contour of the cylindrical casing 14. The contours and dimensions of the conveying air inlet 52 and the screw hole 54 are different from those of the conventional conveying air inlet 38 and conveying air outlet 39 (FIG. 5) in conformity with the cross section of the fan-shaped space 19. It is set as a shape closer to the cross-sectional shape. A total of four screw holes 54 are formed on the outer surface of the side plate 15 outside each apex of the transport air inlet 52. The fastening bolt (not shown) is inserted into the through-hole of the joining flange of the transfer air introduction pipe 36 and the transfer air lead-out pipe 37, and then screwed into the screw hole 54. The tube 37 is fastened to the side plate 15. The inner surface of the side plate 15, that is, the side on which the rotor 12 is provided is covered with a coating 55 made of, for example, a fluoroethylene resin.

The carrier air inlet 52 and the carrier air outlet 53 have the shape of an isosceles trapezoid that spreads outward in the radial direction, so that each part of the fan-shaped space 19 has the carrier air inlet 52 and the carrier air outlet 53.
, And the time for receiving and extruding the transport air is made uniform. As a result, the artificial snow at a specific portion in the fan-shaped space 19 is insufficiently hit by the conveying air or is not sufficiently derived from the fan-shaped space 19, and the trouble remaining in the fan-shaped space 19 is reduced.

The rotor 12 rotates in the housing 11 by the rotational power transmitted from the motor 26, and accordingly, the side of the rotor 12 slides on the coating 55 of the side plate 15. The coating 55 made of a tetrafluoroethylene resin or the like has a sealing property and a lubricating property, so that the transport air introduced into the housing 11 from the transport air introducing pipe 36 is introduced along the inner surface of the side plate 15 into the inlet port. Leakage to 35 is prevented. Also, seizure between the rotor 12 and the side plate 15 is prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a side plate.

FIG. 2 is a side view of a side plate.

FIG. 3 is a front view of a conventional rotary valve.

FIG. 4 is a side view of a conventional rotary valve.

FIG. 5 is a front view of the side plate of FIGS. 3 and 4;

[Explanation of symbols]

 Reference Signs List 10 rotary valve (rotary valve) 12 rotor 17 blade 52 transfer air inlet 53 transfer air outlet 19 fan-shaped space (between blades) 11 housing 15 side plate (side wall portion) 55 coating (coating lining material)

Claims (4)

[Claims] A rotor (12) for rotating an inside of a housing (11) by introducing an object to be transported into an inter-blade chamber (19) defined between circumferentially adjacent blades (17); and The side wall of the housing (11) so that the carrier air passes in the axial direction of the rotor (12) at a predetermined location in the circumferential direction of the rotor (12).
(15) The transport air inlet (52) and the transport air outlet (5
In the rotary valve (10) having 3), the transport air inlet (52) and / or the transport air outlet (53)
Is a shape in which the circumferential width increases radially outward. 2. The transfer air inlet (52) and / or the transfer air outlet (53) have an isosceles trapezoidal contour whose leg width gradually increases outward in the radial direction of the rotor (12). The rotary valve according to claim 1, wherein: 3. The side wall (15) of the housing (11).
The lining material (5
3. The rotary valve according to claim 1, wherein the rotary valve is covered by (5). 4. The rotary valve according to claim 1, wherein the conveyed objects are artificial snow and flake ice manufactured by an artificial snowfall machine.