JP5324765B2 - Gas injection nozzle and gas injection device including the same - Google Patents

Description

  The present invention relates to a gas injection nozzle for injecting a pressurized gas stored in a pressurized gas supply source while diffusing from a rotating outlet, and a gas injection device including the same.

  As this type of device, there is an invention of a fluid ejection gun that ejects fluid while turning a flexible nozzle made of a flexible cylindrical body along the inner peripheral surface of a trumpet-shaped guide (see Patent Document 1 below). Are known. As an apparatus related to this, an invention of a nozzle that injects a pressurized gas together with a liquid while turning a flexible nozzle having a flexible tube material inside and outside a double tube structure along a trumpet-shaped regulating member (the following patent document) 2). In the above fluid ejection gun and nozzle, the pressurized gas is vigorously ejected from the tip of a flexible nozzle made of synthetic resin such as nylon or polypropylene, and the entire nozzle is swung by the reaction force to rotate the pressurized gas. It is spreading.

  In this way, by injecting pressurized gas from the rotating outlet, it is possible to amplify the pressure wave of the gas and increase the injection force, so when such a gas injection device is used as a dust removal device (dust blower) The dust removal ability can be improved.

JP 2001-104840 A JP 2003-154294 A

However, the flexible nozzle provided in the conventional gas injection device has the following problems.
First, since a considerable injection pressure is necessary to stably rotate the flexible nozzle by injection of pressurized gas, the nozzle can only be used for high-pressure injection applications, and delicate injection is performed. It cannot be used as a required blower.
Second, a trumpet-shaped guide is indispensable in order to define the flexible nozzle swivel diameter as desired. However, since the tip of the nozzle and the inner peripheral surface of the guide violently rub against each other, both easily become fouled and deteriorated. To do. For this reason, the dynamic frictional resistance between the nozzle and the guide inner peripheral surface gradually increases and the swirlability of the nozzle decreases.
Thirdly, the flexible nozzle made of the synthetic resin as described above is hardened in winter or in a cold region, and the swirlability is deteriorated, so that the desired rotational diffusion of the pressurized gas cannot be obtained.

  The present invention has been made in order to solve the above-described problems, that is, a nozzle for injecting a pressurized gas while diffusing from a rotating outlet, and is a small amount or a relatively low pressure regardless of the operating temperature environment. An object of the present invention is to provide a gas injection nozzle whose tip can be satisfactorily swiveled even when a pressurized gas is blown out, and in which there is no risk of contamination or wear of parts. Another object of the present invention is to provide a gas injection device including the gas injection nozzle.

  In the present invention, a rotating body in which a flow path for obtaining a rotational force is formed by a reaction force of a pressurized gas injection is made of a hard material, and a fixed tube that communicates with a pressurized gas supply source. This is based on the technical idea that by attaching it rotatably, it is possible to inject the pressurized gas while rotating and diffusing it without using a flexible tube or a trumpet-shaped guide.

That is, the gas injection nozzle of the present invention is
(1) A gas injection nozzle for injecting a pressurized gas stored in a pressurized gas supply source while diffusing from a rotating outlet,
A fixed pipe whose base end communicates with the pressurized gas supply source, and a rotating body that is made of a hard material and has a through hole that communicates with the fixed pipe, and is rotatably provided with respect to the distal end of the fixed pipe; Have
The rotating body includes a fan that generates an axial flow in the rotation axis direction by the rotation of the rotating body,
At the tip of the rotating body, at the position offset in the radial direction from the rotating shaft of the rotating body, the outlet is formed so as to open in a direction intersecting both the rotating shaft direction and the radial direction. Characterized gas injection nozzle;
(2) The gas injection nozzle according to (1), wherein the fixed pipe and the rotating body are connected via a bearing;
(3) The rotating body has a plurality of air outlets respectively communicating with the fixed pipe at rotationally symmetric positions with respect to the rotation axis, and the plurality of air outlets have the same rotation direction around the rotation axis. The gas injection nozzle according to the above (1) or (2) formed toward
( 4 ) The gas injection nozzle according to any one of (1) to ( 3 ), wherein the rotating body has a brush protruding from the tip thereof;
Is the gist.

The gas injection device of the present invention is
( 5 ) (A) a pressurized gas supply source in which pressurized gas is stored;
(B) The base end is provided with a fixed tube communicating with the pressurized gas supply source and a through hole made of a hard material and communicating with the fixed tube, and is provided rotatably with respect to the distal end of the fixed tube. A rotating body , and the rotating body includes a fan that generates an axial flow in the direction of the rotating shaft by the rotation of the rotating body, and the tip of the rotating body extends radially from the rotating shaft of the rotating body. A gas injection nozzle having an outlet formed in an offset position in a direction that intersects both the rotational axis direction and the radial direction;
(C) a valve body that closes or opens the flow of the pressurized gas from the pressurized gas supply source to the fixed pipe,
A gas injection device characterized in that, by rotating the rotating body around a rotation axis with the pressurized gas to be injected, the pressurized gas is injected from the outlet while diffusing;
Is the gist.

According to the gas injection nozzle of the present invention, the rotating body constituting a part of the flow path of the pressurized gas is made of a hard material and is rotatable with respect to the tip of the fixed tube. The said subject which the gas injection nozzle made to rotate has is solved. That is, the tip of the nozzle and the inner surface of the trumpet-shaped guide are not rubbed and worn out, and the rotation of the nozzle is immediately started as the pressurized gas is blown out regardless of the operating temperature.
Therefore, according to the gas injection device provided with the gas injection nozzle of the present invention, even if the injection pressure of the pressurized gas is relatively low and the amount of blowout is small, the nozzle starts to rotate well. Since the effect of amplifying the pressure wave of the pressurized gas is obtained, it is possible to cope with the case where the injection target requires delicate injection such as feather fibers.

  Moreover, when the gas injection nozzle of this invention is used for a dust blower, the blowing force of pressurized gas can be continuously given to the circumference | surroundings by catching dust on the extension line of a rotating shaft. For this reason, even when dust adheres to a flexible body such as a cloth, or when dust adheres firmly to an object to be adhered, it is necessary to hit the futon with a futon and lift the dust around the target dust. This can be easily removed by applying a continuous striking force to the surface.

  As a more specific aspect of the present invention, the rotating body and the fixed tube may be rotatably connected by a bearing. As a result, the rotational friction acting on the rotating body can be reduced, and the rotating body can be satisfactorily rotated even when used at a relatively low pressure, a small amount of injection, or at a low temperature.

  As a more specific aspect of the present invention, a plurality of air outlets formed in the rotating body may be provided, and each air outlet may be provided at a rotationally symmetric position with respect to the rotation axis. Thereby, the reaction force in the radial direction accompanying the injection of the pressurized gas is balanced, and the rotating body rotates smoothly around the fixed tube without being eccentric. At this time, by directing each air outlet in the same rotational direction, the injection reaction force of the pressurized gas received by each air outlet does not cancel out in the rotational direction, and the rotating body moves in the direction opposite to the same direction. Can be rotated satisfactorily.

  As a more specific aspect of the present invention, an axial fan that generates an axial flow in the axial direction of the rotating body may be provided. Thereby, the rotational component of the gas injected from the rotating outlet is suppressed, and the axial component increases. Therefore, it is possible to suppress the pressurized gas from being excessively diffused and to increase the spraying force in the axial direction.

  Further, as a more specific aspect of the present invention, a brush protruding from the tip of the rotating body may be provided. Thereby, when using the gas injection apparatus of this invention for dust removal, since the effect of the direct wiping by a brush with the injection force of pressurized gas can be acquired, dust removal performance can be made still higher. .

Hereinafter, the gas injection nozzle according to the present invention and the gas injection device including the same will be described more specifically with reference to the drawings.
FIG. 1 is a partial vertical cross-sectional schematic view (side view) of a gas injection nozzle 10 according to a first embodiment of the present invention and a gas injection device 30 provided with the gas injection nozzle 10 on the tip side (right side in the drawing). About the gas injection nozzle 10, the connection part 40 to which this is connected, and the cover 42, the longitudinal cross-sectional view cut | disconnected with the vertical cross section which passes along a rotating shaft (AX) is illustrated.
Fig.2 (a) is a partial longitudinal cross-section schematic diagram (side view) of the gas injection nozzle 10 of this embodiment. The proximal end side (left side in the figure) of the fixed tube 12 is not shown. FIG. 2B is a front view of the gas injection nozzle 10. AA arrow view in the figure corresponds to FIG.

<About gas injection device>
The gas injection device 30 of the present embodiment is a dust removing spray device (dust blower) that removes dust by spraying pressurized gas, and is roughly classified into a spray gun 32, a pressurized gas supply source 50, and stored in this. And pressurized gas (not shown).

The spray gun 32 includes a gun main body 34 and a connecting portion 40 each having a pressurized gas flow path, a lever 36, and a valve body 38 that communicates the flow path and the pressurized gas supply source 50 by the lever 36. The gas injection nozzle 10 of the present invention connected in communication with the tip of the connecting portion 40 and a trumpet-shaped cover 42 that protects the gas injection nozzle 10 are provided. The gun body 34 and the pressurized gas supply source 50 are connected by a flexible tube 44.
Thereby, the valve body 38 opens the flow path when the user pulls the lever 36 by hand, and the pressurized gas stored in the pressurized gas supply source 50 is injected from the tip of the gas injection nozzle 10. When the user returns the lever 36 to the original position, the valve body 38 closes the flow path, and the flow of the pressurized gas is stopped.

  As the pressurized gas, air compressed to about several MPa to several tens of MPa is generally used, or an inert gas such as nitrogen or carbon dioxide, or alternative chlorofluorocarbon may be used. When the valve body 38 is opened, the pressurized gas is depressurized and blown out from the outlet 16 of the gas injection nozzle 10 at an injection pressure of at least atmospheric pressure and less than 1 MPa.

<About gas injection nozzle>
The gas injection nozzle 10 of the present invention is formed by rotatably attaching a rotating body 14 to the tip of a fixed tube 12 fixed to a spray gun 32.
The base end (left side in the figure) of the fixed tube 12 is airtightly connected to the connecting portion 40 and communicates with the pressurized gas supply source 50 to form a pressurized gas flow path. The connection mode between the base end of the fixed tube 12 and the connecting portion 40 is not particularly limited. Screws may be formed and screwed together.
The center line shape and the cross-sectional shape of the fixed tube 12 are not particularly limited, and in this embodiment, the fixed tube 12 having a circular cross section and a straight center line shape is illustrated.

  In the present embodiment, the direction in which the tip of the fixed tube 12 extends, that is, the cross-sectional center of the fixed tube 12, and the rotation axis (AX) of the rotating body 14 coincide. However, as long as the rotating body 14 is rotatable with respect to the tip of the fixed tube 12 and the pressurized gas to be injected does not leak significantly from the gap between the fixed tube 12 and the rotating body 14, the rotating body 14 The rotation axis of the fixed tube 12 does not necessarily coincide with the center of the cross section of the fixed tube 12. Even if the rotation shaft is in an eccentric position with respect to the center of the fixed tube 12, the rotation axis of the fixed tube 12 extends and rotates. The axis may be inconsistent.

  The rotating body 14 includes a through hole 18 communicating with the fixed tube 12 therein. The fixed tube 12 and the rotating body 14 are rotatably and hermetically connected, and the pressurized gas derived from the pressurized gas supply source 50 through the fixed tube 12 is ejected from the nozzle tip 15 through the through hole 18.

  The nozzle tip 15 located at the tip (right side in the drawing) of the through hole 18 communicating with the fixed tube 12 is offset from the rotation axis (AX) of the rotating body 14 in the radial (R) direction. The nozzle tip 15 is formed with an opening 16 in a direction that intersects both the rotational axis direction and the radial direction. In other words, the injection direction, which is the normal direction of the opening surface of the outlet 16, has a rotational direction component around the rotational axis.

Thereby, when the pressurized gas stored in the pressurized gas supply source 50 is injected from the outlet 16, the nozzle tip 15 receives the injection reaction force F as shown in FIG. The integrated rotator 14 rotates around the rotation axis. In the case of the gas injection nozzle 10 shown in the figure, the outlet 16 faces the intermediate direction between the rotation axis straight direction and the rotation direction around the rotation axis. 14 will rotate with the blower outlet 16 counterclockwise seeing from the rotating shaft direction.
Therefore, the gas injection nozzle 10 moves on the circumference having the radius of the offset width of the nozzle tip 15 from the rotation axis, so that the gas injection nozzle 10 is injected with a predetermined rotation axis linear component. An effect of amplifying the pressure wave of the pressurized gas by the rotation of the outlet 16 can be obtained.

  Both the fixed tube 12 and the rotating body 14 are made of a hard material and are not significantly deformed by injection of pressurized gas. Specifically, a hard plastic material or a metal material can be used. From the viewpoint of pressure resistance and durability, a metal material such as stainless steel is used for the fixed tube 12 to reduce the moment of inertia and improve the rotation. Therefore, a hard plastic material such as polyurethane to which a plasticizer is added is suitably used for the rotating body 14.

In the gas injection nozzle 10 of this embodiment, the fixed tube 12 and the rotating body 14 are connected by a bearing 20 such as a rolling bearing or a sliding bearing.
A flange 22 is formed at the tip of the fixed tube 12. On the other hand, a housing chamber 23 capable of housing the flange 22 and the bearing 20 is provided inside the base end side of the rotating body 14. Further, on the proximal end side of the storage chamber 23, the convex portion 19 projects so as to have a smaller diameter than the flange 22 and a larger diameter than the fixed tube 12. As a result, the bearing 20 is interposed between the flange 22 and the convex portion 19 so that the fixed tube 12 and the rotating body 14 are rotatably connected with the center of the cross section of the fixed tube 12 as the rotation axis.

In the gas injection nozzle 10 of the present embodiment, a through hole 18 is configured by embedding a pipe 17 in the rotating body 14. The pipe 17 that rotates around the axis together with the rotating body 14 has a base end that coincides with or substantially coincides with the rotation axis (AX), and communicates with the fixed pipe 12 by opening to the accommodation chamber 23. Further, the tip of the pipe 17 is at a predetermined offset position from the rotation axis, and the nozzle tip 15 is bent so that the direction of the air outlet 16 as the opening end has a predetermined rotation axis direction component and a rotation direction component. Is formed.
The material and shape of the pipe 17 are not particularly limited, and for example, a circular pipe made of a hard plastic material can be used. Further, as shown in the figure, the pipe 17 may be a straight pipe that is inclined with respect to the rotation axis, or a pipe whose center line shape is curved or bent.

The gas injection nozzle 10 of this embodiment is manufactured as follows.
First, the fixed tube 12 having the flange 22 formed by expanding the diameter of the metal tube is manufactured. On the other hand, a cylindrical rotating body 14 having a base end side with a small diameter and a tip end side with a large diameter is made of a hard plastic material. The small diameter on the proximal end side coincides with the inner diameter of the convex portion 19, and the large diameter on the distal end side coincides with the inner diameter of the accommodation chamber 23 as shown by a broken line in FIG.
Next, the fixed tube 12 around which the bearing 20 is mounted is inserted into the rotating body 14 from the front end side. Since the inner diameter of the convex portion 19 of the rotating body 14 is smaller than the flange 22 of the fixed tube 12, the flange 22 serves as a stopper and the convex portion 19 and the flange 22 come into contact with each other via the bearing 20.
Subsequently, the pipe 17 whose tip is bent in the predetermined direction is temporarily fixed to the punched rotating body 14 from the tip side.
Finally, the molten resin material 25 is poured around the temporarily fixed pipe 17 to fix it to the rotating body 14, and the distal end side of the rotating body 14 is covered to cover the rotating body 14. The storage chamber 23 is left to be formed inside. The resin material 25 injected into the distal end side of the rotating body 14 may be the same material as the rotating body 14 or a different material.

As described above, since both the fixed tube 12 and the rotating body 14 are made of a hard material and are connected to each other by the bearing 20, each component is not deformed by the injection reaction force of the pressurized gas. There is no internal loss of injection energy.
Further, the rotating body 14 is formed in a columnar shape with the rotation axis as the center, and the nozzle tip 15 and the outlet 16 are formed so as to be within the plane of the end surface on the tip side of the rotating body 14, thereby rotating the rotating body 14. Has no projecting portion in the radial direction, and the gas injection device 30 of the present invention can be used safely for the user or those around him.

  In addition, in the gas injection device 30 of the present invention, a cover 42 configured in a trumpet shape or the like is provided on the side in the radial direction of the rotating body 14 as shown in FIG. Also good. Since the cover 42 used in the present invention does not come into contact with the rotating body 14, the inner surface thereof is not soiled or the rotating body 14 is not worn. Therefore, the shape of the cover 42 is not particularly limited as long as it does not come into contact with the rotating rotator 14, but the cover 42 is used to suppress the excessive diffusion of the pressurized gas injected from the swiveling outlet 16. The tip may be protruded like a bowl from the outlet 16 toward the tip. The cover 42 is attached to, for example, the connecting portion 40 of the gun body 34. The cover 42 may be detachable from the gun body 34.

  In the present invention, the through hole 18 may be provided by forming a through hole in the solid rotating body 14. Alternatively, the rotator 14 may be divided in half, and the pair of halved rotators 14 may be joined and integrated in a state where the fixed tube 12 and the bearing 20 are fitted to the rotator 14.

  In addition, in the present invention, the pipe 17 may be exposed to the outside without being embedded in the rotating body 14. That is, the pipe 17 formed so that the tip is offset in the radial direction from the rotation axis and the opening direction has at least a rotation direction component may be made of a hard material and used as the rotating body 14. Further, when the rotating body 14 is rotatably attached to the tip of the fixed tube 12, the rotating body 14 may be directly joined so as to be slidable without using a bearing. It may be integrated.

<About other embodiments>
FIG. 3A is a partial vertical cross-sectional schematic diagram (side view) regarding the tip of the gas injection nozzle 10 of the second embodiment of the present invention, and FIG. 3B is a front view thereof. The view along arrow AA in FIG. 3B corresponds to FIG.
In the present embodiment, the pipe 17 embedded in the rotating body 14 is bifurcated toward the tip (right side in the figure), and each tip is bent to be provided with nozzle tips 15a and 15b. The air outlets 16a and 16b are different from those of the first embodiment (see FIG. 2) in that openings are formed.

In the figure, the lower half and the upper half of the rotating body 14 have a rotationally symmetric shape about the rotation axis (AX). Accordingly, the two nozzle tip portions 15a and 15b and the outlets 16a and 16b are arranged at rotationally symmetric positions around the rotation axis. The lower blower outlet 16a is opened toward the intermediate direction between the rotation axis direction and the left direction in FIG. Moreover, the upper blower outlet 16b is opened toward the intermediate direction of a rotating shaft direction and the right direction of the same figure (b). In other words, the two outlets 16a and 16b are both formed at the tip of the rotating body 14 with the same rotational direction component around the rotational axis.
As a result, when the pressurized gas supplied through the through-hole 18 in the fixed pipe 12 is injected from the outlets 16a and 16b, the reaction force F received by the rotating body 14 is indicated by → in FIG. As shown, the rotation direction is counterclockwise when viewed from a common rotation direction, specifically, the rotation axis direction.

  Thus, by providing a plurality of outlets 16a, 16b at rotationally symmetric positions around the rotation axis and directing each opening in the same rotational direction, the components in the rotational direction of the jetting reaction force of the pressurized gas are added together, Since the radial component is canceled out, the rotating body 14 rotates well around the rotation axis without being eccentric in the radial direction with respect to the fixed tube 12 or oscillating.

In the present invention, the fact that the plurality of air outlets are directed in the same rotational direction means that the pressurized gas injected from one of the air outlets interferes with the pressurized gas injected from the other air outlets. This means a state in which the reaction force acting on the rotating body 14 is not canceled out, and does not require exact matching of the opening directions.
The same applies to the rotationally symmetric positions around the rotation axis where the plurality of air outlets are arranged, and it is sufficient if the plurality of air outlets are arranged in a balanced manner around the rotation axis.

  In the present embodiment, one pipe 17 is branched and a plurality of air outlets 16a and 16b are formed at the tip thereof. However, in the present invention, one each of the other air outlets is also provided. A plurality of pipes 17 having outlets may be rotatably attached directly to the tips of one or a plurality of fixed pipes 12 or indirectly via other connecting members. Alternatively, a plurality of through holes 18 may be formed in the solid rotating body 14, and the air outlets 16a and 16b may be formed at the respective ends as in the present embodiment.

FIG. 4A is a partial vertical cross-sectional schematic diagram (side view) regarding the tip of the gas injection nozzle 10 of the third embodiment of the present invention, and FIG. 4B is a front view thereof. 4A corresponds to FIG. 4A.
The rotating body 14 of the present embodiment is provided with an axial fan (fan) 52 around it, and when the rotating body 14 is rotated by jetting of pressurized gas, the fan 52 flows toward the rotation axis direction (AX). Is different from the first embodiment (see FIG. 2).

Thereby, in the gas injection nozzle 10 concerning 3rd embodiment, the radial direction (R) component of the pressurized gas injected from the blower outlet 16 may be excessive, and a rotating shaft (AX) direction component may become inadequate. Even if there is, an axial flow is generated by providing the fan 52 in the rotating body 14 as in this embodiment, and the rotation of the rotating body 14 is suppressed by the reaction force, and together with the axial flow, the rotational axis direction A sufficient injection force can be obtained.
That is, by suppressing excessive rotation of the rotating body 14 by the fan 52, the diffusion of the pressurized gas is suppressed, and the injection force in the rotation axis direction is improved. Therefore, from this point of view, it is possible to adjust the injection force in the direction of the rotation axis only by providing a rotational resistance that suppresses the rotation of the rotating body 14, and an axial fan is provided on the rotating body 14 as in this embodiment. Thus, the rotational resistance generated in the rotating body 14 is not simply lost, but is converted into a jet flow in the direction of the rotation axis to assist the injection force of the pressurized gas.

As a further modification of the gas injection nozzle 10 of the present embodiment, the fan 52 may be detachable from the rotating body 14. Thereby, according to the use of the gas injection apparatus 30, the injection force to a rotating shaft direction can be adjusted arbitrarily.
From the same viewpoint, the twist angle of the fan 52 and the mounting angle with respect to the rotating body 14 may be variably adjustable.

FIG. 5A is a partial vertical cross-sectional schematic view (side view) relating to the tip of the gas injection nozzle 10 of the fourth embodiment of the present invention, and FIG. 5B is a front view thereof. The view along arrow A-A in FIG. 5B corresponds to FIG.
In this embodiment, the rotating body 14 includes a brush 54 that protrudes from the tip thereof. Therefore, when the rotating body 14 is rotated by the jetting reaction force F of the pressurized gas, the brush 54 is also rotated around the rotation axis, so that the surface to be ejected can be physically wiped in the rotation direction using the brush 54. it can. Further, since the brush 54 is bent in the radial direction by the expansion and rotation diffusion of the pressurized gas injected from the rotating outlet 16, the wiping of the sprayed surface by the brush 54 is a combination of the rotation direction and the radial direction. It becomes.
Therefore, when the gas injection device 30 is used as a dust blower for dust removal, according to the gas injection nozzle 10 of the present embodiment, the dust adhered firmly is physically wiped from the vertical and horizontal directions by the brush 54 and is removed from the injection target surface. This can be blown away by blowing pressurized gas while peeling.

Various modes can be adopted for attaching the brush 54 to the rotating body 14. As shown in the figure, by providing the rotary shaft (AX) side from the blower outlet 16, the pressurized gas injected from the blower outlet 16 is prevented from flowing to the rotary shaft side (center direction), and is on the extension line of the rotary shaft. Since the spraying force can be applied to the captured dust so as to surround the periphery of the captured dust, the effect of the present invention to lift and remove the dust is further enhanced.
Further, the brush 54 may be mounted on the peripheral surface of the rotating body 14 so that the tip of the brush 54 protrudes from the air outlet 16 in addition to a mode in which the brush 54 is planted at the tip of the rotating body 14 as illustrated.

It is a partial longitudinal cross-sectional schematic diagram (side view) of the gas injection nozzle 10 of 1st embodiment of this invention, and the gas injection apparatus 30 provided with this at the front end side. (A) is the fragmentary longitudinal cross-section schematic diagram (side view) of the gas injection nozzle 10 of 1st embodiment, (b) is the front view. (A) is the fragmentary longitudinal cross-section schematic diagram (side view) of the gas injection nozzle 10 of 2nd embodiment, (b) is the front view. (A) is the fragmentary longitudinal cross-section schematic diagram (side view) of the gas injection nozzle 10 of 3rd embodiment, (b) is the front view. (A) is the fragmentary longitudinal cross-section schematic diagram (side view) of the gas injection nozzle 10 of 4th embodiment, (b) is the front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Gas injection nozzle 12 Fixed pipe 14 Rotating body 15 Nozzle front-end | tip 16 Outlet 17 Pipe 18 Through-hole 20 Bearing 30 Gas injection apparatus 32 Spray gun 38 Valve body 50 Pressurized gas supply source 52 Fan 54 Brush

Claims (5)

A gas injection nozzle for injecting a pressurized gas stored in a pressurized gas supply source while diffusing from a rotating outlet,
A fixed pipe whose base end communicates with the pressurized gas supply source, and a rotating body that is made of a hard material and has a through hole that communicates with the fixed pipe, and is rotatably provided with respect to the distal end of the fixed pipe; Have
The rotating body includes a fan that generates an axial flow in the rotation axis direction by the rotation of the rotating body,
At the tip of the rotating body, an opening is formed at the position offset in the radial direction from the rotating shaft of the rotating body in a direction that intersects both the rotating shaft direction and the radial direction. A gas injection nozzle characterized by.   The gas injection nozzle according to claim 1, wherein the fixed pipe and the rotating body are connected via a bearing.   The rotating body has a plurality of air outlets respectively communicating with the fixed pipe at rotationally symmetric positions with respect to the rotation axis, and the plurality of air outlets are directed around the rotation axis in the same rotation direction. The gas injection nozzle according to claim 1 or 2, wherein the gas injection nozzle is formed. The gas injection nozzle according to any one of claims 1 to 3 , wherein the rotating body has a brush protruding from a tip of the rotating body. (A) a pressurized gas supply source in which pressurized gas is stored;
(B) The base end is provided with a fixed tube communicating with the pressurized gas supply source and a through hole made of a hard material and communicating with the fixed tube, and is provided rotatably with respect to the distal end of the fixed tube. A rotating body , and the rotating body includes a fan that generates an axial flow in the direction of the rotating shaft by the rotation of the rotating body, and the tip of the rotating body extends radially from the rotating shaft of the rotating body. A gas injection nozzle having an outlet formed in an offset position in a direction that intersects both the rotational axis direction and the radial direction;
(C) a valve body that closes or opens the flow of the pressurized gas from the pressurized gas supply source to the fixed pipe,
A gas injection device characterized in that, by rotating the rotating body around a rotation axis by the pressurized gas to be injected, the pressurized gas is injected from the outlet while being diffused.