JP6970397B1 - Granule supply device and granular material supply method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a granular material supply device and a granular material supply method capable of suppressing damage to a sieve net and effectively carrying out granulation. SOLUTION: This is a granule supply device 10 for supplying a granular substance to a sieve device 5 for separating the granular substance by a sieve net 7, and the sieve device is passed through a discharge supply opening 11b provided at one end in the axial direction. A supply unit 11 having a cylindrical space 11h communicated with a hollow space 6h inside the 5, a fluid supply unit 15 that supplies a granular material together with a fluid to the space 11h of the supply unit 11, and a fluid supply unit 15. The supply unit 11 is provided with a pipe 12 that communicates with the supply unit 11, and the supply unit 11 is connected to the sieving device 5 so that the discharge supply opening 11b is above the sieving net 7 of the sieving device 5 and faces the sieving net 7. One end of the pipe 12 is connected to the supply opening 11b provided on the side surface of the supply unit 11, and the extension line a of the central axis of the pipe 12 at the connection position with the supply opening 11b is the supply unit 11. It is arranged so as not to pass through the central axis CL of the space 11h. [Selection diagram] Fig. 1

Description

The present invention relates to a granular material supply device and a granular material supply method. More specifically, the present invention relates to a granular material supply device and a granular material supply method for supplying granular materials to a vibrating sieve device that separates granular materials having different particle sizes.

Machine parts such as oil-impregnated bearings are manufactured by impregnating a sintered metal obtained by sintering powder with lubricating oil. As a method for producing a metal powder used for such a sintered metal, a method for producing a metal powder using an atomizing device is used. For example, in the production of a metal powder using a water atomizing device, a metal material is melted and supplied to the water atomizing device. In the water atomizing device, high-pressure water is jetted and collided with a liquid consisting only of a metal in which a metal material is melted. Then, fine metal powder (atomize powder) is produced, and the produced metal powder is collected in a collection pot together with water.

Since the metal powders produced by the water atomizing device do not have the same particle size, granules having a small particle size (about several μm) and granules having a large particle size (about several mm) are mixed. When such metal powder is used for machine parts such as oil-impregnated bearings, it is necessary to supply metal powder having a certain particle size in order to improve the formability and workability of the machine parts. Therefore, the metal powder collected in the collection pot together with water is supplied to a vibrating sieve or the like and is separated according to the particle size.

As the vibrating sieve device used for sizing, for example, those described in Patent Documents 1, 2 and the like are used. This vibrating sieve device includes a sieve main body and a sieve net installed inside the sieve main body. The sieve main body is provided with a raw material supply port at the upper part of the sieve net, and granules are separated at the lower part of the sieve net. A material discharge port is provided. Further, a vibration applying means for vibrating the sieve main body is provided, and by operating the vibration applying means, the sieve net can be vibrated together with the sieve main body.

If the metal powder collected in the recovery pot is supplied to this vibrating sieve device from the raw material supply port, the metal powder having a particle size that passes through the sieve net is discharged from the sizing material discharge port and has a particle size that cannot pass through the sieve net. The metal powder is left on the sieve mesh. Therefore, the metal powder having a uniform particle size produced by the water atomizing device can be separated by the vibrating sieve device.

Jikkai Sho 52-137371 Japanese Patent No. 2731515

The metal powder supplied from the raw material supply port of the vibrating sieve device falls on the sieving net, but usually, the raw material supply port is arranged so that the metal powder falls near the center of the sieving net. Then, the metal powder accumulates near the center of the sieve net, and the efficiency of granulation deteriorates.

Further, since the metal powder falls near the center of the sieve net, the vicinity of the center of the sieve net is easily damaged by the impact or wear caused by the fall of the metal powder. On the other hand, the peripheral part of the sieve net is not so damaged because the metal powder only moves from the vicinity of the center due to the vibration. Then, even if the peripheral portion can be used, the sieve net must be replaced due to damage near the center, so that the entire sieve net cannot be effectively utilized.

In view of the above circumstances, it is an object of the present invention to provide a granular material supply device and a granular material supply method capable of suppressing damage to the sieve net and effectively carrying out granulation.

<Granular material supply device>
The granular fluid supply device of the first invention is a granular fluid supply device that supplies granular fluid to a sieve device that separates the granular fluid by a sieving net, and is described above through a discharge opening provided at one end in the axial direction. A supply unit having a cylindrical space communicated with a hollow space inside the sieving device, a fluid supply unit that supplies a granular material together with a fluid to the space of the supply unit, and the fluid supply unit and the supply unit. The supply unit is connected to the sieving device so that the discharge opening is above the sieving net of the sieving device and faces the sieving net. One end thereof is connected to a supply opening provided on the side surface of the supply portion so that the extension line of the central axis of the pipe at the connection position with the supply opening does not pass through the central axis of the space of the supply unit. The fluid supply unit is characterized in that it supplies a fluid having a flow velocity forming a swirling flow flowing along the inner surface of the supply unit.
In the first invention, the fluid supply unit of the second invention includes a container for accommodating the granules, and the pipe connects the supply unit and the container of the fluid supply unit. The fluid supply unit is characterized in that the fluid is supplied to the container and the granules are supplied together with the fluid from the container.
In the first or second invention, the granular material supply device of the third invention is the one in which the granular body is formed by the water atomizing device, and the container of the fluid supply unit is arranged below the water atomizing device. It is characterized in that it is arranged so as to recover the granules formed by the water atomizing device.
In the first, second or third invention, the fluid supply unit of the fourth invention includes a container for accommodating the granules, and the piping includes the supply unit and the fluid supply unit. It is characterized in that it is connected to the container of the above and is arranged so as to have a portion extending upward from the connection position of the fluid supply unit with the container.
<Grade supply method>
The granular material supply method of the fifth invention is a granular material supply method for supplying granular material to a sieving device that separates the granular material by a sieving net, and the sieving device is provided at one end in the axial direction. A supply unit having a cylindrical space communicated with the hollow space inside the sieving device is connected through the discharge opening, and the discharge opening is above the sieving net of the sieving device. It is connected to the sieving device so as to face the sieving net, does not pass through the central axis of the space of the supply section from the supply opening provided on the side surface of the supply section, and is along the inner surface of the supply section. It is characterized in that the granules are supplied to the space in the supply unit together with the fluid having a flow velocity forming a swirling flow.
In the fifth aspect of the invention, the granular material supply method of the sixth invention is such that the granular material is formed by a water atomizing device, and the granular material is collected together with a fluid from a container for collecting the granular material formed by the water atomizing device. It is characterized by supplying to the space in the supply unit.
In the sixth aspect of the invention, the granular material supply method of the seventh invention is to supply the granular material from the container together with the fluid to the space in the supply unit while continuing the formation of the granular material by the water atomizing device. It is a feature.

<Granular material supply device>
According to the first invention, when the granular material is supplied to the supply unit together with the fluid through the pipe by the fluid supply unit, the fluid forms a swirling flow along the inner surface of the supply unit and flows into the sieving device. .. Since the centrifugal force applied to the granules differs depending on the size and weight of the granules and the position with respect to the flow field, the granules can be supplied to a wide area of the sieve mesh. Then, since it is possible to prevent only the damage of a specific part of the sieve net from progressing, the life of the sieve net can be extended. In addition, the efficiency of separating the granules can be improved as compared with the case where the granules are solidified to some extent and supplied onto the sieve net.
According to the second invention, if the desired granular material is stored in the container, the granular material can be supplied to the supply unit together with the fluid supplied from the fluid supply unit.
According to the third invention, the granules formed by the water atomizing device can be easily separated.
According to the fourth invention, it is possible to prevent air from being mixed when the granular material is supplied to the supply unit as a slurry mixed with a liquid.
<Grade supply method>
According to the fifth invention, when the granules are supplied to the supply unit together with the fluid, the fluid forms a swirling flow along the inner surface of the supply unit and flows into the sieving device. Since the centrifugal force applied to the granules differs depending on the size and weight of the granules and the position with respect to the flow field, the granules can be supplied to a wide area of the sieve mesh. Then, it is possible to prevent the damage of only a specific part of the sieve net from progressing, so that the life of the sieve net can be extended. In addition, the efficiency of separating the granules can be improved as compared with the case where the granules are solidified to some extent and supplied onto the sieve net.
According to the sixth and seventh inventions, the granules formed by the water atomizing device can be easily separated.

It is a schematic explanatory drawing of the equipment 1 which adopted the granular material supply device 10 of this embodiment. It is a schematic explanatory view of the vibrating sieve device 5, (A) is a cross-sectional view, (B) is a view taken along the line BB of (A), and (C) is the line BB of (A). It is an arrow view.

The granular material supply device of the present embodiment is a device that supplies the granular material to the sieving net of the sieving device so as to improve the sizing efficiency of the granular material and suppress the damage of the sieving net. It has a feature in what it did.

The granules supplied to the sieving device by the granule supply device of the present embodiment are not particularly limited. For example, metal powders such as alloys such as copper and tin produced by the atomizing method, powders made of materials such as ceramics and resins, and the like can be mentioned.
Further, the particle size of the granular material is not particularly limited. For example, those having a particle size of about several tens of μm to several hundreds of μm can be mentioned.

Further, the equipment to which the granular material supply device of the present embodiment is adopted is not particularly limited. For example, in equipment such as a hopper or the like in which granules such as metal powder are stored, the granules can be used as a device for supplying the granules to a sieving device for separating the granules.

Further, in the granular material supply device of the present embodiment, when the granular material such as metal powder is supplied to the sieve device as a slurry mixed with a liquid such as water (wet treatment), the granular material such as metal powder is sieved together with gas. It can be used either when it is supplied to the device (dry treatment) or when it is supplied.

Hereinafter, a case where the metal powder produced by the water atomizing method is supplied to the sieving apparatus as a slurry mixed with water will be described as a representative.

<Equipment 1 provided with the granular material supply device 10>
In FIG. 1, reference numeral 2 indicates a water atomizing device in equipment 1. The water atomizing device 2 produces fine metal powder by injecting and colliding high-pressure water with the molten metal. The metal powder m generated by the water atomizing device 2 is dropped into a container 2a installed below the water atomizing device 2 and collected.
The container 2a corresponds to the container of the fluid supply unit 15 in the claims.

The container 2a of the water atomizing device 2 is communicated with the granular material supply port 6a formed in the main body 6 of the vibrating sieve device 5 via the pipe 12 of the granular material supply device 10 and the supply unit 11 (FIG. 2 (FIG. 2). A) See). The fluid supply device 16 of the fluid supply unit 15 of the granular material supply device 10 for supplying water into the container 2a is communicated with the container 2a via a pipe 15p.

As shown in FIG. 2, the vibrating sieve device 5 includes a main body portion 6 having a hollow space 6h. The hollow space 6h of the main body 6 is communicated with the supply portion 11 of the granular material supply device 10 through the granular material supply port 6a. The main body 6 is provided with a sieve net 7 so as to vertically divide the hollow space 6h. The granular material supply port 6a is provided so as to be located above the central portion of the sieve net 7. Further, on the side surface of the main body 6 above the sieve net 7, a first discharge port 6c for discharging the metal powder m on the sieve net 7 to the outside is provided. On the other hand, at the lower end of the main body 6, that is, the portion of the main body 6 below the sieve net 7, a second discharge port 6b for discharging the metal powder m and water that have passed through the sieve net 7 to the outside is provided. It is provided. Although not shown, the vibrating sieve device 5 includes a vibration generating portion that applies vibration to the main body portion 6.

Since the equipment 1 has the above-mentioned configuration, the metal powder m formed by the water atomizing device 2 can be separated and recovered from the molten metal by performing the following.

First, if the molten metal is supplied to the water atomizing device 2 to form the metal powder m, the metal powder m and the water W are accumulated in the container 2a. Then, when a certain amount or more of the metal powder m is accumulated in the container 2a, the operation of the water atomizing device 2 is stopped. Then, the water W accumulated in the container 2a is drained so that only the metal powder m is stored in the container 2a.

After that, when water is supplied to the container 2a from the fluid supply unit 15 of the granular material supply device 10 through the pipe 15p, the metal powder m in the container 2a is in the state of the slurry S mixed with water, and the granular material supply device 10 is used. It passes through the pipe 12 and the supply unit 11 and is supplied into the hollow space 6h of the main body 6 of the vibrating sieve device 5. As the water to be supplied at this time, the water W (supernatant water) accumulated in the container 2a may be used, or industrial water may be used.

Then, since the slurry S falls on the sieving net 7, among the metal powders m contained in the slurry S, the metal powder m larger than the mesh size of the sieving net 7 remains on the sieving net 7, and the mesh of the sieving net 7 is used. The metal powder m smaller than the opening passes through the sieve mesh 7 together with water and is discharged to the outside from the second discharge port 6b.

On the other hand, since the metal powder m is not completely spherical, the metal powder m having a major axis larger than that of the mesh 7 remains on the mesh 7 even if the minor axis is smaller than the opening of the mesh 7. Further, even when a plurality of metal powders m smaller than the mesh size of the sieve mesh 7 are attached to each other by water to form a mass larger than the mesh size of the sieve mesh 7, the metal powder m (that is, a mass) is sieved. It remains on the net 7.

However, if the vibration generating portion applies vibration to the main body portion 6 of the vibrating sieve device 5, the posture of the metal powder m can be changed. Therefore, the sieve net 7 having a minor axis smaller than the mesh size of the sieve net 7 is used. Can be passed through. Further, since the plurality of metal powders m attached to each other by water can be separated, the metal powder m smaller than the mesh size of the sieve net 7 among the metal powder m forming the lump can be passed through the sieve net 7. ..

Further, if the vibration generating portion applies vibration to the main body portion 6 of the vibration sieving device 5, the metal powder m on the sieving net 7 can be moved along the sieving net 7, so that the metal powder on the sieving net 7 can be moved. m can be discharged to the outside from the first discharge port 6c.

In the above example, the water W accumulated in the container 2a is drained, and then the water is supplied to the container 2a by the fluid supply unit 15 of the granular material supply device 10, but the water W is accumulated in the container 2a. Water may be supplied to the container 2a by the fluid supply unit 15 of the granular material supply device 10 in this state. In this case, water may be supplied to the container 2a by the fluid supply unit 15 without draining the water W from the container 2a, or a certain amount of the water W may be drained from the container 2a and then the fluid supply unit 15. Water may be supplied to the container 2a.

Further, in the above example, a case where water is supplied to the container 2a by the fluid supply unit 15 of the granular material supply device 10 after the operation of the water atomizing device 2 is stopped has been described (batch processing). Water may be supplied to the container 2a by the fluid supply unit 15 of the granular material supply device 10 while the water atomizing device 2 is operating. In this case, the production of the metal powder m and the sizing can be continuously carried out (continuous treatment).

<Granular material supply device 10>
Hereinafter, the granular material supply device 10 will be described in detail.
As shown in FIG. 1, the granular material supply device 10 includes a supply unit 11, a pipe 12, and a fluid supply unit 15.

<Supply unit 11>
As shown in FIG. 2, the supply unit 11 is a member having a cylindrical space 11h inside with the lower end open and the upper end closed. The discharge opening 11a at the lower end of the supply unit 11 is attached to the granular material supply port 6a of the main body portion 6 of the vibrating sieve device 5. That is, the discharge opening 11a of the supply unit 11 is attached to the granular material supply port 6a so as to close the granular material supply port 6a of the main body 6 of the vibrating sieve device 5. A supply opening 11b to which the pipe 12 is connected is formed on the side surface of the supply unit 11. The supply opening 11b is provided at a position where the central axis s is biased in the radial direction with respect to the central axis CL of the supply unit 11 (see FIG. 2B).

<Piping 12>
As shown in FIG. 1, the pipe 12 is provided so as to connect the container 2a of the water atomizing device 2 and the supply unit 11. Specifically, the pipe 12 is installed so as to connect the opening provided on the side surface of the container 2a and the supply opening 11b provided on the side surface of the supply unit 11. That is, the inside of the container 2a and the inside of the supply unit 11 are communicated with each other by the pipe 12. Moreover, in the pipe 12, at the position of the supply opening 11b of the supply unit 11, the extension line of the central axis (line a in FIG. 2B) of the supply unit 11 does not pass through the central axis CL of the supply unit 11. It is connected to the supply opening 11b. Therefore, when the slurry S is supplied into the supply unit 11 through the pipe 12, the slurry S flows along the inner surface of the supply unit 11 (FIG. 2B). That is, the slurry S supplied through the pipe 12 flows spirally in the supply unit 11 and is supplied into the main body portion 6 of the vibrating sieve device 5 (FIG. 2A). ..

<Fluid supply unit 15>
The fluid supply unit 15 includes a container 2a, a fluid supply device 16 capable of flowing water into the pipe 15p at a certain flow velocity, and a pipe 15p communicating the fluid supply device 16 and the container 2a. .. The fluid supply unit 15 sends the slurry S, which is a mixture of the metal powder m and water, from the container 2a to the supply unit 11. The fluid supply device 16 of the fluid supply unit 15 can send the slurry S, which is a mixture of the metal powder m and water, from the container 2a to the supply unit 11, and the slurry S is sent to the supply unit 11 with a certain flow velocity. It is not particularly limited as long as it can supply. For example, a general pump or the like can be used. The "certain flow velocity" here means a flow velocity in the supply unit 11 to which the slurry S can form a swirling flow along the inner surface of the supply unit 11.

With the above configuration, if water is supplied from the fluid supply unit 15 into the container 2a through the pipe 15p, the slurry S in which the metal powder m and water are mixed flows into the supply unit 11 through the pipe 12. ..

The slurry S flowing into the space 11h of the supply unit 11 has a certain flow velocity, and at the position of the supply opening 11b of the supply unit 11, the central axis s of the supply opening 11b and the axial extension line a of the pipe 12 Is provided so as not to pass through the central axis CL of the supply unit 11. Therefore, the slurry S that has flowed into the space 11h of the supply unit 11 flows downward while swirling along the inner surface of the supply unit 11 (see FIGS. 2A and 2B). When the slurry S enters the hollow space 6h from the granular material supply port 6a of the main body 6 of the vibrating sieve device 5, the water in the slurry S is the center of the main body 6 in the hollow space 6h of the main body 6. Scatter away from the axis.

Here, the time that the metal powder m can follow the water in the slurry S differs depending on its size, in other words, its weight.

For example, the metal powder mc having a small particle size, in other words, the light metal powder mc, can move following the flow of water in the slurry S, so that it swirls along the inner surface of the supply unit 11 together with the water in the slurry S. .. Then, when the water in the slurry S scatters away from the central axis of the main body 6, it scatters together with the water in the slurry S so as to move away from the central axis of the main body 6 (see FIG. 2A). Then, the metal powder m falls into a region (region C in FIG. 2C) away from the central portion of the sieve net 7 located outside the inner surface of the supply portion 11. The distance between the position where the metal powder mc falls and the central portion of the sieve net 7 changes according to the weight of the metal powder mc.

On the other hand, since the metal powder ma having a large particle size, in other words, the heavy metal powder ma, cannot follow the flow of water in the slurry S, when the slurry S enters the supply unit 11, it is separated from the water in the slurry S. Then (see FIG. 2 (A)), it falls near the central portion of the slurry net 7 (region A in FIG. 2 (C)). In other words, the heavy metal powder ma falls below the supply unit 11, that is, in the region below the granular material supply port 6a of the main body unit 6.

Further, since the flow velocity of the slurry S entering the supply unit 11 gradually decreases while swirling, the metal powder mb intermediate between the two is contained in the slurry S with the passage of time according to its size and weight. It becomes impossible to follow the flow of water. Then, when the flow of water cannot be followed, the metal powder mb separates from the water in the slurry S and falls on the sieve mesh 7. In this case, the metal powder mb will fall in the vicinity immediately below the inner surface of the supply unit 11 (region B in FIG. 2C).

As described above, according to the granular material supply device 10 of the present embodiment, the metal powder m in the slurry S supplied from the granular material supply port 6a of the main body 6 is not limited to the region below the supply unit 11. , Can be dropped over a wide range of the sieve net 7. Then, since it is possible to prevent only the damage in the central portion of the sieve net 7 from progressing, the life of the sieve net 7 can be extended.

Moreover, the metal powder m in the slurry S can be supplied onto the sieve mesh 7 so as to be evenly distributed to some extent. Then, as compared with the case where the metal powder m is solidified to some extent and deposited on the sieve net 7, the metal powder m that passes through the mesh of the sieve net 7 among the metal powder m is quickly passed through the sieve net 7. be able to. Therefore, the efficiency of separating the metal powder m can be improved.

<About piping 12>
The pipe 12 may be arranged in any way between the container 2a and the supply unit 11, but there is a portion between the container 2a and the supply unit 11 higher than the connection portion with the container 2a. It may be arranged. More specifically, the pipe 12 may be arranged so as to have a portion extending upward from the connection portion with the container 2a. For example, as shown in FIG. 1, the pipe 12 may be arranged so as to be connected to the supply unit 11 after being bent upward once in the vicinity of the connection portion with the container 2a.

Further, the pipe 12 may be installed so that the container 2a is higher than the supply unit 11. In this case, if the difference in height between the container 2a and the supply unit 11 becomes more than a certain level, the fluid is supplied from the container 2a with a certain flow velocity due to the flow using the head pressure, even if the fluid supply device 16 is not provided. The slurry S can be supplied to the unit 11.

<When operating in a dry manner>
In the above example, the case where the granular material supply device 10 of the present embodiment supplies the metal powder m as a slurry S mixed with water to the vibrating sieve device 5 has been described. However, the metal powder m may be supplied to the vibrating sieve device 5 by a gas such as air. Even in this case, if the gas is flowed from the container 2a to the vibrating sieve device 5 at a flow velocity such that the metal powder m moves following the air flow to some extent, the metal powder m is supplied so as to be dispersed on the sieve net 7. can. That is, the same effect as when supplying the slurry S to the vibrating sieve device 5 can be obtained. Here, the "flow velocity at which the metal powder m moves following the air flow to some extent" means that a gas such as air can form a swirling flow along the inner surface of the supply unit 11, and the metal powder is formed in the swirling flow. It means a flow velocity at which m (which may be all or part) can follow and move to some extent.

<About the fluid supply unit 15>
In the above example, the case where the container of the fluid supply unit 15 is the container 2a of the water atomizing device 2 has been described, but the container of the fluid supply unit 15 may be any one capable of accommodating granules, and is particularly limited. Not done.

Further, in the above example, the case where the fluid supply unit 15 supplies the fluid to the pipe 12 via the container has been described. The fluid supply unit 15 may directly supply the slurry S or a mixture of gas and granules to the pipe 12.

Further, the fluid supply device 16 may be provided in the pipe 12. That is, in the pipe 12, the fluid supply device 16 may be provided between the container 2a and the supply unit 11. In this case, the fluid supply device 16 is operated in a state where the water W and the metal powder m are mixed by the water flow in the atomizing in the container 2a. Then, the metal powder m is supplied into the hollow space 6h of the main body 6 of the vibrating sieve device 5 in the state of the slurry S in which the metal powder m in the container 2a and the water are mixed together with the water W in the container 2a. can do. Even in such a configuration, the metal powder m can be supplied to the vibrating sieve device 5 while the water atomizing device 2 is operated, that is, the metal powder m is formed by the water atomizing device 2.

The granular material supply device of the present invention is suitable as a device for supplying metal powder such as copper and tin to a vibrating sieve device and the like.

1 Equipment 2 Water atomizing device 2a Container 5 Sieve net 6 Main body 6a Raw material supply port 6b Second discharge port 6c First discharge port 6h Hollow space 7 Sieve net 10 Granular material supply device 11 Supply part 11a Opening 12 Piping 15 Fluid supply Part 16 Shaft member 17 Weight 18 Guide member m Metal powder W Water

Claims (7)

It is a granule supply device that supplies granules to a sieve device that separates granules by a sieve net.
A supply unit having a cylindrical space communicated with a hollow space inside the sieving device through a discharge opening provided at one end in the axial direction.
A fluid supply unit that supplies granules together with the fluid to the space of the supply unit,
It is provided with a pipe that connects the fluid supply unit and the supply unit.
The supply unit
The discharge opening is connected to the sieving device so as to be above the sieving net of the sieving device and facing the sieving net.
The piping is
One end thereof is connected to a supply opening provided on the side surface of the supply unit.
The extension line of the central axis of the pipe at the connection position with the supply opening is arranged so as not to pass through the central axis of the space of the supply portion .
The fluid supply unit is
A granular material supply device characterized by supplying a fluid having a flow velocity forming a swirling flow flowing along the inner surface of the supply unit. The fluid supply unit is
Equipped with a container for containing granules,
The piping is
The supply unit and the container of the fluid supply unit are connected to each other.
The fluid supply unit is
The granular material supply device according to claim 1, wherein the container is provided so as to supply a fluid and supply the granular material together with the fluid from the container. The granules were formed by a water atomizing device.
The container of the fluid supply unit
The granular material supply device according to claim 1 or 2, which is disposed below the water atomizing device and is arranged so as to collect the granular material formed by the water atomizing device. The fluid supply unit is
Equipped with a container for containing granules,
The piping is
The supply unit and the container of the fluid supply unit are connected to each other.
The granular material supply device according to claim 1, 2 or 3, wherein the fluid supply unit is arranged so as to have a portion extending upward from the connection position with the container. It is a granule supply method for supplying granules to a sieving device that separates granules by a sieving net.
The sieving device has
A supply unit having a cylindrical space communicated with the hollow space inside the sieving device is connected through a discharge opening provided at one end in the axial direction.
The supply unit
The discharge opening is connected to the sieving device so as to be above the sieving net of the sieving device and facing the sieving net.
Granules are formed in the supply unit together with a fluid having a flow velocity that does not pass through the central axis of the space of the supply unit and forms a swirling flow along the inner surface of the supply unit from the supply opening provided on the side surface of the supply unit. A granular material supply method characterized by supplying to a space. The granules were formed by a water atomizing device.
The method for supplying a granular material according to claim 5, wherein the granular material is supplied to the space in the supply unit together with the fluid from a container for collecting the granular material formed by the water atomizing device. The method for supplying a granular material according to claim 6, wherein the granular material is supplied from the container together with the fluid to the space in the supply unit while continuing to form the granular material by the water atomizing device.

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