CN113164992A

CN113164992A - Nozzle and gas ejection device

Info

Publication number: CN113164992A
Application number: CN201980066316.1A
Authority: CN
Inventors: 小林正树
Original assignee: Chunxin Co ltd
Current assignee: Chunxin Co ltd
Priority date: 2018-10-08
Filing date: 2019-10-01
Publication date: 2021-07-23
Also published as: JP2020148455A; JPWO2020075567A1; JP2020148454A; WO2020075567A1; JP6749741B6; JP6749741B1

Abstract

A nozzle for ejecting gas toward an object and a gas ejection device are provided. A nozzle (120) of the present invention is a nozzle that jets an air flow while rotating, and is provided with: a rotating body (126) which is provided with a fluid flow path for taking in gas and is rotatably held; a nozzle member (127) which extends without being blocked from the rotating body (126) and which injects gas from the orifices (121a, 12 ab); a protective cover (130) for accommodating the rotary body (126) and the nozzle member (127); and a bottom plate (131) delimiting a space inside the protective cover accommodating the apertures (121a, 121 b); the nozzle member (127) is joined to the rotating body (126), and is bent from a joint portion with the rotating body (126) while maintaining the inner diameter of the nozzle member (127) and extends to the orifices (121a, 121 b).

Description

Nozzle and gas ejection device

Technical Field

The present invention relates to a nozzle and a gas ejection device for ejecting gas toward an object.

Background

Objects such as a HDD (hard disk) case, a food tray, a parts tray, an accessory container, and industrial precision parts are washed with an aqueous cleaning solution, washed with pure water, and then dried. In order to achieve efficient production processes, drying needs to be performed in a short time. In order to dry them, air is generally sprayed to the cleaning object through a spray nozzle.

However, it is difficult to drain water remaining in the depressions during drying after cleaning an uneven cleaning object such as a tray. In order to perform such drainage, various studies have been made, such as raising the cleaning object, conveying the cleaning object so that water naturally falls downward from the cleaning object and flows out, ejecting air for a long time, raising the temperature of the air, and the like.

In the automobile parts industry and the like, machined chips and cutting oil of machine parts and the like are blown off and removed by an air gun.

As a nozzle used for such an application, for example, an air spiral nozzle described in japanese patent No. 4783467 (patent document 1) can be cited.

The air screw nozzle described in patent document 1 includes an intake pipe for introducing compressed air, an air reservoir disposed at a distal end of the intake pipe, and a nozzle connected to the air reservoir. The tip of the nozzle is configured to protrude from the surface of the air reservoir in the direction of the object. The air spiral nozzle described in patent document 1 can perform a certain degree of cleaning and drying treatment, but in order to meet recent demands for high productivity, it is required to improve the nozzle so as to generate a gas flow for cleaning and drying with high efficiency.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 4783467.

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide a nozzle and a gas ejection device that further improve the hydrodynamic characteristics of the air ejection surface of the nozzle, and generate a high-speed/high-pressure gas flow to eject the gas toward an object.

Means for solving the problems

According to the present invention, there is provided a nozzle which rotates and simultaneously injects an air flow, the nozzle including: a rotating body which is provided with a fluid flow path for receiving a gas and is rotatably held; a nozzle member having an inside extending without being shielded from the rotating body and ejecting the gas from an orifice; a protective cover for accommodating the rotary body and the nozzle member; and a bottom plate defining a space for accommodating the aperture inside the protective cover; the nozzle member is joined to the rotating body, and is bent from a joint portion with the rotating body while maintaining an inner diameter of the nozzle member, and extends to the orifice.

The nozzle member may extend between the fluid flow path and the orifice, and may extend obliquely in the circumferential direction and the vertical direction with respect to the bottom plate.

The nozzle member can be inclined at 5 to 60 ° with respect to the vertical and extend to the bottom plate.

Preferably, the cross-sectional area S of the lowermost portion of the fluid flow path and the cross-sectional area S of the nozzle member₁Ratio S/S₁Is 2 to 100.

The upper end of the fluid flow path may extend to a position lower than the upper end of the nozzle to provide a space.

The fluid flow path may be formed to have a diameter enlarged up to the nozzle member.

According to the present invention, a gas discharge device in which a plurality of nozzles are arranged in proximity to each other includes: a frame body, wherein the nozzles are arranged close to each other so as not to obstruct the rotation of the nozzles, and all the nozzles rotate in the same direction; and the nozzle, comprising: a rotating body which is provided with a fluid flow path for receiving a gas and is rotatably held; a nozzle member having an inside extending without being shielded from the rotating body and ejecting the gas from an orifice; a protective cover for accommodating the rotary body and the nozzle member; and a bottom plate defining a space for accommodating the aperture inside the protective cover; the nozzle member is joined to the rotating body, and is bent from a joint portion with the rotating body while maintaining an inner diameter of the nozzle member, and extends to the orifice.

The bent pipe may extend between the fluid flow path and the orifice, and may extend obliquely in the circumferential direction and the vertical direction with respect to the bottom plate.

The nozzle member may also be inclined at 5 to 60 ° to the vertical and extend to the floor.

The cross-sectional area S of the lowest part of the fluid flow path and the cross-sectional area S of the nozzle member can be set₁Ratio S/S₁Is 2 to 100.

Drawings

Fig. 1 is a bottom view of a gas discharge device 100 mounted with a nozzle of the present invention.

Fig. 2 is a plan view of the gas ejection device 100 of the preferred embodiment as viewed from the direction of arrow C in fig. 1.

Fig. 3 is a schematic diagram showing the arrangement of the nozzles 120 and 121 in the preferred embodiment.

Fig. 4 is a diagram showing a detailed configuration of the nozzle 120 of the present embodiment.

Fig. 5 is a diagram showing a second embodiment of the gas ejection device 140 of the present embodiment.

Fig. 6 is a diagram showing a gas ejection device 160 according to a third embodiment of the present embodiment.

Detailed Description

The present invention will be described below with reference to preferred embodiments, but the present invention is not limited to the preferred embodiments described below. Fig. 1 shows a bottom view of a gas discharge device 100 mounted with a nozzle of the present invention. The gas discharge device 100 includes a housing 110 and a nozzle 120 disposed inside the housing 110 in a plan view. The frame body 110 can be fixed to, for example, a frame (not shown) of a washing/drying system via bolt holes 111 formed in the frame body 110.

The bottom surface of the nozzle 120 is formed by a flat bottom plate 131, and orifices 121a and 121 for ejecting air are formed in the bottom plate 131. At the bottom plate 131 at the part of the

apertures

121a, 121b, there is formed an opening 121c of a larger diameter than the

apertures

121a, 121b, the

apertures

121a, 121b being positioned at the position of the opening 121 c. The bottom plate 131 is fixed to the inside of the housing 110 so as not to protrude toward the object side.

The nozzle 120 includes a rotating body 126 and a protective cover 130 for protecting the rotating body 126 from the outside, and in a preferred embodiment, the protective cover 130 shields a member rotating at high speed such as the rotating body 126 and the

orifices

121a and 121b from the outside. Further, the position of the opening 121c relative to the

apertures

121a, 121b is schematically shown in fig. 1 when viewed from the bottom surface. However, the

orifices

121a, 121b do not protrude from the bottom surface of the nozzle 120, but are positioned at the level of the lowest part of the nozzle 120. The detailed configurations of the protective cover 130, the bottom plate 131, the rotary body 126, and the

orifices

121a and 121b constituting the nozzle 120 will be described later.

The inside of the housing 110 constitutes a gas reservoir for temporarily accumulating gas supplied from a compressor or a blower, not shown, equalizing the pressure, and then supplying the gas to the plurality of nozzles 120 attached to the housing 110.

Air, argon gas, nitrogen gas, or other gas pressurized by a compressor or introduced by a blower is injected from the nozzle 120 toward the object, and in the embodiment shown in fig. 1, the gas is slightly ejected toward the protective cover 130 side in the direction of the arrow a rather than the tangential direction. The nozzle 120 rotates in the direction of the arrow B opposite to the direction of the arrow a by the reaction of the ejection pressure of the gas. The rotation of the nozzle 120 moves the positions of the

orifices

121a, 121b in the circumferential direction, and causes the nozzle 120 to rotate with respect to the object disposed on the downstream side of the nozzle 120 while jetting.

Further, the pressure of the gas supplied to 120 in the present embodiment can be 0.2 to 1.5 MPa, and in a preferred embodiment, in the range of 0.3 to 1 MPa. In addition, the rotational torque generated with respect to the nozzle 120 at this time can be 3 kg/cm to 20 kg/cm. In order to reduce the operating power of the gas discharge device 100 and achieve low carbon consumption, it is preferable to use a blower as compared with a compressor that consumes more power.

In the preferred embodiment shown in fig. 1, two

orifices

121a, 121b are formed per nozzle 120, but the number thereof is not particularly limited as long as the required gas velocity can be obtained. Further, the

orifices

121a and 121b are arranged to be centrosymmetric with respect to the center of the nozzle 120, and generate rotational torque without offset with respect to the nozzle 120.

In a preferred embodiment, the orifices 21a and 121b are configured to eject gas radially outward from the tangential direction of the positions where the

orifices

121a and 121b are arranged, and to form an efficient swirling flow in the lower space of the nozzle 120. Further, in other embodiments, the arrangement angle of the

apertures

121a, 121b may be a tangential direction, or may be more toward the center side than the tangent line.

An air inlet portion (not shown) and a mounting portion (not shown) configured to rotatably hold the nozzle 120 are disposed on the back side of the nozzle 120 in the paper surface direction, and the nozzle 120 is rotatably held while supplying gas to the nozzle 120. Further, in the preferred embodiment shown in fig. 1, the nozzles 121 are arranged so that the adjacent nozzles 120 rotate in the same direction. Therefore, the relative rotation speed between the two nozzles 120 is twice the rotation speed of the nozzles 120, and the penetration of the gas penetrating into the gap between the adjacent nozzles 120 is prevented by the viscous resistance accompanying the rotation of the mutually opposed nozzles 120, and as a result, another air flow toward the object direction is formed, and the cleaning efficiency can be further improved.

Fig. 2 is a plan view of the gas ejection device 100 of the preferred embodiment as viewed from the direction of arrow C in fig. 1. The nozzle 120 is arranged to rotate from the right-hand side to the left-hand side of the drawing. In addition, the gas is ejected in the opposite direction in response thereto. In the gas discharge apparatus 100, the two nozzles 120 are disposed in the housing 110 so as not to interfere with the rotation of each other. An air supply member 112 is disposed above the housing 110, and supplies gas from a compressor (not shown) or a blower to the nozzle 120 through the

orifices

121a and 121b of the nozzle 120 as indicated by an arrow D. In fig. 2, for the sake of explanation, the air flow is described as an air flow toward the left orifice 121a, but in a preferred embodiment, the gas is equally supplied to the left and

right orifices

121a and 121 b.

In addition, the orifices 121a, 12ab do not project with their front ends from the lowest part of the nozzle 120, in the preferred embodiment are positioned at the level of the lowest part of the nozzle 120. Further, since the

orifices

121a and 121b themselves are disposed inside the lowest portion, there is no structure that interferes with the air flow on the object side of the nozzle 120, and an interference flow is not formed in the space up to the object, and a high-speed gas flow can be efficiently supplied to the object 200.

The orifice 121a on the left-hand side of fig. 2 is formed to be inclined and shut off the nozzle member 127 so that the upstream side in the rotational direction of the orifice 121a becomes long so that the orifice 121a does not face the rotational direction. The cutting angle of the nozzle member 127 is not particularly limited as long as the downstream side in the rotation direction of the cut surface and the upstream side in the rotation direction are flush with each other on a horizontal plane, or the cut surface of the nozzle member 127 is inclined with respect to the horizontal plane, the upstream side in the rotation direction extends to the vicinity of the bottom, and the downstream side in the rotation direction is farther from the bottom.

Further, in the nozzle 120, a space formed between the base plate 131 and the protective cover 130 that shields the movable portion of the nozzle 120 including the base plate from the outside provides a function like a nozzle cone for the gas to be ejected, and a swirling flow descending toward the object 200 is formed while swirling, and the gas is efficiently ejected toward the object 200.

The object 200 is configured to flow through the pipeline in a manner crossing the nozzles 120, and the nozzles 120 paired side by side in a direction crossing the flow direction of the pipeline eject gas toward the object 200.

Fig. 3 is a schematic view showing the arrangement of the nozzle 120 with respect to the housing 110 in the preferred embodiment, as viewed from the direction of the arrow E in fig. 1. The nozzle 120 is held by a suitable frame or the like of the gas ejection device 100, and the nozzle 120 is held to rotate at a high speed. The

orifices

121a, 121b of the nozzle 120 are arranged in central symmetry with respect to the center of the nozzle 120, and on opposite sides, respectively, are arranged inclined by θ =30 ° with respect to the vertical in a preferred embodiment. The nozzle member 127 providing the orifice 121b shown in fig. 3 is arranged on the back side of the sheet, and is thus shown by a broken line. In addition, the

orifices

121a, 121b are arranged so as to be "chamfered" with respect to the central axis, and the air streams ejected through the

orifices

121a, 121b are not disturbed in the vicinity of the

orifices

121a, 121b by the air streams impinging from the upstream side in the rotation direction.

The gas streams ejected from the

orifices

121a, 121b collide at an angle θ =30 ° with respect to the object 200, blowing off the attachments such as dust, swarf, water droplets, or other foreign substances on the object 200, enabling cleaning/drying or other treatment of the surface. Further, the inclination angle with respect to the vertical direction of the

apertures

121a, 121b is an exemplary angle, and can be arbitrarily set in the range of 5 ° to 60 ° with respect to the vertical, for example. When θ is reduced, the rotational biasing force is reduced, and the efficiency of generating the swirling flow toward the object is reduced; if θ is excessively increased, the ejection pressure with respect to the object 200 is reduced, and thus the cleaning efficiency is reduced.

Fig. 4 is a diagram showing a detailed configuration of the nozzle 120 of the present embodiment. Fig. 4(a) is a view showing a side surface structure inside the nozzle 120 as a partial cross section. Fig. 4(b) is a bottom view of the nozzle 120, and also shows a planar structure of the lower portion of the nozzle 120. As shown in fig. 4(a), the nozzle 120 includes a fixing portion 122, an air inlet portion 123, a rotating body 120, and a protective cover 130. The rotary body 126 is rotatably held inside the air intake portion 123 via a bearing 124. The inner wall of the rotating body 126 defines a fluid flow path L through which the gas to be discharged passes. The bearing 124 can be a thrust bearing, but any other configuration of bearing can be utilized.

The fixing portion 122 has a function of fixing the nozzle 120 to the frame of the gas ejection device 100, and has an opening 122a formed at the center thereof for supplying gas to the fluid flow path L. A minute gap 122a is formed between the upper end of the fixing portion 122 and the upper end of the rotating body 126, and prevents the rotation of the rotating body 126 from being hindered by the upward pressure. Further, the gap 122a allows the rotor 126 to be slightly displaced upward by the gas pressure discharged from the

orifices

121a and 121b, and the load on the bearing is reduced, thereby facilitating high-speed rotation.

The air inlet 123 provides a bearing holding space, and the bearing 124 is doubly disposed between the outer wall 125 of the rotating body 126 and the inner wall 125a of the air inlet 123, thereby enabling the rotating body 126 to rotate at high speed. The rotary body 126 is rotatably disposed inside the air intake portion 123, and introduces gas into a fluid flow path L formed in the center thereof.

Orifices

121a and 121b are formed on the lower side of the rotating body 126, and the gas supplied through the fluid flow path L of the rotating body 126 is ejected toward the object.

Further, in fig. 4, the arrangement of the aperture 121b with respect to the rotational direction (from the right-hand side to the left-hand side of the paper) is shown as a cross section, and in detail, the front side of the paper is extended to the vicinity of the bottom plate 131, and the back side of the paper is terminated at a position distant from the bottom plate 131. However, the inclination of the

orifices

121a, 121b with respect to the horizontal plane forms shadows in the

orifices

121a, 121b with respect to the rotation direction of the nozzle 120, and is not particularly limited as long as the air flow accompanying the movement of the

orifices

121a, 121b is at such an angle that the air flow accompanying the rotation does not interfere with the gas flow ejected from the

orifices

121a, 121 b. For example, if the angle is α, the range from θ to (180- θ) ° in the clockwise direction with respect to the horizontal plane can be used for the purpose of reducing the cross-sectional area of the distal end portions of the

orifices

121a and 121b and increasing the rotation speed.

Further, the fluid flow path L is formed so as to have a diameter gradually increasing from the upper portion of the rotating body 126 toward the rear of the

orifices

121a and 121b, and is disposed so as not to hinder the increase in the dynamic pressure of the gas.

The nozzle member 127 extends from the bottom of the rotating body 126 toward the bottom plate 131, and the

ports

121a and 121b are exposed from the bottom plate 131 at an angle θ at the front end of the nozzle member 127. The nozzle member 127 is formed of a rigid material such as a metal pipe, and the other end of the orifice 121a of the nozzle member 127 is directly joined to the rotary body 126 by welding, brazing, soldering, or the like without blocking the diameter of the fluid flow path L in the vicinity of the bottom of the rotary body 126. The nozzle member 127 is directly joined to the rotating body 126 without using an interface, and thus the inner diameter of the nozzle member 127 can be maintained while being held to the

ports

121a and 121b, the pressure chamber can be minimized, and gas can be transported. Further, by directly engaging the nozzle member 127 with the rotary body 126, the size of the nozzle 120 can be reduced and the nozzle can be rotated at high speed, and the change in the injection angle θ and the durability due to the long-term high-speed rotation can be improved.

The nozzle member 127 is displaced in the height direction and the radial direction from the horizontal to the vertical direction between the fluid flow path from the rotary body 126 to the ports 121a, b, extends while being inclined by 30 ° with respect to the vertical toward the bottom plate 131, and extends to a position where the

ports

121a, 121b protrude from the bottom plate 131. In a preferred embodiment, the

orifices

121a and 121b are cut by inclining the nozzle member 127 so that the upstream side of the cut surface in the rotational direction extends lower than the downstream side with respect to the rotational direction of the nozzle 120, and are arranged so that the orifices 121a and 12ab are not exposed to the rotational direction so as to be inclined with respect to the central axis of the nozzle member 127.

In other words, the

orifices

121a, 121b are configured to be shielded from the air flow accompanying the rotation of the nozzle 120 by a wall on the upstream side in the rotation direction with respect to the rotation direction of the nozzle 120. The angle of the chamfer is not particularly limited as long as the wall on the upstream side in the rotation direction of the nozzle member 127 can shield the

orifices

121a, 121b, and in a preferred embodiment, can be an angle in the range of, for example, 20 ° to 160 ° with respect to the horizontal plane. Further the angle is defined in a direction that can shade the

apertures

121a, 121 b.

In fig. 4, the

orifices

121a and 121b are arranged at an inclination of 30 ° with respect to the bottom plate 131 of the nozzle 120, and the

orifices

121a and 121b are cut off perpendicularly to the central axis of the nozzle member 127, and as a result, the ends on the downstream side in the rotational direction of the

orifices

121a and 121b are arranged at an upper side of 30 ° with respect to the horizontal plane than the ends on the upstream side in the rotational direction.

In other embodiments, other shapes and angles are possible, further taking into account aerodynamic characteristics, with the angle θ being in the range of 5 to 60 °, more preferably 20 ° to 40 °. The

apertures

121a and 121b extend beyond the bottom surface of the opening 121c (not shown) shown in fig. 1 to the level of the lowermost portion of the frame body 110, and the front ends thereof are accommodated in the space between the frame body 110 and the bottom plate 131.

Further, a stud 128 for fixing a rotating plate 132 is formed at a lower portion of the rotating body 126, and a bottom plate 131 can be fixed by a screw 129 through a pedestal portion. As shown in fig. 4(a), in a preferred embodiment, the bottom plate 131 provides a space that provides a nozzle cone function between the lowest portion of the frame 110 and the bottom plate 131, so that the nozzle 120 can efficiently eject a high-pressure/high-speed gas flow against the object 200.

Fig. 4(b) shows the bottom structure of the nozzle 120 of the preferred embodiment together with its internal arrangement. The nozzle 120 is provided with a nozzle member 127 accommodated inside the protective cover 130 and extending radially with the center thereof being symmetrical with respect to the rotary body 126, and the nozzle member 127 has

orifices

121a and 121b formed at one end thereof and the other end thereof communicating with the fluid flow path L of the rotary body 126.

Further, an opening 121c (not shown) is formed in a position where the

openings

121a and 121b of the bottom plate 131 are disposed, so as not to obstruct the ejection of air from the

openings

121a and 121b, thereby enabling the ejection of air to the object 200. Further, the connection of the nozzle member 127 to the rotary body 126 is integrated by fusion bonding W, so that the loosening of joints such as the mouthpiece due to long-term high-speed rotation is prevented, the performance is prevented from being deteriorated, the amount of gas flowing into the nozzle member 127 due to the introduction of the mouthpiece structure is prevented from being reduced, the pressure loss before and after the mouthpiece is prevented, and the gas can be sent to the

ports

121a and 121 b.

As understood from the configuration shown in fig. 4, the nozzle 120 of the preferred embodiment is supplied to the nozzle 127 without a structure that blocks the gas supplied to the fluid flow path L formed in the inner wall of the rotating body 126. Therefore, if the sectional area of the lowest part of the fluid flow path L is S and the sectional area of the nozzle member 127 is S, the gas supplied to the fluid flow path L at a constant flow V/S is supplied to the nozzle member 127₁Then at about V due to the continuous mode of the fluid_out=V×S/S₁Through the nozzle member 127. That is, the nozzle 120 of the present embodiment efficiently converts the static pressure of the gas injected to the object 200 into the dynamic pressure.

For example, the cross-sectional area of the lowermost part of the fluid flow path L is set to 400 π mm²The internal diameter of the nozzle member 127 is 9 π mm²The air passes through the

orifices

121a and 121b at a speed about 40 times the speed of the air supplied to the fluid flow path L, and the air flow can be efficiently accelerated. This also efficiently converts the static pressure of the gas supplied to the fluid flow path L into a dynamic pressure, and minimizes the pressure loss when the gas passes through the nozzle member 127. Further, since the nozzle member 127 is formed with a minimum curvature to minimize pressure loss, the flow velocity of the air can be efficiently increased while minimizing pressure loss and intake resistance from the fluid flow path L to the

orifices

121a and 121 b.

Further, in the preferred embodiment, the area ratio of the inner diameter of the lowermost portion of the fluid flow path L to the inner diameter of the nozzle member 127 depends on the viscous resistance, S/S, of the ejected gas₁Can be 2 to 100, and is in the range of 5 to 60, considering the pressure loss of the nozzle member 127 and the flow rate of the gas ejected from the

orifices

121a, 121 b.

Further, since the pressure loss is increased and the pressure loss is generated even when the length of the nozzle member 127 is too long and the curve is steep, the length of the nozzle member 127 is preferably about 0.5 to 3 times as long as the fluid flow path L, and the curve is inclined at a predetermined angle from the fluid flow path L horizontally and vertically with respect to both the height direction and the radial direction.

Fig. 5 is a diagram showing a second embodiment of the gas ejection device 140 of the present embodiment. The gas ejection device 140 according to the second embodiment is mounted with four nozzles 120 in a housing 150, and can be fixed to a frame (not shown) of a cleaning/drying system or the like by bolt holes 161. The nozzles 120 are configured to rotate in the direction of arrow B. As a result, in the area adjacent to the nozzle 120 of the gas ejection device 140, as understood from fig. 5, the air flow toward the object is generated in the vicinity of the center portion with the rotation of the nozzle 120, and more efficient cleaning and drying becomes possible.

Fig. 6 is a diagram showing a gas ejection device 160 according to a third embodiment of the present embodiment. The gas discharge device 160 according to the embodiment of fig. 3 is supplied with compressed air from a compressor, and two nozzles 120 are mounted on a frame 170 and can be fixed to a frame (not shown) of a cleaning/drying system or the like by bolt holes 171. The nozzle 120 has a diameter of 75 mm, and is configured to facilitate high speed. The nozzles 120 are configured to rotate in the direction of arrow B.

The two nozzles 120 are arranged with respect to the center line of the forward direction, and the injection ranges of the nozzles 120 overlap. As a result, as can be understood from fig. 6, the area including the gas ejection device 150 adjacent to the nozzle 120 can more efficiently generate the air flow toward the object in the vicinity of the center portion, and the cleaning/drying efficiency can be improved. The object 200 is processed by being ejected with gas by two pairs of nozzles 120 between the nozzles 120 arranged so as to intersect the flow direction.

At this time, in the lower portion of the frame 110, the space formed by the bottom plate 131 and the protective cover 130 functions as a nozzle cone for efficiently directing the gas ejected from the

orifices

121a and 121b toward the object 200, and further, the gas ejected from the

orifices

121a and 121b can be directed toward the object 200 as a swirling flow while being inclined, thereby efficiently directing the gas toward the object 200.

In other embodiments, an air knife nozzle may be added to the bottom surface according to a specific application, and a nozzle having another shape may be added.

The present embodiment has been described above, but the present invention is not limited to the above-described embodiment, and can be modified within a range that can be conceived by a person skilled in the art, such as other embodiments, addition, modification, and removal, and the scope of the present invention is included in any form as long as the operation and effect of the present invention are achieved.

Industrial applicability

According to the present invention, it is possible to provide a nozzle and a gas ejection device that can further improve the hydrodynamic characteristics of the air ejection surface of the nozzle, and further generate a high-speed/high-pressure gas flow to eject the gas toward an object.

Description of the symbols

100 gas spraying device

110 frame body

111 bolt hole

112 air supply unit

120 nozzle

121a, b orifice

121c opening

122 fixed part

123 air inlet part

124 bearing

126 rotating body

127 nozzle component

128 stud

129 screw

130 protective cover

131 bottom plate

L fluid flow path.

Claims

1. A nozzle that rotates and simultaneously ejects an air flow, the nozzle comprising:

a rotating body which is provided with a fluid flow path for receiving a gas and is rotatably held;

a nozzle member, which extends without being shielded from the rotating body and injects the gas from an orifice;

a protective cover for accommodating the rotary body and the nozzle member; and

a bottom plate defining a space for receiving the aperture inside the protective cover;

the nozzle member is joined to the rotating body, bent from a joining portion with the rotating body maintaining an inner diameter of the nozzle member, and extended to the orifice.

2. The nozzle according to claim 1 wherein said nozzle component extends between said fluid flow path and said orifice, is inclined and extends relative to said floor in a circumferential and vertical direction.

3. The nozzle of claim 1 or 2 wherein said nozzle component is inclined 5 to 60 ° from vertical and extends to said floor.

4. A nozzle according to any one of claims 1 to 3, wherein the cross-sectional area S of the lowermost portion of the fluid flow path and the cross-sectional area S of the nozzle component₁Ratio S/S₁Is 2 to 100.

5. The nozzle of any one of claims 1 to 4, wherein an upper end of the fluid flow path extends to a lower position than an upper end of the nozzle to provide a spacing.

6. The nozzle according to any one of claims 1 to 5, wherein the fluid flow path is formed to expand in diameter up to the nozzle component.

7. A gas discharge device in which a plurality of nozzles are arranged in proximity to each other, comprising:

a frame body in which the nozzles are arranged close to each other so as not to hinder rotation of the nozzles, and which rotate in the same direction; and

the nozzle is provided with:

a protective cover for accommodating the rotary body and the nozzle member; and

8. The gas ejection device according to claim 7, wherein the bent pipe extends between the fluid flow path and the orifice, is inclined and extends in a circumferential direction and a vertical direction with respect to the bottom plate.

9. A gas injection apparatus as claimed in claim 7 or 8, wherein the nozzle means is inclined at 5 to 60 ° to the vertical and extends to the base plate.

10. A gas injection apparatus according to any one of claims 7 to 9, wherein the cross-sectional area S of the lowermost portion of the fluid flow path and the nozzle memberCross sectional area S₁Ratio S/S₁Is 2 to 100.

11. The gas injection apparatus according to any one of claims 7 to 10, wherein an upper end of the fluid flow path extends to a position lower than an upper end of the nozzle to provide a spacing.

12. The gas injection device according to any one of claims 7 to 11, wherein the fluid flow path is formed to expand in diameter up to the nozzle member.