JP3409842B2 - Two-dimensional flow generator and distributor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention requires a powder fluid two-dimensional flow generator which can be used in a wide range of industrial materials such as electronic materials and organic materials, and a blast surface having higher precision and uniformity than ever before. The present invention also relates to a sandblasting device using the above two-dimensional flow generating device that can be used even in the field of sandblasting.

The present invention also relates to a powder fluid distributor which can be widely used in the field of industrial materials such as electronic materials and organic materials, the field of blast processing, the field of foods handling powdered grains and the like.

[0003]

2. Description of the Related Art In the field of blasting, it has become more demanding than ever to increase the grinding speed while maintaining the precision of the grinding surface. For that purpose, it is indispensable to spray the abrasive in a wide width and to keep the spray amount and density constant. As a means for spraying an abrasive in a wide width while keeping the spray density and the like constant, a method tried in Japanese Patent Laid-Open No. 10-58324 is known.

In the above method, compressed air is jet-jetted toward the nozzle in a closed space communicating with the abrasive-material inlet, and the abrasive is sucked by the negative pressure generated by the jetted air flow, A mixed air stream composed of this air and an abrasive is jetted from the nozzle, and then secondary jetted air is merged with the jetted mixed gas in a closed space to form a secondary mixed gas. This is to spray the abrasive into a diffusion space of a two-dimensionally wide cross-sectional area having a large cross-sectional area, rectify it into a wide two-dimensional flow, and then spray it onto the surface of the workpiece.

In the above method, in the middle of the flow path of the abrasive diffusion space, the abrasive diffusion space whose thickness direction is gradually narrowed, and the cross section connected to the abrasive diffusion space are rectangular and thin. In addition, a wide abrasive rectifying space is provided. That is, the above method is a means for obtaining a uniform two-dimensional flow, by forcibly compressing the flow of the abrasive in the abrasive rectifying space in the thickness direction to rectify the injection density of the abrasive into a uniform two-dimensional flow. Then, the method of spraying on the surface of the workpiece is adopted.

However, the method described in the above-mentioned Japanese Patent Laid-Open No. 10-58324 has a theoretically fatal difficulty as means for uniformly making the abrasive two-dimensional.

If there is only gas flow, it has the property that the sum of dynamic pressure and static pressure is always constant as known from Bernoulli's law, so that the decrease in velocity is immediately converted into pressure, and the pressure is changed. The velocity (flow density) across the entire cross section is made uniform. Therefore, if only gas flows, it is relatively easy to obtain a two-dimensional flow having a uniform density.

However, the flow of the abrasive is a powder fluid composed of powder and gas, and the powder is a discontinuous body composed of aggregates of solid fine particles. Therefore, the law of conservation of momentum is established for each fine particle, and each fine particle has the property of continuing its movement up to that point independently of other fine particles unless an external force is applied. Therefore, in the flow of the powder fluid composed of the abrasive and the gas, when the cross-sectional area of the flow rapidly expands in the abrasive diffusion space, the individual particles of the powder fluid flow only in the central portion of the pipe line, and the flow direction The flow across the cross section is extremely non-uniform.

In the method described in Japanese Patent Laid-Open No. 10-58324, the above problem is solved, and the density distribution in the cross section of the abrasive in the flow direction (hereinafter abbreviated as "density distribution") is uniform in two dimensions. As a means for obtaining the flow, an attempt is made to provide an abrasive rectifying space at the end of the abrasive diffusion space. That is, in the abrasive rectifying space, the flow of the abrasive is two-dimensionally forcibly compressed in the thickness direction and expanded in the width direction.

However, in order to make the density distribution of the powder fluid uniform by the above method, the abrasive must be flowed over a considerably long distance. Therefore, there is a limit to the length in which the rectifying portion can be provided due to the space limitation of the actual grinding device, and it is extremely difficult to obtain a two-dimensional flow of the abrasive with a uniform density distribution by the above method. . Furthermore,
In order to eject the abrasive from a plurality of nozzles, a grinding device equal in number to the number of nozzles is required. Therefore, if the above method is adopted, there is also a problem that a large amount of cost and space must be secured for the entire device. To do.

Further, conventionally, a trifurcated device as shown in FIG. 27 has been used as a device for distributing a powder fluid composed of an abrasive and air. In the distributor, the powder fluid flowing from the inlet 71 travels in the cylindrical pipe and is branched into two flow paths at the branch port 72. The branched powder fluid passes through the flow rate adjusting valve 73 and then flows into the injection nozzle of the sandblast device from the tip of the flow path.

However, in the above-mentioned conventional distributor, the density distribution in the flow direction transverse section of the powder fluid flowing from the inlet 71 (hereinafter abbreviated as "density distribution") is not uniform, so that the density at the branching port 72 is also high. The distribution is uneven,
As a result, there was a large difference in the distribution amount of the powder fluid distributed to each flow path. In order to correct such a difference in the distribution amount for each flow path, it is necessary to adjust the opening / closing amount of the flow rate adjusting valve 73 while collecting the powder injected from the nozzle at the tip of the flow path and measuring the weight. There wasn't. Therefore, the conventional distribution device has a problem that the flow rate adjustment is complicated and the distribution amount is liable to change and is not stable.

Further, in the field of sandblasting, when grinding a workpiece using a large number of jet nozzles, it has been practiced to use as many vibrators and screws as the distribution device for the number of nozzles. However, if such a method is adopted, it is necessary to adjust the vibration frequency for each vibrating body and the screw rotation speed for each screw, and thus the operation is very complicated. In addition, since a number of distribution devices equal to the number of nozzles are used, the sandblasting apparatus as a whole requires a great deal of cost and space.

The present invention provides a two-dimensional flow generating device that solves the above-mentioned principle problem that it is difficult to obtain a uniform two-dimensional flow of a powder fluid, and at the same time, a sandblasting device using the device. The purpose is to provide.

Another object of the present invention is to solve the problems of the conventional dispenser, and to provide a dispenser which is easy to handle, has excellent stability, and can be manufactured at low cost.

[0016]

A two-dimensional flow generator for powder fluid according to the present invention comprises a ceiling portion, a side surface portion and a bottom portion for generating an ascending swirling flow in a powder fluid consisting of powder and gas. Cylindrical device body and tangent line on the side surface of the device body
Direction of the powder fluid supply port and the side surface of the device body
It is characterized in that it comprises a vertically elongated powder fluid discharge port provided above the powder fluid supply port .

Another two-dimensional flow generator for powder fluid according to the present invention
Generates a swirling flow that rises to a powder fluid consisting of powder and gas.
A cylindrical device consisting of a ceiling part, side parts, and a bottom part
And the powder flow provided at the center of the bottom of the device body.
Body supply port and vertical powder flow provided on the side of the device body
It is composed of a body discharge port and a powder fluid supply port inside the device body.
The powder fluid introduced into the main unit of the device collides with it and
The feature is that there is a diffusion plate that diffuses along the side.
To collect.

The powder constituting the powder fluid is preferably a grinding material or a coating material which uniformly adheres to the processed surface of the workpiece.

The sandblasting apparatus of the present invention is the secondary
A cylindrical device having a ceiling portion, a side surface portion, and a bottom portion for generating a swirling flow that rises in an abrasive flow made up of an abrasive and a gas , in which the source flow generator is a two-dimensional flow supply device for the abrasive flow. body and consists of a grinding material flow supply port provided in the apparatus main body, the longitudinal length of the grinding material flow outlet provided et the on the side surface of the apparatus main body, formed in a shape tapered to the abrasive flow outlet tip It is characterized in that it is configured as an injection nozzle.

Another sandblasting apparatus according to the present invention is as described above.
Let the two-dimensional flow generator be the two-dimensional flow supply device for the abrasive flow.
And a cylindrical device body having a ceiling portion, a side surface portion and a bottom portion for generating an ascending swirl flow in an abrasive material flow composed of an abrasive material and a gas, and an abrasive material flow supply port provided in the apparatus body. If consists of a side surface portion provided et the longitudinal length of the grinding material flow outlet of the apparatus body, formed in a shape tapered to the abrasive flow outlet tip
Together configured as injection nozzles, characterized by comprising connecting the compressed air passage of the grinding material flow outlet and the blast gun.

Further, the powder fluid distributor of the present invention comprises a cylindrical device body having a ceiling portion, a side surface portion and a bottom portion for generating a rising swirl flow in the powder fluid consisting of powder and gas. a liquid powder supply port provided in the tangential direction of the side surface portion of the apparatus main body, the liquid powder supply opening of the side portion of the main body
It is characterized by comprising two or more powder fluid discharge ports provided at a position higher than the above .

Another powder fluid distribution device of the present invention is
Generate a swirling flow that rises in a powder fluid consisting of gas,
A cylindrical device main body composed of a ceiling portion, a side surface portion, and a bottom portion,
Liquid powder supply port provided at the center of the bottom of the apparatus main body
And two or more powder fluid discharges on the side of the device body
The main body of the device is a powder fluid supply port
A diffusing plate is installed to collide and diffuse the powder fluid introduced into the body.
It is characterized by being removed.

The powder constituting the powder fluid is preferably an abrasive or a powdery grain.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION A two-dimensional flow generator of the present invention will be described in detail below with reference to the drawings. 1 is a plan view showing an example of a basic embodiment of a two-dimensional flow generator of the present invention, FIG.
1 is a vertical sectional view taken along the line AA of FIG. 1, and FIG.
FIG. 1 is a plan sectional view taken along line B, where 1 is a two-dimensional flow generator, 2 is a cylindrical device body, 3 is a powder fluid supply port (hereinafter abbreviated as “supply port”), 4 Is a powder fluid discharge port (hereinafter, abbreviated as "discharge port"), 5 is a bottom portion of the apparatus body, 6 is a side surface portion of the apparatus body, and 31 is a ceiling portion of the apparatus body. The arrows in FIGS. 2 and 3 indicate the directions in which the powder fluid flows inside the two-dimensional flow generator 1.

The shape of the cross section of the apparatus body 2 needs to be circular. This is because a swirling flow having a smooth flow does not occur unless it is circular. The radius of the circle is generally uniform in the vertical direction of the apparatus main body 2, but can be gradually increased or decreased downward. The size of the radius is not particularly limited, and the height of the device body 2 is not particularly limited.

As long as the supply port 3 is cylindrical, the cross section may be circular or polygonal, but as shown in FIG. Guide channel 21
Is preferably provided to improve the swirling performance of a two-dimensional flow described later.

The discharge port 4 needs to be provided on the side surface portion 6 of the apparatus main body 2. By providing the discharge port 4 in this way, the two-dimensional flow generated inside the apparatus main body 2 can be taken out and discharged outside with a uniform density distribution. Outlet 4
From the viewpoint of making the entire apparatus compact, it is preferable to provide it above the side surface portion 6 of the apparatus main body, but as long as the two-dimensional flow generated inside the apparatus main body 2 can be taken out, the center of the side surface portion 6 can be obtained. It can also be provided at a position lower than the central portion and the central portion.

The cross-sectional shape of the discharge port 4 in the advancing direction of the powder fluid is not particularly limited, but is preferably vertically long, and vertically long rectangle is particularly preferable. By making the discharge port 4 vertically long, the two-dimensional flow generated inside the apparatus main body 2 can be discharged as a flatter two-dimensional flow to the outside of the device. Although the discharge port 4 is provided only at one place in this embodiment, it may be provided at two places or at three or more places.

The angle formed by the direction in which the powdery fluid flows into the discharge port 4 from the inside of the device body 2 and the clockwise tangent of the circular cross section of the device body 2 at the position where the discharge port 4 is attached to the device body 2. α is 0 ° ± 20 ° or 180 ° ± 20 °
Is preferable, 0 ° ± 10 ° or 180 ° ± 10 ° is more preferable, and 0 ° or 180 °, that is, the discharge port 4 is attached so that the flow path at the inlet part of the discharge port is oriented in the tangential direction of the circular cross section. Is particularly preferred. If the angle formed by the inflow direction and the clockwise tangent is outside the above range, there is a possibility that an efficient swirling flow of the powder fluid, which will be described later, does not occur. If the angle α of the discharge port 4 is configured as described above, the direction of the flow path at the outlet of the discharge port 4 may be the vertical direction or the oblique direction. When a plurality of discharge ports 4 are provided,
It is preferable that the angles formed by the inflow direction and the clockwise tangent line at each outlet 4 are equal, but the angle of each outlet 4 can be changed.

In this embodiment, the supply port 3 is connected to the apparatus main body 2
However, in the present invention, the supply port 3 may be provided in the side surface portion 6 or the bottom portion 5 of the apparatus main body.

FIG. 4 is a drawing showing an example of a basic embodiment of a two-dimensional flow generator in which the supply port 3 is provided on the side surface portion 6 of the main body of the apparatus, FIG. (B) is a front view. When the supply port 3 is provided on the side surface portion 6 of the apparatus body, the discharge port 4 must be provided above the supply port 3. With this configuration, the two-dimensional flow generated inside the apparatus body 2 can be taken out as a two-dimensional flow. Therefore, it is preferable to provide a sufficient space between the discharge port 4 and the supply port 3 to generate a two-dimensional flow. Similarly to the case where the supply port 3 is provided on the side surface portion 6, the shape of the cross section of the supply port 3 is not limited as long as it is cylindrical, as in the case where the supply port 3 is provided on the ceiling portion 31 of the apparatus body.

When the supply port 3 is provided on the side surface portion 6, there is no limitation on the direction in which the powder fluid flows from the supply port 3 into the inside of the apparatus main body 2, but it is preferable to make it the tangential direction of the circular cross section of the apparatus main body 2. . This is because when the powder fluid is made to flow in from the tangential direction, a two-dimensional flow is generated regardless of the angle α at which the discharge port 4 is attached. Therefore, when the powdered fluid is made to flow in from the tangential direction at the side surface portion, the discharge port 4 can be attached to the apparatus main body 2 at an angle α = 90 ° as shown in FIG.

FIG. 5 shows the supply port 3 at the center of the bottom portion 5 of the apparatus main body.
It is drawing which shows an example of the fundamental Example of a two-dimensional flow generator when it is provided in the part , Comprising: (a) is a bottom view, (b) is the same.
[Fig. 4] is a vertical cross-sectional view taken along line CC of Fig. 4A. Supply port 3
Similarly to the case of providing the central portion of the bottom portion 5 with the ceiling portion 31 of the apparatus main body, the supply port 3 having the tubular shape can be used.
There is no limitation on the shape of the cross section of.

When the supply port 3 is provided on the bottom 5, as shown in FIG.
It is preferable to provide the diffusion plate 32 shown in (a) and (b) so that the inflowing powder fluid can diffuse along the lower surface of the diffusion plate 32. The diffusing plate 32 may be planar, or may be raised conically from the outer peripheral portion toward the center with the angle of repose as a guide in order to smooth the flow of the powder fluid. The shape of the diffusion plate 32 is generally circular, but it may be triangular or quadrangular. As a means for fixing the diffusion plate 32, for example, there is a method of suspending it from the ceiling portion 31 using a support rod 33 as shown in FIG.

When the powdered fluid is introduced from the bottom portion 5 as described above, the angle α at which the discharge port 4 is attached to the apparatus main body 2 is the same as when the supply port 3 is attached to the ceiling portion 31.

The material of the two-dimensional flow generator 1 is not particularly limited, but it is preferable to use a general material having excellent wear resistance. In addition, it is not necessary to use the same material for the entire two-dimensional flow generator 1, and different materials may be used for each component.

The bottom portion 5 of the apparatus main body is a flat surface in the present embodiment, but the bottom portion 5 of the present invention is not limited to this, and in order to make the flow of the powder fluid smooth, it goes from the outer peripheral portion toward the center. The angle of repose can also be used as a guide to raise it in a conical shape.

The powder fluid of the present invention is composed of various powders and gases. The gas is usually air, but the gas is not limited to this, and a gas such as nitrogen can also be used.

The generation of a two-dimensional flow inside the apparatus body 2 will be described below. The above-mentioned powder fluid is supplied from the supply port 3 to the two-dimensional flow generator 1 in a state where the density distribution of the powder fluid is non-uniform.
Is supplied into the apparatus main body 2. The powdered fluid that has flowed in from the supply port 3 becomes a flow that descends in the central portion of the device main body 2,
It collides with the bottom portion 5 and the traveling direction is bent by 90 °. The 90
The flow of the bent powder fluid diffuses radially from the center of the bottom portion 5 along the bottom surface. The powder fluid diffused through the bottom 5 is
It collides with the innermost lower part of the side surface portion 6 of the device body 2 and is bent upward by 90 ° in the traveling direction. The powdery fluid, whose traveling direction is bent upward, becomes a thin two-dimensional flow along the inside 6 of the side surface, and rises while making a swirling motion.

At the point of time when the powdery fluid diffuses radially and hits the innermost bottom portion of the side surface portion 6, even if the density distribution of the powder fluid is non-uniform on the circumference, the two-dimensional flow generator 1 of the present invention is
The density distribution of the powder fluid can be made uniform in the process of the powder fluid moving up while making a swirling motion. By discharging the powder fluid having a uniform density distribution from the discharge port 4 having the two-dimensional cross section, a two-dimensional flow having a uniform density distribution can be discharged to the outside of the device. As described above, the revolutionary characteristic of the present invention lies in that the density distribution is made uniform by causing the powdery fluid to make a swirling motion.

As described above, the principle of generating a two-dimensional flow in an open space rather than a closed space is an application of the Teller-Blaudman theorem. According to Teller-Blaudman's theorem, the flow velocity of the steady rotating flow does not depend on the length in the rotating shaft direction, so that the change in velocity parallel to the rotating shaft is suppressed and the two-dimensional flow becomes parallel to the rotating shaft. The present invention applies this principle to generate a two-dimensional flow in an open space by making a rotating flow, that is, a swirling flow into a spiral flow.

In the present invention, the fluid powder can be supplied to the apparatus main body 2 from the supply port 3 by pressurizing, or the pressure of the discharge side of the discharge port 4 can be reduced.
It is also possible to supply the powdered fluid into the apparatus main body 2. Whichever method is used to supply the powdery fluid, a swirling two-dimensional flow can be generated inside the apparatus main body 2. Further, the two-dimensional flow generation device 1 of the present invention can be installed not only in the vertical direction but also in the horizontal direction, the vertical direction, or the diagonal direction, for example. A two-dimensional flow can be generated.

The two-dimensional flow generating device of the present invention can be used as a device for generating a two-dimensional flow having a uniform density distribution of a powder fluid composed of various powders and gas. It is particularly effective when the body is an abrasive for the purpose of grinding a workpiece. Examples of the abrasive include natural silica sand, alumina or silicon carbide powder, glass beads, fine steel balls, ceramic beads, and the like.

Further, the two-dimensional flow generating apparatus of the present invention is an apparatus for applying a coating material such as electrostatic flocking material or powder coating material as a powder, and applying the coating material uniformly to the processed surface of the workpiece. Can also be used.

FIG. 6 is a plan view showing an example of an embodiment in which the two-dimensional flow generating apparatus of the present invention is used as a sandblasting apparatus, 7 is a sandblasting apparatus, 8 is a powder fluid consisting of an abrasive and a gas ( Hereinafter, the sandblasting device 7 will be abbreviated as "grinding material flow" in the description, and the sandblasting devices 12, 17 will be described in the same manner.) The grinding material flow supply port (hereinafter abbreviated as "supplying port"). , 9 are abrasive material flow outlets (hereinafter,
It is abbreviated as “emission port”. ), 10 is a flow path (hereinafter abbreviated as "flow path") of the abrasive material flow of the discharge port 9, and 11 is a tapered portion (hereinafter referred to as a jet nozzle) at the tip of the discharge port 9. , "Tapered portion").

In the sandblasting device 7 of the present invention, an abrasive flow consisting of an abrasive and a gas (usually air) is supplied from the supply port 8 into the inside of the apparatus main body 2, and the abrasive flow is supplied to the apparatus main body 2. It hits the bottom of the side wall, diffuses the bottom radially and hits the bottom of the inside of the side part, and then the inside of the side part is swung along the inner wall as a two-dimensional thin abrasive flow. While rising, it is ejected from the discharge port 9 as a two-dimensional flow having a uniform density distribution. As described above, according to the sandblasting device 7 of the present invention, even if the density distribution of the abrasive flow flowing from the supply port 8 is non-uniform, the discharge port 9
A two-dimensional flow having a uniform density distribution can be obtained at the time of flowing into.

In this embodiment, the supply port 8 is provided in the ceiling portion, but the supply port 8 can be provided in the side surface portion or the bottom surface portion of the apparatus main body as in the two-dimensional flow generator 1. (The same applies to the sandblasting device 12 and the sandblasting device 17 described later).

Discharge port 9 of the sandblasting device 7 of the present invention
Is composed of a flow path 10 for an abrasive material flow and a tapered portion 11 at the tip. In the sandblasting device 7 of the present invention, by providing the tapered portion 11 at the tip, it is possible to obtain a flatter two-dimensional abrasive material flow having a sectional shape. Moreover, in the present invention, since the abrasive flow has already been made uniform as described above at the time of flowing into the discharge port 9, it is not necessary to consider making the density uniform by increasing the compression distance. Therefore, since the abrasive flow can be rapidly compressed, the tapered portion 11 can be made shorter than the injection nozzle of the conventional sandblasting device.

As mentioned above, the tapered portion 11 of the present invention.
Is provided mainly for the purpose of forming a more flat two-dimensional flow in the cross-sectional shape of the abrasive flow whose density distribution has already been made uniform. It is not intended to make the flow density distribution uniform. The tapered portion 11 is preferably narrowed in the thickness direction while keeping the dimension in the width direction constant, but the dimension in the width direction can be changed.

The cross-sectional shape of the flow path 10 in the moving direction of the abrasive flow is not particularly limited as long as it is a vertical type, but is usually rectangular. The size of the rectangle is not particularly limited, but the ratio of the long side to the short side is 3: 1 to 100: 1.
Is common. The length of the short side and the long side of the tapered portion 11 of the tip portion can be appropriately changed as necessary. The length of the flow channel 10 is generally the same as the diameter of the apparatus main body 2, and the length of the tapered portion 11 is usually the flow channel 1.
Although it is about ⅓ of the length of 0, the entire channel 10 can be tapered. The above dimensions are general dimensions, and the dimensions of the discharge port 9 in the sandblasting device 7 of the present invention are not limited to these.

Since the tapered portion 11 is heavily worn by the collision of the abrasive, it is preferable to use a different material only for this portion, for example, a wear resistant material such as ceramics or tungsten carbide.

In the sandblasting apparatus of the present invention, as shown in FIGS. 7 and 10, the two-dimensional flow generator 1 is used as a two-dimensional flow supply apparatus for the abrasive flow, and the discharge port for the abrasive flow and the blast gun are used. It can also be configured by connecting to the compressed air passage.

FIG. 7 is a plan view showing an example of an embodiment of the sandblasting device 12 of the present invention in which the two-dimensional flow generator 1 is used as a two-dimensional flow supply device, and 13 is an abrasive flow outlet of an abrasive flow. (Hereinafter, abbreviated as “emission port”)
Reference numeral 14 denotes a flow path of the abrasive flow (hereinafter, abbreviated as "flow path").
Reference numeral 15 denotes a tapered portion (hereinafter, simply referred to as “tapered portion”) formed as an injection nozzle at the tip of the discharge port 13, and 16 denotes a compressed air flow path of the blast gun.

The two-dimensional flow generator 1 of the sandblasting device 12 and the discharge port 13 including the flow path 14 and the tapered portion 15 can be constructed in the same manner as the sandblasting device 7. The blast gun used in the present invention may be of any type and structure as long as the abrasive can be sucked by ejecting compressed air to generate a negative pressure. The number of the discharge ports 13 in the sandblasting device 12 of the present invention is not limited, and may be one place or two or more places.

FIG. 8 is a cross sectional view of the flow path 14 taken along the line D--D of FIG. 7, and FIG. 9 is a cross sectional view of the compressed air passage 16 of the blast gun taken along the line E--E of FIG. . The cross section of the flow path 14 is similar to that of the two-dimensional flow generator 1 and the sandblast device 7 described above.
As in the case of being used as, it is required to have a vertically long shape, and is generally rectangular. In addition, the compressed air passage 16
The cross-sectional shape of is generally circular.

Since the sandblasting device 12 of the present invention is configured as described above, when compressed air is flown into the compressed air passage 16 of the blast gun toward the flow passage 14, a negative pressure is generated in the flow passage 14. Air is generated and the air in the flow path 14 is sucked. When the air in the flow path 14 is sucked, the flow path 14 is spatially continuous with the supply port 8 through the cylindrical apparatus main body, so that the abrasive is sucked together with the air from the supply port 8.
The flow of the sucked abrasive and air, that is, the abrasive flow, rises while swirling inside the side surface of the apparatus body 2 as described above. The sandblasting device 12 of the present invention can make a swirling flow having a uniform density distribution in the ascending process, even if the density distribution of the abrasive material flow flowing in from the supply port 8 is not uniform. The abrasive material flow having a uniform density distribution flows into the discharge port 13 while maintaining a uniform state, and the flow path 1
It joins with the compressed air flowing into 4 and is jetted from the tapered portion 15 to the surface of the workpiece as a flat two-dimensional flow having a uniform density distribution.

FIG. 10 is also a plan view showing an example of an embodiment of a sandblasting device in which the two-dimensional flow generating device of the present invention is used as an abrasive material flow supplying device. 17 is a sandblasting device and 19 is a sandblasting device 17. Abrasive flow discharge port, 16 compressed air passage 16 of blast gun, 18
In the drawing, the compressed air passage 16 of the blast gun has a tapered tip (hereinafter, abbreviated as "tapered portion"). The two-dimensional flow generator 1, which serves as an abrasive flow supply device of the sandblast device 17, the abrasive flow discharge port 19, and the tapered portion 18 of the compressed air passage 16 of the blast gun can be configured in the same manner as the sandblast device 12. The number of discharge ports 19 provided in the sandblasting device 17 of the present invention is not particularly limited.

The sandblasting device of the present invention is an example of the use of the two-dimensional flow generating device of the present invention, and the use of the two-dimensional flow generating device of the present invention is not limited to these.

[0059]

The present invention will be described in more detail with reference to the following examples. Example 1 A cylindrical device body having a radius of 101 mm and a height L = 200 mm, a cylindrical supply port having a radius of 43 mm provided on a ceiling portion of the device body, and a cross-sectional shape provided above the device body. Is a vertically long rectangle having a short side h = 10 mm and a long side H = 70 mm, and a two-dimensional flow generation device including a discharge port having a flow path length of 202 mm at one location was manufactured using a steel material S35C. 11A is a plan view of the two-dimensional flow generator used in Example 1, FIG. 11B is a front view, and FIG. 12 is a front view of a discharge port.

A flow rate of 0.
84 m ³ / min of air and injection amount 5 g / min of alumina # 100
An abrasive flow consisting of 0 and 0 was supplied to the supply port using a blower to form a two-dimensional flow inside the main body of the device, then sprayed from the discharge port, and the flow velocity distribution at a position 5 mm from the discharge port tip was measured using a Pitot tube. Measured. Alumina # 1000 was mixed with air by a suction method before the supply port.

Example 2 Using ceramic beads having an average particle size of 0.24 mm as a powder, a two-dimensional flow was generated by the same apparatus and conditions as in Example 1, and the tip of the discharge port was made under the same conditions as in Example 1. From 50m
The two-dimensional flow is jetted on the adhesive tape fixed at the position of m
The powder particles were jetted at 0 g / min for 1 second, and the distribution of powder particles was measured.

Example 3 An experiment was conducted in the same manner as in Example 1 except that the height of the cylindrical apparatus main body was L = 100 mm, and the flow velocity distribution was measured at a position 5 mm from the tip of the discharge port.

Example 4 Using ceramic beads having an average particle size of 0.24 mm as a powder, a two-dimensional flow was generated with the same apparatus and conditions as in Example 3, and the powder particles were obtained under the same conditions as in Example 2. Was measured.

Comparative Example 1 A fan-shaped nozzle having a short side h = 10 mm, a long side H = 70 mm, a length 140 mm, and a nozzle inlet diameter 28 mm at the tip of the nozzle (a side view in FIG. 14 (a), a plane in the same (b)). That is, a nozzle (hereinafter, abbreviated as "conventional nozzle") manufactured according to the description of Japanese Patent Application Laid-Open No. 10-58324 is used to inject an abrasive material flow under the same conditions as in Example 1. The flow velocity distribution was measured at a position 5 mm from the tip of the discharge port.

Comparative Example 2 Ceramic powder having an average particle size of 0.24 mm was used as the powder to produce the same abrasive material flow as in Example 2, and the same nozzle as in Comparative Example 1 was used to place it at a position 50 mm from the tip of the discharge port. Grinding material flow to fixed adhesive tape at a rate of 400 g / min.
Spraying for 2 seconds, the distribution of powder particles was measured.

FIG. 16 shows Example 1, Example 3 and Comparative Example 1.
5 shows the flow velocity distribution at a position 5 mm from the tip of the outlet measured in FIG. The horizontal axis Zh / H in FIG. 16 represents each standardized position in the long side direction of the discharge port, H is the length of the long side of the discharge port, and Zh is the center and the long side of the long side of the discharge port. The distance from each position in the vertical direction is shown. Vertical axis U / in FIG.
Um represents the flow velocity ratio at each position in the longitudinal direction with respect to the maximum flow velocity in the long side direction of the discharge port, Um is the maximum flow velocity measured in the long side direction of the discharge port, and U is the standardized Zh / H. Shows the flow velocity. Note that Um is about 36 m in each of Example 1, Example 3 and Comparative Example 1.
/ Sec.

From FIG. 16, when the conventional nozzle is used, the flow velocity near the center is the highest with respect to the flow velocity at each position in the long side direction of the discharge port, and the flow velocity becomes slower from the center toward the end, and the flow velocity ratio U / It can be seen that Um has a convex distribution as a whole. On the other hand, the height of the device body L = 100m
When a two-dimensional flow generator of m is used, the flow velocity distribution becomes more uniform than the conventional nozzle, and the height of the main body of the device is L = 200 m.
It can be seen that the velocity distribution is more uniform when a two-dimensional flow generator of m is used. Therefore, when the two-dimensional flow generator of the present invention is used, the flow velocity distribution itself of gas can be made uniform as compared with the conventional nozzle.

In FIGS. 17A, 17B and 17C, 5 from the tip of the discharge port measured in Example 2, Example 4 and Comparative Example 2.
The particle distribution of the ceramic beads at the position of 0 mm is shown. Note that FIG. 17 (a) shows the particle distribution when a two-dimensional flow generator with a device body height L = 200 mm is used, and FIG. 17 (b) uses a two-dimensional flow generator with a device body height L = 100 mm. The particle distribution in the case of the above is shown, and the same (c) shows the particle distribution in the case of using the conventional nozzle.

Horizontal axis Zh / H in FIGS. 17A, 17B and 17C
Represents the standardized positions in the long side direction of the discharge port, as in FIG. The vertical axis N / Nm represents the ratio of the number of ceramic bead particles at each normalized position in the long side direction to the maximum number of ceramic bead particles measured in the long side direction of the discharge port, and Nm is the long side direction of the discharge port. It represents the maximum number of ceramic bead particles measured, and N represents the number of particles in each normalized Zh / H. The number of ceramic bead particles is obtained by dividing the long side direction of the portion where the ceramic bead particles are attached to the adhesive tape into 1.8 mm intervals and measuring the number of particles attached to each of the divided ranges. Sought by. In the second embodiment, Nm =
85, Nm = 73 in Example 4, and Nm = 50 in Comparative Example 2.

From FIGS. 17 (a), 17 (b) and 17 (c), the particle distribution is the most uniform when the two-dimensional flow generator having the apparatus body height L = 200 mm is used, and the apparatus body height L = 100 mm.
It can be seen that when the two-dimensional flow generator of No. 2 is used, the uniformity of the particle distribution deteriorates in the order of using the conventional nozzle.

Example 5 A cylindrical device body having a diameter of 54 mm and a height of 50 mm, a cylindrical supply port having a diameter of 25 mm provided on the ceiling of the device body, and a cross-sectional shape of an inlet at a position above the device body are Short side h =
It is a vertically long rectangle having a length of 7.3 mm and a length of H = 25 mm, and the tip has a sectional shape of short side h = 2.5 mm and long side H = 2.
Channel length 55m formed in a 5 mm vertically long taper shape
A two-dimensional flow generator consisting of one discharge port of m was manufactured using steel material S35C. FIG. 13 (a) is a vertical sectional view of the two-dimensional flow generator, and FIG.
The cross-sectional view taken along the line -F is shown.

A blast gun was used in the above two-dimensional flow generator to supply compressed air with a pressure of 3 kg / cm ² .
Air volume of 0.68 from the discharge port together with 400 g / min of powdered alumina # 1000 (abrasive) added by suction method
Under the condition of m ³ / min, spraying was performed toward the glass plate fixed at a position of 50 mm from the tip of the discharge port, and grinding was performed.

Comparative Example 3 Short side h of nozzle tip h = 2.5 mm, long side H = 25 mm,
Length 54 mm, nozzle inlet diameter 8 mm (Fig. 15 (a)
A plan view and a side view are shown in FIG. Using the fan-shaped nozzle of 1), the abrasive flow was jetted toward the glass plate fixed at a position of 50 mm from the tip of the discharge port under the same conditions as in Example 5 to perform grinding.

The grinding trace of the glass plate ground in Example 5 was a rectangle having a long side of 25 mm and a short side of 3 mm as shown in FIG. 18 (a). On the other hand, the grinding trace of the glass plate that was ground in Comparative Example 3 was an ellipse with a major axis of 35 mm and a minor axis of 3.5 mm as shown in FIG.

From the comparison of the shapes of the above-mentioned grinding marks, it can be seen that the rectangular shape of the discharge port can be reproduced as it is by using the sandblasting apparatus of the present invention, whereas the conventional sandblasting apparatus cannot reproduce the rectangular shape of the nozzle outlet.

The surface roughness of each of the grinding marks of Example 5 and Comparative Example 3 was measured using a Surfcom 112B surface roughness profiler manufactured by Toyo Seimitsu Co., Ltd. As shown in FIG. 18A, the measurement position is from a center of the long side, a straight line A that passes through the center of the long side (long axis) and is parallel to the short side (minor axis) in both Example 5 and Comparative Example 3. Straight line B parallel to the short side (short axis) passing through a point 10 mm upward, 10 m downward from the center of the long side
There are four points, a straight line C that is parallel to the short side (short axis) through a point separated by m and a straight line D that is parallel to the long side (long axis) through the center of the short side.

FIGS. 19 and 21 (a) are drawings showing the measurement results of the cross-sectional shape of the grinding trace measured in Example 5, and FIG. 19 (a) shows the cross-sectional shape of the measurement point A (b). 21A shows the cross-sectional shape of the measurement point B, FIG. 21C shows the cross-sectional shape of the measurement point B, and FIG. 20 and 21B show Comparative Example 3
It is drawing showing the measurement result of the cross-sectional shape of the grinding trace measured in FIG. 20, (a) shows the cross-sectional shape of the measurement location A, (b) shows the cross-sectional shape of the measurement location B, (c) shows the measurement. 21B shows the cross-sectional shape of the point B, and FIG. 21B shows the cross-sectional shape of the measurement point D.

The horizontal axis y / Y1 in FIGS. 19 and 20 represents each standardized position in the long side (long axis) direction of the grinding trace,
Y1 represents the length of the long side (long axis) of the grinding trace, and y represents the distance between the center of the long side (long axis) of the grinding trace and each position in the vertical direction of the long side (long axis). Vertical axis D / Dm in FIGS. 19 and 20
Represents the ratio of the depth at each position of each measurement location to the maximum grinding depth at each measurement location, Dm is the maximum grinding depth at each measurement location, and D is each standardized y / Y1.
Represents the ratio of depth in. The horizontal axis of FIGS. 21 (a) and 21 (b),
The vertical axis is also the same as in FIGS. 19 and 20, except that the length of the short side (short axis) of the grinding trace is Y2.

The maximum depth Dm was 230 μm in A of Example 5, 210 μm in B, 200 μm in C, and 210 μm in D. On the other hand, the maximum depth Dm of Comparative Example 3 is 25 in A.
0 μm, 180 μm for B, 140 for C
It was 210 μm when μm and D were zero.

Comparing the measurement results of Example 5 and Comparative Example 3, the grinding depth of Example 5 is substantially constant and the cross-sectional shape of the grinding is a rectangular concave shape. It can be seen that the cross-sectional shape of No. 1 has a deep central portion and is concave as a whole, and cannot be ground to a constant depth.

From the above results, the sandblasting device using the two-dimensional flow generating device of the present invention can grind the work piece to a desired shape with a uniform depth, as compared with the sandblasting device using the conventional nozzle. I understand.

Next, the distribution device of the present invention will be described in detail with reference to the drawings. 22 is a plan view showing an example of a basic embodiment of the distribution apparatus of the present invention, FIG. 23 is a longitudinal sectional view taken along the line GG of FIG. 22, and FIG. 24 is taken along the line HH of FIG. 1 is a plan sectional view, in which 41 is a distribution device, 42 is a cylindrical device body, 43 is a powder fluid supply port (hereinafter abbreviated as “supply port”), and 44 is a powder fluid discharge port (hereinafter , "Outlet"
Is abbreviated. ), 45 indicates the ceiling of the apparatus main body, 46 indicates the side surface of the apparatus main body, and 47 indicates the bottom of the apparatus main body. 23 and 24, the powder fluid indicates the distribution device 4
The flow direction inside 1 is shown.

The shape of the cross section of the apparatus main body 42 needs to be circular. This is because a swirling flow having a smooth flow does not occur unless it is circular. The radius of the circle is generally uniform in the vertical direction of the apparatus main body 42, but can be gradually increased or decreased downward. The size of the radius is not particularly limited, and the device body 4
The height of 2 is also not particularly limited.

As long as the supply port 43 is cylindrical, the cross section may be circular or polygonal.
As shown in FIG. 22, it is preferable to provide a cylindrical guide channel 48 below the supply port 43 to improve the swirling performance of the two-dimensional flow. The two-dimensional flow in the present invention means a flow of fluid having a flat cross-sectional shape in the flow direction and a thin length in the thickness direction with respect to the length in the width direction. The generation and behavior of the two-dimensional flow will be described later.

The discharge port 44 is formed by the side surface portion 46 of the apparatus main body 42.
It is necessary to provide it. By providing the discharge port 44 in this way, the two-dimensional flow generated inside the apparatus main body 42 can be taken out and discharged to the outside while the density distribution of the powder fluid remains uniform. The powder, which is a constituent element, can be easily discharged in equal amounts for each discharge port 44. From the viewpoint of making the entire apparatus compact, the discharge port 44 is preferably provided above the side surface portion 46 of the apparatus main body, but if the two-dimensional flow generated inside the apparatus main body 42 can be taken out, the side surface portion is preferable. It can also be provided at the central portion of 46 or a position below the central portion.

The cross-sectional shape of the discharge port 44 in the advancing direction of the powder fluid is not particularly limited, but is usually a circular shape such as a circle or an ellipse, or a polygon such as a square or a rectangle. Outlet 4
The number of 4 needs to be 2 or more. Outlet 44
However, the object of the present invention of distribution cannot be achieved with only one location. It is usual that the shapes and sizes of the respective discharge ports 44 are made equal and the amounts of discharge from the respective discharge ports 44 are made equal, but the shapes and dimensions can be changed. In the present invention, by changing the cross-sectional area of each discharge port 44, the ratio of the amount of the powder fluid discharged from each discharge port 44 can be easily adjusted.

The powder fluid is discharged from the inside of the apparatus main body 42 to the discharge port 4
4 is 0 ° ± 20 ° or 180 °. The angle β formed by the direction of the flow into the device 4 and the clockwise tangent line of the circular cross section of the device body 42 at the position where the discharge port 44 is attached to the device body 42 is 0 ° ± 20 ° or 180 °.
° ± 20 ° is preferred, 0 ° ± 10 ° or 180 ° ± 1
0 ° is more preferable, and 0 ° or 180 °, that is, it is particularly preferable to mount the discharge port 44 so that the flow path at the inlet portion of the discharge port faces the tangential direction of the circular cross section. If the angle β formed by the inflow direction and the clockwise tangent line is outside the above range, there is a possibility that an efficient rising swirl flow of the powder fluid described later does not occur. If the angle β of the discharge port 44 is configured as described above, the direction of the outlet of the discharge port 44 may be the vertical direction or the oblique direction. Further, it is preferable that the angles formed by the inflow direction and the tangential line in the clockwise direction at each discharge port 44 are equal, but the angle of each discharge port 44 can be changed.

In the present embodiment, the supply port 43 is provided in the ceiling portion 5 of the apparatus main body 42, but in the present invention, the supply port 43 may be provided in the side surface portion 46 or the bottom portion 47 of the apparatus main body.

In FIG . 25, the supply port 43 is connected to the side surface 4 of the apparatus main body.
It is drawing which shows an example of the fundamental Example of the distribution apparatus when it is provided in FIG. 6, (a) is a top view, (b) is a front view. When the supply port 43 is provided on the side surface portion 46 of the apparatus body, the discharge port 44 needs to be provided above the supply port 43. With this configuration, the device main body 42
The two-dimensional flow generated inside the can be uniformly taken out from each discharge port 44 as a two-dimensional flow. Therefore, it is preferable to provide a sufficient space between the discharge port 44 and the supply port 43 to generate a two-dimensional flow. Similarly to the case where the supply port 43 is provided in the side surface portion 46, as in the case where the supply port 43 is provided in the ceiling portion 5 of the apparatus body, the shape of the cross section of the supply port 43 is not limited as long as it is cylindrical.

When the supply port 43 is provided in the side surface portion 46, there is no limitation on the direction in which the powder fluid flows from the supply port 43 into the inside of the apparatus main body 42, but it is preferable to make it the tangential direction of the circular cross section of the apparatus main body 42. . This is because when the powder fluid is made to flow in from the tangential direction, a two-dimensional flow is generated regardless of the angle β at which the discharge port 44 is attached. Therefore, when the powdery fluid is made to flow in from the tangential direction at the side surface portion, the discharge port 44 can be attached to the apparatus main body 42 with the angle β = 90 ° as shown in FIG.

In FIG. 26, the supply port 43 is connected to the bottom portion 47 of the apparatus main body.
2A is a view showing an example of a basic embodiment of the distribution device when it is provided in the central portion of FIG. 2A, where FIG. 1A is a bottom view and FIG. 1B is a vertical section taken along line I-I of FIG. It is a side view. Supply port 43
Also in the case of providing the central portion of the bottom portion 47 , the shape of the cross section of the supply port 43 is not limited as long as it is cylindrical as in the case of providing the ceiling portion 45 of the apparatus body.

When the supply port 43 is provided in the bottom portion 47, as shown in FIG.
The diffuser plate shown in 6 (a) and (b) is provided to remove the inflowing powdery fluid .
It is preferable to collide with the diffusion plate 49 so that the light can diffuse along the lower surface of the diffusion plate 49. Powdered bottom 47
In the above case, the angle β at which the discharge port 44 is attached to the apparatus main body 42 is the same as that when the supply port 43 is attached to the ceiling portion 45. As a means for fixing the diffusion plate 49, for example, there is a method of suspending it from the ceiling portion 45 using a support rod 50.

There are no particular restrictions on the material of the distributor 41, but it is preferable to use a material that is generally excellent in wear resistance. In addition, it is not necessary to use the same material for the entire distribution device 41, and different materials can be used for each component.

The bottom portion 47 of the apparatus main body is a flat surface in the present embodiment, but the bottom portion 47 of the present invention is not limited to this, and in order to make the flow of the powder fluid smooth, it goes from the outer peripheral portion toward the center. The angle of repose can also be used as a guide to raise it in a conical shape.

The powder fluid of the present invention is composed of various powders and gas. The gas is usually air, but the gas is not limited to this, and a gas such as nitrogen can also be used.

The generation of a two-dimensional flow inside the apparatus body 42 will be described below. The powder fluid is supplied from the supply port 43 into the apparatus body 42 of the distribution apparatus 41 in a state where the density distribution of the powder fluid is non-uniform. The powdery fluid flowing in from the supply port 43 becomes a flow descending in the central portion of the apparatus main body 42, hits the bottom portion 47, and the traveling direction is bent by 90 °.
The 90 ° -bent flow of the powder fluid diffuses radially from the center of the bottom portion 47 along the bottom surface. The powdery fluid that has diffused through the bottom portion 47 hits the innermost lower portion of the side surface portion 46 of the apparatus body 42, and the traveling direction is bent upward by 90 °. The powdery fluid, whose traveling direction is bent upward, becomes a thin two-dimensional flow along the inside 6 of the side surface, and rises while making a swirling motion.

At the point of time when the powdery fluid diffuses radially and hits the innermost bottom portion of the side surface portion 46, even if the density distribution of the powdery fluid is non-uniform on the circumference, the distribution apparatus 41 of the present invention swirls the powdery fluid. The density distribution of the powder fluid can be made uniform in the process of rising while moving. By discharging the powder fluid having the uniformed density distribution from the discharge ports 44, an equal amount of the powder fluid can be discharged from the discharge ports to the outside of the apparatus. By causing the powdered fluid to make a swirling motion in this way,
The epoch-making feature of the present invention is that an equal amount of powdered fluid can be easily taken out from each outlet.

As described above, the principle of generating a two-dimensional flow in an open space rather than a closed space is an application of the Teller-Blaudman theorem. According to Teller-Blaudman's theorem, the flow velocity of the steady rotating flow does not depend on the length in the rotating shaft direction, so that the change in velocity parallel to the rotating shaft is suppressed and the two-dimensional flow becomes parallel to the rotating shaft. The present invention applies this principle to generate a two-dimensional flow in an open space by making a rotating flow, that is, a swirling flow into a spiral flow.

The distribution device 41 of the present invention generates the two-dimensional flow inside the device main body 42 as described above, and the discharge port 4
4, it is possible to discharge the powder fluid having a uniform density. Therefore, the discharge amount of the powdery fluid discharged from each of the plurality of discharge ports 44 is a value obtained by dividing the area of the cross section of the discharge ports 44 in the flow direction by the total of the areas of the cross sections of the discharge ports 44 in the flow direction. Is a value that can be obtained by multiplying the discharge amount of powder fluid of the entire device. That is, if the flow-direction cross-sectional areas of the respective discharge ports 44 are made equal,
The powder fluid can be evenly distributed, and the amount of the powder fluid discharged to each discharge port 44 can be made proportional to the cross sectional area by changing the cross-sectional area in the flow direction of each discharge port 44.

In the present invention, the powder fluid can be supplied to the apparatus main body 42 from the supply port 43 by pressurizing, or the powder fluid can be supplied to the apparatus main body 42 by depressurizing the discharge port side of the discharge port 44. It can also be supplied in 42. Whichever method is used to supply the powder fluid, a swirling two-dimensional flow can be generated inside the apparatus main body 42. Further, the distribution device 41 of the present invention can be installed not only in the vertical direction but also in the horizontal direction, the vertical direction, or the oblique direction, and the swirling two-dimensional flow can be obtained by using any other installation method. Can be generated.

The distribution device of the present invention can be used as a device for distributing a powder fluid composed of various powders and a gas at a target ratio for each discharge port. It is particularly effective in the case of an abrasive for the purpose of grinding a work piece. Examples of the abrasive include natural silica sand, alumina or silicon carbide powder, glass beads, fine steel balls, ceramic beads, and the like.

The distribution device of the present invention can also be used as a device for distributing powdery or particulate cereals such as wheat, barley, meliken powder and rice as powder.

The distribution apparatus according to the present invention is not limited to the case where the powder constituting the powder fluid is an abrasive or a powdery grain, and the powder fluid composed of all kinds of powder and gas is used. Can be used for dispensing applications.

[0104]

The present invention will be described in more detail with reference to the following examples. Example 6 A cylindrical device body having a radius of 101 mm and a height L = 200 mm, a cylindrical supply port having a diameter of 25 mm provided on a ceiling portion of the device body, and provided above a side surface portion of the device body. A distributor having the shape shown in FIGS. 22 and 23, which is composed of three discharge ports each having a diameter of 15 mm and a flow path length of 50 mm, was manufactured using the steel material S35C.

A flow rate of 0.84 m ³ was applied to the supply port of the distributor.
/ Min air and emission amount 150g / min alumina # 1000
The powder fluid consisting of and was supplied to the supply port using a blower to form a two-dimensional flow inside the main body of the device, and then discharged from the discharge port.
A bag-like filter cloth was attached to each discharge port, alumina # 1000 discharged from each discharge port was collected, and the discharge amount per unit time was measured. Alumina # 1000 was mixed with air by a suction method before the supply port.

Example 7 A cylindrical device main body having a radius of 101 mm and a height L = 200 mm, a cylindrical supply port having a diameter of 25 mm below the side surface of the device main body, and provided above the side surface of the device main body. The distribution device having the shape shown in FIGS. 25 (a) and 25 (b), which is composed of three discharge ports each having a diameter of 15 mm and a flow path length of 50 mm,
It was manufactured using the steel material S35C, and the release amount per unit time was measured under the same conditions and methods as in Example 6.

Example 8 A cylindrical device body having a diameter of 101 mm and a height L = 200 mm, a cylindrical supply port having a diameter of 25 mm provided at the bottom of the device body, and a diameter of 192 mm provided inside the device body.
Of the shape shown in FIGS. 26 (a) and 26 (b), which is composed of the diffusion plate of FIG. 26 and three outlets having a diameter of 15 mm and a flow path length of 50 mm provided above the side surface of the apparatus body. Was manufactured using a steel material S35C, and the release amount per unit time was measured under the same conditions and methods as in Example 6.

Table 1 shows the average values of the results obtained by measuring 5 times for each of Examples 6 to 8.

[0109]

[Table 1]

From Table 1, it can be seen that in any of Examples 6 to 8, the particles are distributed to the outlets 1 to 3 substantially evenly.

[0111]

According to the two-dimensional flow generator of the present invention ,
The non-uniform powder fluid that has flowed in from the inlet rises as a two-dimensional flow that swirls on the wall surface inside the main body of the device, and the powder fluid is mixed uniformly by swirling and then becomes a uniform powder fluid from the powder fluid discharge port. Is released. The two-dimensional flow generation device can generate a two-dimensional flow of an abrasive or a coating material having a uniform density distribution by using an abrasive or a coating material as the powder fluid.

In the sandblasting device of the present invention,
By making the abrasive discharge port of the two-dimensional flow generator vertically long and configuring the tip of the abrasive discharge port as an injection nozzle formed in a tapered shape, a flat two-dimensional flow in which the abrasive is uniformly mixed can be obtained. It can be sprayed on the surface of the work piece. In the sandblasting device of the present invention, the abrasive discharge port of the two-dimensional flow generator, the abrasive discharge port and the compressed air passage of the blast gun are connected, and the tip of the compressed air passage is formed into a tapered injection. Also by configuring as a nozzle, it is possible to inject a flat two-dimensional flow in which the abrasive is uniformly mixed onto the surface of the workpiece.

Further , according to the distribution apparatus of the present invention, the non-uniform powder fluid flowing from the supply port rises while swirling as a two-dimensional flow swirling on the wall surface inside the apparatus main body, whereby the powder fluid Are uniformly mixed and then discharged as a uniform powder fluid from the discharge port. Therefore, the powdery fluid can be evenly discharged and distributed to each discharge port. Moreover, the distribution device of the present invention not only distributes the powdered fluid evenly, but also sets the cross-sectional area of each of the two or more discharge ports appropriately so that the powdered fluid can be easily and stably stabilized at a desired ratio. Can also be distributed.

Further, since the distributor of the present invention has a simple structure, it can be manufactured at an extremely low cost.

The dispenser of the present invention can be used as a dispenser of a sandblasting device by using an abrasive as powder, and as a dispenser for food by using powdery grain as powder. Can be used.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a basic embodiment of a two-dimensional flow generator of the present invention.

FIG. 2 is a vertical cross-sectional view taken along the line AA of FIG.

FIG. 3 is a plan sectional view taken along the line BB in FIG.

FIG. 4 (a) is a side view of the supply port 3 of the apparatus main body 6
It is a top view showing an example in the case of being provided in. Figure 4 (b)
FIG. 4 is a plan view showing an example of a case where the supply port 3 is provided on the side surface portion 6 of the apparatus body.

FIG. 5A is a bottom view showing an example of the case where the supply port 3 is provided in the bottom portion 5 of the apparatus main body. FIG. 5 (b) shows
It is a longitudinal cross-sectional view which follows CC line of the same (a).

FIG. 6 is a plan cross-sectional view of a sandblasting device in which an abrasive material flow outlet is formed as a tapered injection nozzle.

FIG. 7 is a plan cross-sectional view of a sandblasting device configured by connecting a compressed air passage of a blast gun to an abrasive material flow outlet.

8 is a vertical cross-sectional view taken along the line DD of FIG.

9 is a vertical cross-sectional view taken along the line EE of FIG.

FIG. 10 is a plan cross-sectional view of a sandblasting device configured by connecting an abrasive material discharge port of a two-dimensional flow generating device to a compressed air passage of a blast gun.

FIG. 11A is a plan view of the two-dimensional flow generator used in the first embodiment. FIG. 11B is a front view of the two-dimensional flow generator used in the first embodiment.

FIG. 12 is a front view of a discharge port of the two-dimensional flow generator used in the first embodiment.

FIG. 13 (a) is a vertical cross-sectional view of a two-dimensional flow generator used in Example 5. FIG. 13B is the same as FIG.
It is a transverse cross-sectional view taken along the line FF of FIG.

FIG. 14 (a) is a side view of a conventional nozzle used in Comparative Example 1. FIG. 14B is a plan view of the conventional nozzle used in Comparative Example 1.

15 (a) is a side view of a conventional nozzle used in Comparative Example 3. FIG. FIG. 15B is a plan view of the conventional nozzle used in Comparative Example 3.

16 is a drawing showing flow velocity distributions in Example 1, Example 3, and Comparative Example 1. FIG.

FIG. 17 (a) is a device body height L = 200 m.
It is a particle distribution at the time of using the 2-dimensional flow generator of m. FIG. 17B shows a particle distribution when a two-dimensional flow generator having a height L of the apparatus main body of 100 mm is used. Figure 1
7 (c) is a particle distribution when a conventional nozzle is used.

18 (a) is a plan view of a grinding trace in Example 5. FIG. FIG. 18B is a plan view of grinding marks in Comparative Example 3.

FIG. 19 (a) is a measurement point A in Example 5.
It is a cross-sectional shape of the grinding trace of. FIG. 19B is a cross-sectional shape of the grinding trace at the measurement location B in the fifth embodiment. FIG. 19
(C) is the cross-sectional shape of the grinding trace at the measurement location C in Example 5.

20 (a) is a measurement point A in Comparative Example 3. FIG.
It is a cross-sectional shape of the grinding trace of. FIG. 20 (b) is a cross-sectional shape of the grinding trace at the measurement point B in Comparative Example 3. Figure 20
(C) is the cross-sectional shape of the grinding trace at the measurement location C in Comparative Example 3.

FIG. 21 (a) is a measurement point D in Example 5.
It is a cross-sectional shape of the grinding trace of. FIG. 21B is a cross-sectional shape of the grinding trace at the measurement point D in Comparative Example 3.

FIG. 22 is a plan view showing an example of a basic embodiment of the distributor of the present invention.

23 is a vertical cross-sectional view taken along the line GG of FIG.

24 is a plan sectional view taken along line HH of FIG. 23.

FIG. 25 (a) is a plan view showing an example in which the supply port 43 is provided in the side surface portion 46 of the apparatus main body. Figure 2
5B is a plan view showing an example of the case where the supply port 43 is provided in the side surface portion 46 of the apparatus main body.

FIG. 26A is a bottom view showing an example of the case where the supply port 43 is provided in the bottom portion 45 of the apparatus main body. FIG. 26
(B) is a longitudinal cross-sectional view taken along line I-I of (a).

FIG. 27 is a drawing of a conventional trifurcated dispensing device.

[Explanation of symbols]

1 Two-dimensional flow generator 2 Bottomed cylindrical device body 3 Granule supply port 4 Powder fluid outlet 5 Bottom of device body 6 Side of device 31 Ceiling of device body 7 Sandblasting equipment 8 Grinding material supply port 9 Abrasive flow outlet 11 Tapered portion 12 Sandblasting equipment 13 Abrasive flow outlet 15 Tapered portion 16 Blast gun compressed air flow path 17 Sandblasting equipment 18 Tapered portion 19 Abrasive flow outlet 41 Distributor 42 Device body 43 Powder fluid supply port 44 Powder fluid discharge port 45 Ceiling of device body 46 Side of device body 47 Bottom of device

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B24C 5/02

Claims (8)

(57) [Claims] 1. A cylindrical device main body having a ceiling portion, a side surface portion and a bottom portion for generating an ascending swirling flow in a powder fluid consisting of powder and gas, and a tangent line at the side surface portion of the device main body.
Direction of the powder fluid supply port and the side surface of the device body
A powder fluid two-dimensional flow generation device comprising a vertically elongated powder fluid discharge port provided above the powder fluid supply port . 2. Ascending to a powder fluid consisting of powder and gas
Consists of a ceiling part, side parts, and bottom part that generate swirling flow
A cylindrical device body, a powder fluid supply port provided at the center of the bottom of the device body, and a side surface part of the device body
It consists of a vertically elongated powder fluid discharge port,
The powder fluid introduced from the supply port into the device body collides and spreads.
Powder fluid characterized by being provided with a diffuser plate
Two-dimensional flow generator. 3. A two-dimensional flow generating device according to any one of claims 21 to, characterized in that the powder constituting the liquid powders are abrasive. 4. The two-dimensional structure according to any one of claims 1 and 2.
A cylindrical device body including a ceiling portion, a side surface portion, and a bottom portion, in which the flow generating device is a two-dimensional flow supplying device for an abrasive material flow, and a rising swirl flow is generated in an abrasive material flow composed of an abrasive material and a gas. When the abrasive flow supply port provided in the apparatus body consists of a side surface portion provided et the longitudinal length of the grinding material flow outlet of the apparatus body is formed in a shape tapered to the abrasive flow outlet tip A sandblasting device characterized by being configured as a spray nozzle. 5. The two-dimensional according to any one of claims 1 and 2.
A cylindrical device body including a ceiling portion, a side surface portion, and a bottom portion, in which the flow generating device is a two-dimensional flow supplying device for an abrasive material flow, and a rising swirl flow is generated in an abrasive material flow composed of an abrasive material and a gas. When the abrasive flow supply port provided in the apparatus body consists of a side surface portion provided et the longitudinal length of the grinding material flow outlet of the apparatus body is formed in a shape tapered to the abrasive flow outlet tip A jet
A sandblasting device, characterized in that it is configured as an injection nozzle, and that an abrasive material flow outlet is connected to a compressed air passage of a blast gun. 6. A cylindrical device main body composed of a ceiling portion, a side surface portion and a bottom portion for generating an ascending swirling flow in a powder fluid composed of a powder and a gas, and a tangent to the side surface portion of the apparatus main body.
Direction of the powder fluid supply port and the side surface of the device body
A powdery fluid distribution device comprising two or more powdery fluid discharge ports provided above the powdery fluid supply port . 7. Ascending to powder fluid consisting of powder and gas
Consists of a ceiling part, side parts, and bottom part that generate swirling flow
A cylindrical device main body, a powder fluid supply port provided at the center of the bottom of the device main body, and two
It consists of the above powder fluid discharge port, and the powder fluid is
The powder fluid introduced from the supply port into the device body collides and spreads.
A powder fluid distribution device , characterized in that it is provided with a diffusing plate . 8. A powder grinding material constituting the liquid powder, or Konaryu according to any one of claims 6-7 which is powdery grains
Body distributor.