JPH0685074U - Classifier - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a classifier that improves classification accuracy. [Structure] The horizontal body 5 is provided with a raw material supply device 22 and a gas supply device 21. The raw material supply device 22 is formed by the raw material supply port 1, the gas reservoir 2, and the dispersion nozzle 3. The raw material introduction pipe 4 is connected between the dispersion nozzle 3 and the main body 5. A pair of classification plates A7a and B7b are provided in the main body 5 to form a classification chamber 23. The classifying plate 7 is connected to the fine powder discharge pipe 9. The position of the classifying plate 7 is adjusted by operating the interlocking member 10.
The raw material B is classified by the action of the gas C ejected from the gas supply device 21 into the classification chamber 23. Classification plate A7a and classification plate B7
Since b and b are arranged symmetrically with respect to the ejection portion of the gas C, the classification chamber 23 is preferably formed, so that the gas C airflow is not hindered. Further, a wide range of classification points can be set by operating the interlocking member 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a classifier, and more particularly, to a gas-flow classifier that separates and separates particles constituting a raw material by applying an air stream to the raw material in the form of powder or granules, according to size, weight, etc. It is a thing.

[0002]

[Prior art and its problems]

 Conventionally, when classifying powders and granules of various sizes, centrifugal force is applied to the powders and granules by the action of an air flow, and the centrifugal force causes the powders and granules to be separated into particles. It was common to separate and classify according to the size and weight of the. In this case, the powder or granules are usually so-called secondary agglomerated at the stage of the raw material, and therefore it is important to disperse the powder or granules into the primary particles as a pretreatment. However, the current situation is that this dispersion treatment was insufficient and the target product could not be obtained, resulting in a decrease in efficiency.

In addition, in the conventional classifier, when the powder or granules are introduced into the centrifugal field where the air flow is acting, the powder or granules themselves become a resistance and the air flow is disturbed. there were. When turbulence occurs in the air flow forming the centrifugal field as described above, it becomes impossible to apply a predetermined centrifugal force to the charged particles, so that the classification accuracy decreases.

The present invention solves the above problems, and an object of the present invention is to provide a classifier that can improve classification efficiency and classification accuracy.

[0005]

[Means for solving problems]

 In order to solve the above problems, the present invention provides, as a first invention, a raw material supply device for supplying a raw material to the inside of the main body, and a gas supply for ejecting gas into the main body. An apparatus, a classifying plate that divides the inside of the main body to form a classification chamber, and a discharge pipe are provided, and the raw material supplied from the raw material supply apparatus is supplied to the classification chamber by the action of the gas flow. A classifier that discharges the product from the discharge pipe as a product according to the classified size in several stages by a raw material introduction pipe that guides the raw material from the raw material supply device to the gas ejection portion. It is arranged such that the classification plate is formed of a plurality of classification plates A and B, and the classified products at the same stage are discharged as products from the same discharge pipe. . As a second invention including the first invention, the classifying plate is formed by a pair of classifying plates A and B, and the classifying plate A and the classifying plate B are connected to each other at the gas ejection portion. The main body is arranged symmetrically with respect to the axis of the main body. In addition, as a third invention including the first invention, the gas supply device has a structure in which a jet vane for guiding the gas in a tangential direction of the main body is provided at a jet portion of the gas. It is a thing. As a fourth invention including the first invention, in the raw material supply device, the raw material supply port and the opening are expanded outward, and the opening is opposed to the opening of the raw material supply port. In this state, the dispersion nozzle is provided with a slight distance between the dispersion nozzle and a gas reservoir that closes the space between the dispersion nozzle and the raw material supply port and supplies high-pressure gas to the closed space. It has a structure in which it is connected to the introduction pipe. As a fifth device including the second device, the discharge pipe is formed by a pair of fine powder discharge pipe A and a fine powder discharge pipe B, and the classification plate A can communicate with the classification chamber. A fine powder discharge pipe A, which is reciprocally movable in the axial direction, is connected to the main body, an interlocking member A is provided between the fine powder discharge pipe A and the main body, and the classification plate B is connected to the classification chamber. A fine particle discharge pipe B, which is capable of communicating and reciprocates in the axial direction with respect to the main body, is connected, and an interlocking member B is provided between the fine powder exhaust pipe B and the main body. By the operation, the fine powder discharge pipe A and the classifying plate A are integrally reciprocated with respect to the main body, and the fine powder discharge pipe B and the classifying plate B are operated by the operation of the interlocking member B. It has a structure in which the It is.

[0006]

[Action]

 By adopting the above-mentioned means in this invention, the raw material supplied from the raw material supply device is introduced into the classification chamber inside the main body through the raw material introduction pipe, and the gas ejected from the gas supply device is introduced into this classification chamber. The centrifugal force is applied to the raw material under the action of the air flow. As a result, among the constituents of the raw material, large particles and heavy particles are separated to the outside, and small particles and light particles are separated to the inside in several stages, and in that state they are discharged as products from the discharge pipe. There is. At this time, by providing the raw material introducing pipe for guiding the raw material to the gas jetting portion, the raw material supplied from the raw material supply device can appropriately act on the gas flow, so that the raw material can be supplied to the raw material in the classification chamber at a predetermined rate. The centrifugal force of can be applied.

Then, the classifying plate is formed by a plurality of classifying plates A and B, and the classifying plate A and the classifying plate B are arranged symmetrically with respect to the gas ejection portion, whereby the classification chamber is Since it is formed by being divided by the classifying plate A and the classifying plate B in the main body, the flow of the gas ejected and formed in the classifying chamber is not obstructed. Therefore, the gas flow can be made ideal, and a centrifugal field suitable for the classification chamber can be formed.

Further, since the gas supply device always supplies the gas into the classification chamber, the raw material supplied into the classification chamber does not adhere to the inner wall of the main body during the classification process. As a result, the powder and granules are prevented from staying in the main body, and the classification efficiency is improved.

Further, by operating the interlocking member, the position of the classifying plate in the main body can be arbitrarily changed. At this time, by operating the interlocking member, it is possible to adjust the set positions of the classifying plate A and the classifying plate B with the intermediate portion between the facing surfaces thereof being located at the site where the gas ejection portion is located. Therefore, it is possible to easily form a suitable classification chamber regardless of the positional relationship between the gas supply device and the classification plate. This makes it possible to set classification points in a wide range.

[0010]

【Example】

 Embodiments of the present invention shown in the drawings will be described below. FIG. 1 is a diagram showing an embodiment of a classifier according to the present invention. That is, in the classifier shown in FIG. 1, the raw material supply device 22 for supplying the raw material B into the main body 5 and the gas C in the tangential direction are jetted into the main body 5 into the main body 5 having a horizontal cylindrical shape. It comprises a gas supply device 21, a classification plate 7 that divides the inside of the main body 5 to form a classification chamber 23, and discharge pipes 6 and 9. Between the raw material supply device 22 and the main body 5, a raw material introduction pipe 4 for guiding the raw material B 1 to the gas C ejection portion is provided. Then, the raw material B supplied into the main body 5 is classified in the classifying chamber 23 by the action of the gas C, and then discharged as the products D and E from the discharge pipes 6 and 9.

At this time, the classifying plate 7 is formed of a classifying plate A7a and a classifying plate B7b which are symmetrically arranged around the gas C ejection portion. Further, the discharge pipe 9 is formed of a fine powder discharge pipe A9a which communicates with the classification chamber 23 through the classification plate A7a and a fine powder discharge pipe B9b which communicates with the classification chamber 23 through the classification plate B7b. The fine powder discharge pipe A9a can be moved by an interlocking member A10a, and the fine powder discharge pipe B9b can be moved by an interlocking member B10b. The raw material supply device 22 hermetically seals between the raw material supply port 1, the dispersion nozzle 3 which is provided to face the raw material supply port 1 with a slight distance from the opening, and the raw material supply port 1 and the dispersion nozzle 3. It is formed by the gas reservoir 2 for supplying the gas.

In FIGS. 1 and 2, the main body 5 has a horizontal cylindrical shape with both ends open, and is fixed to the upper part of the base 20. The main body 5 is provided with a discharge pipe 6 for guiding the inner space to the outside and closing both ends of the main body 5. At this time, the discharge pipe 6 is formed by a pair of coarse powder discharge pipes A6a and B6b provided at both ends of the main body 5 so as to be open downward and symmetrical with each other. One coarse powder discharge pipe A6a is connected to the coarse powder tank 16 via a communication pipe A13a, and the other coarse powder discharge pipe B6b is connected to the coarse powder tank 16 via a communication pipe B13b. As a result, the main body 5 and the coarse powder tank 16 communicate with each other. In the figure, 15 is a cover of the coarse powder tank 16, 17 is a coarse powder outlet, and 17a is a valve for opening and closing the coarse powder outlet 17.

A classifying plate 7 is provided inside the main body 5. The classifying plate 7 is formed in a disk shape having a hole in the center, and one end face of the classifying plate 7 is formed so as to gradually incline toward the other end face as it goes radially outward. The classifying plate 7 is formed in a hat shape as a whole. The classifying plate 7 is formed of a pair of classifying plates A7a and B7b having the same shape. The classifying plate A7a and the classifying plate B7b are arranged coaxially with the main body 5 in such a state that one end faces having the inclined surfaces face each other, whereby the classifying plate A7a is provided in the central portion of the main body 5. And a classification plate B7b to form a classification chamber 23.

The classification plate 7 is connected to a discharge pipe 9 formed by a fine powder discharge pipe A9a and a fine powder discharge pipe B9b. The hole formed in the center of one classification plate A7a is connected to the opening of the fine powder discharge pipe A9a, and the hole formed in the center of the other classification plate B7b is the fine powder discharge pipe B9b. It is connected to the opening. At this time, the fine powder discharge pipe A9a penetrates through the central portion of the closed end face on one side of the main body 5 to extend to the outside, and the fine powder discharge pipe B9b penetrates the central portion of the closed end face on the other side of the main body 5 to the outside. The fine powder discharge pipe A9a and the fine powder discharge pipe B9b are each movable in the axial direction with respect to the main body 5.

One fine powder discharge pipe A9a is connected to the fine powder discharge pipe 12 via a communication pipe A11a, and the other fine powder discharge pipe B9b is connected to the fine powder discharge pipe 12 via a communication pipe B11b. As a result, the classification chamber 23 is electrically connected to the outside through the classification plate 7 and the fine powder discharge pipe 9.

An interlocking member 10 located outside the main body 5 is provided between the main body 5 and the fine powder discharge pipe 9. At this time, an interlocking member A10a is provided between the main body 5 and the one fine powder discharge pipe A9a, and an interlocking member B10b is provided between the main body 5 and the other fine powder discharge pipe B9b. The interlocking member A10a is formed of a bolt 26 and a nut 27. The bolt 26 is attached to a fixed seat 25 fixed to the outer surface of the closed end on one side of the main body 5, and has a male portion extending in the axial direction of the main body 5. A nut 27 is screwed onto the bolt 26. To be done.

The nut 27 is rotatably attached to a mounting portion 28 fixed to the fine powder discharge pipe A9a, and by screwing the nut 27 and the bolt 26, the fine powder discharge pipe A9a is attached to the main body. 5 is held in a movable state. When the nut 27 is rotated, the nut 27 moves in the axial direction along the bolt 26, so that the fine powder discharge pipe A9a moves in the axial direction along with the movement of the nut 27. ing.

Like the interlocking member A10a, the interlocking member B10b is also formed of a bolt 26 and a nut 27. The bolt 26 is attached to a fixed seat 25 fixed to the outer surface of the closed end on the other side of the main body 5, and has a male screw portion extended in the axial direction of the main body 5. A nut 27 is screwed onto the bolt 26. . The nut 27 is rotatably attached to a mounting portion 28 fixed to the fine powder discharge pipe B9b, and the fine powder discharge pipe B9b can be moved with respect to the main body 5 by screwing the nut 27 and the bolt 26. It will be held in a stable state. When the nut 27 is rotated, the nut 27 moves in the axial direction along the bolt 26, so that the fine powder discharge pipe B9b moves in the axial direction along with the movement of the nut 27. ing.

A gas supply device 21 having a vane 14 is provided at a position of the main body 5 corresponding to the classification chamber 23 formed by the classification plate A 7 a and the classification plate B 7 b. The gas supply device 21 is formed in an annular shape so as to surround the outer periphery of the main body 5, and a closed annular gas guide chamber 18 is formed therein. The gas guide chamber 18 communicates with a gas introducing pipe 19 for introducing the gas C supplied from the outside into the gas introducing chamber 19. At this time, the gas introducing pipe 19 is connected from an arbitrary tangential direction of the outer peripheral surface of the gas supply device 21. To be done.

A vane 14 for guiding the gas C introduced into the gas guide chamber 18 from the gas introduction pipe 19 to the inside of the main body 5 is provided on the inner circumference side of the gas supply device 21. There is. At this time, an annular air outlet 14a is formed in the portion of the main body 5 corresponding to the classification chamber 23, and the gas guide chamber 18 is electrically connected to the inside of the main body 5 through the air outlet 14a. . A plurality of vanes 14 are provided equidistantly in the circumferential direction with the vanes 14 facing the tangential direction of the main body 5 at the opening of the air outlet 14a (see FIG. 3). In this case, the outlet 14a is located at the center between the facing surfaces of the classifying plate A7a and the classifying plate B7b.

Therefore, the gas supply device 21 injects the gas C introduced from the gas introduction pipe 19 into the main body 5 through the air outlet 14a. At this time, the gas C is guided so as to face the tangential direction of the main body 5 when passing through the vanes 14 provided at the air outlets 14a, so that the air flow of the gas C is directed. Has become.

Above the main body 5, a raw material supply device 22 formed of a raw material supply port 1, a dispersion nozzle 3 and a gas reservoir 2 is provided.

As shown in FIG. 2, the raw material supply port 1 forming the raw material supply device 22 is formed in a so-called funnel shape with a truncated conical cylindrical shape as a whole, and its head portion. The raw material B is introduced through the large diameter opening. The raw material supply port 1 has a small-diameter opening, which is the bottom thereof, communicating with the dispersion nozzle 3 via the gas reservoir 2.

The dispersion nozzle 3 is in the shape of a truncated cone as a whole, and the inside thereof is formed so that its diameter gradually increases downward. The dispersion nozzle 3 is formed in such a shape that its small diameter opening is curved and spreads outward, and the small diameter opening is made to face the small diameter opening of the raw material supply port 1. At this time, the dispersion nozzle 3 is arranged with a slight gap e formed between the surfaces facing the raw material supply port 1, whereby the raw material supply port 1 and the dispersion nozzle 3 are separated by the gap e. I am trying to communicate.

A gas reservoir 2 formed so as to surround the gap e is provided between the dispersion nozzle 3 and the raw material supply port 1. The gas reservoir 2 has a cylindrical shape with both ends closed, and accommodates a small diameter opening of the raw material supply port 1 and a small diameter opening of the dispersion nozzle 3 therein. Further, a pipe communicating with an external gas supply source (not shown) is connected to an arbitrary position on the circumferential surface of the gas reservoir 2 so that the high pressure gas F passes from the gas supply source through the pipe. And is guided into the gas reservoir 2.

A raw material introduction pipe 4 that connects the raw material supply device 22 and the main body 5 is connected to each other. The raw material introduction pipe 4 is provided so as to pass through the central portion of a tubular mounting portion 24 formed so as to face the tangential direction at an arbitrary position of the gas supply device 21. At this time, the raw material introduction pipe 4 has one end thereof connected to the dispersion nozzle 3 of the raw material supply device 22 by penetrating the closed end of the attachment portion 24, and the other end connected to the main body 5. To do. As a result, the raw material supply device 22 and the inside of the main body 5 are electrically connected to each other via the raw material introduction pipe 4.

At this time, the raw material introduction pipe 4 is arranged so that the opening portion on the main body 5 side is opened to a part of the outlet port 14 a in which the vane 14 is provided. Thereby, the raw material B supplied from the raw material supply device 22 is introduced into the classification chamber 23 formed in the main body 5 by passing through the raw material introducing pipe 4. In this case, the opening of the raw material introduction pipe 4 on the main body 5 side is opened in the tangential direction of the main body 5, that is, in the direction following the mounting direction of the vane 14, whereby the raw material B is fed. The raw material B is directed in the same direction as the gas flow ejected from the vane 14 when being guided from the No. 4 to the classification chamber 23.

Note that 8 a is support A and 8 b is support B. The support A8a is provided inside the main body 5 to support the fine powder discharge pipe A9a in a movable state, and the support B8b is provided inside the main body 5 to move the fine powder discharge pipe B9b. It supports in such a state.

Next, the operation of the above will be described. First, the raw material B in which particles of various sizes are mixed is charged into the raw material supply port 1, and a high pressure gas F is supplied to the gas reservoir 2 of the raw material supply device 22 from a pressure supply source (not shown). Then, the high-pressure gas F flows through the gap e between the raw material supply port 1 and the dispersion nozzle 3 into the interior of the dispersion nozzle 3 through the opening. At this time, since the opening of the dispersion nozzle 3 is formed in a curved shape, the high-pressure gas F flowing into the dispersion nozzle 3 becomes an adhering flow along the curvature of the opening to generate a wall surface flow. Then, a so-called co-under effect is brought about, and as a result, the axial center portion of the dispersion nozzle 3 becomes negative pressure.

Then, by the action of the negative pressure generated in the dispersion nozzle 3, the raw material B is sucked into the dispersion nozzle 3 from the raw material supply port 1, and at the same time, the secondary air that is the secondary gas existing outside is sucked. A is also sucked into the dispersion nozzle 3 from the raw material supply port 1 together with the raw material B.

The raw material B and the secondary air A sucked into the dispersion nozzle 3 are introduced into the main body 5 through the raw material introduction pipe 4. At this time, since the raw material introduction pipe 4 is disposed inside the main body 5 so as to open to the classification chamber 23 defined by the classification plate A7a and the classification plate B7b, it is supplied from the raw material supply device 22. The raw material B is introduced into the classification chamber 23 by the raw material introduction pipe 4.

On the other hand, in the gas supply device 21, the gas C introduced from the gas introduction pipe 19 into the gas guide chamber 18 is ejected from the outlet 14 a to the classification chamber 23 in the main body 5 via the vane 14. . At this time, when the gas C passes through the vanes 14, the gas C is introduced in the tangential direction of the main body 5, so that a swirling flow is generated in the classification chamber 23 due to the air flow of the gas C generated as a result. A kind of centrifugal field is formed in the classification chamber 23.

Therefore, the raw material B guided to the classifying chamber 23 by the raw material introducing pipe 4 follows the inner wall surface of the main body 5 in the classifying chamber 23 by the action of the swirling airflow of the gas C ejected from the gas supply device 21. In this way, the material B turns in the circumferential direction, and the centrifugal force is applied to the raw material B at this time.

As a result of the centrifugal force being applied to the raw material B, among the constituents of the raw material B, large particles and heavy particles are separated to the outside, and small particles and light particles are separated to the inside, respectively. Granules composed of large particles and heavy particles separated to the outside are discharged to the outside through a coarse powder discharge pipe 6, and small particles and light particles separated to the inside are discharged through a fine powder discharge pipe 9. It is discharged to the outside.

At this time, the large particles and the heavy particles separated to the outside by the action of the centrifugal force are swung along the inner wall of the main body 5 as they are from the classification chamber 23 on both sides in the axial direction (left and right in FIG. 1). Direction) from the coarse powder discharge pipe A6a to the coarse powder tank 16 via the communication pipe A13a, and the other from the coarse powder discharge pipe B6b to the coarse powder tank 16 via the communication pipe B13b. , Coarse powder is discharged as product D.

Further, the granular material composed of small particles or light particles separated inside in the classification chamber 23 is introduced into the fine powder discharge pipe 9 through a hole formed in the center of the classification plate 7, Furthermore, while moving along the inner wall of the fine powder discharge pipe 9 and moving to both sides in the axial direction (left and right in FIG. 1), on the one hand, from the fine powder discharge pipe A9a to the fine powder discharge pipe 12 via the communication pipe A11a, and on the other hand Then, from the fine powder discharge pipe B9b through the communication pipe B11b to the fine powder take-out pipe 12, the fine powder is collected as a product E by a fine powder collector (not shown).

As a result of the above, the supplied raw material B is separated and classified according to the size and weight of the particles constituting the raw material B and classified into two stages, and a product D composed of large particles and heavy particles is obtained. , A product E consisting of small particles or light particles.

In the above classifier, it is possible to suitably cause the gas C jetted from the gas supply device 21 to act on the raw material B guided from the raw material introduction pipe 4 to the classification chamber 23. You can do it.

That is, the raw material introduction pipe 4 connecting between the raw material supply device 22 and the classification chamber 23 formed inside the main body 5 has an opening on the main body 5 side at a portion where the vane 14 is located. The raw material B supplied from the raw material supply device 22 to the classification chamber 23 passes through the raw material introduction pipe 4 so that the swirling airflow of the gas C acts on the raw material B. You will be guided.

Further, at this time, the raw material introducing pipe 4 is arranged in a state where the opening thereof is opened so as to follow the mounting direction of the vane 14, so that the inside of the classification chamber 23 for the raw material B by the raw material introducing pipe 4 is arranged. The direction of introduction of the gas C is the same as the direction of the flow of the gas C directed by the vane 14. For this reason, the raw material B introduced into the main body 5 does not become a resistance against the gas C flow.

That is, the gas supply device 21 ejects the gas C in the tangential direction of the main body 5 due to the presence of the vane 14, thereby generating a swirling airflow of the gas C in the classification chamber 23. On the other hand, since the raw material introduction pipe 4 is arranged so that the opening thereof is oriented in the tangential direction of the main body 5, the raw material B introduced from the raw material introduction pipe 4 into the classification chamber 23 is the raw material B. Within 23, it will be guided to go tangentially. As a result, the raw material B is oriented in the direction along the swirling airflow of the gas C.

Therefore, the turbulence of the swirling airflow of the gas C generated in the classifying chamber 23 can be suppressed, so that the airflow of the gas C can be appropriately applied to the raw material B. As a result, a predetermined centrifugal force is always applied to the raw material B to be classified, and it is possible to accurately obtain a powder or granular material having a required predetermined particle size.

In the above case, the raw material B introduced into the classifying chamber 23 is guided by the raw material introduction pipe 4 toward the tangential direction of the main body 5 and swirls along the inner wall of the main body 5. Since the gas C is constantly ejected from the outlet 14a of the gas supply device 21, the raw material B swirling in the classifying chamber 23 is classified without adhering to the inner wall of the main body 5, and as a result, , The classification accuracy is improved.

Further, in the above classifier, the swirling airflow of the gas C in the classifying chamber 23 can be made ideal.

That is, since the classification chamber 23 is formed by partitioning the inside of the main body 5 with the pair of classification plates 7, the air flow of the gas C ejected from the gas supply device 21 into the classification chamber 23 is obstructed. There is no such thing.

That is, in order to make the swirling airflow of the gas C in the classifying chamber 23 ideal, it is important that the airflow of the gas C ejected from the gas supply device 21 is not disturbed. However, in the above case, since the both end surfaces of the classification chamber 23 are constituted by the classification plate A7a and the classification plate B7b, the gas C airflow in the classification chamber 23 is centered on the gas C outlet 14a. It becomes possible to move in both directions. Therefore, the gas C ejected from the air outlet 14a is formed as a smooth and continuous air flow in the classification chamber 23, thereby making the swirling air flow of the gas C ideal. You can do it.

As a result, the air flow of the gas C can be appropriately applied to the raw material B introduced from the raw material introducing pipe 4 into the classification chamber 23, so that the classification accuracy is further improved and so-called sharp classification is performed. You will be able to

Here, when changing the set position (classification point) of the classifying plate 7, the interlocking member 10 may be operated.

That is, the classifying plate 7 is connected to the fine powder discharge pipe 9 provided in the main body 5 in a state of being movable in the axial direction, and the fine powder discharge pipe 9 is connected to the main body 5 by the interlocking member 10. Since the reciprocating member is provided, the position of the classifying plate 7 inside the main body 5 can be arbitrarily set and changed by operating the interlocking member 10.

That is, the interlocking member 10 includes the bolt 26 provided on the fixed seat 25 integrally attached to the main body 5 so as to extend in the axial direction of the main body 5, and the attachment portion of the fine powder discharge pipe 9. A nut 27, which is rotatably attached to the body 28, is formed by being screwed on the outside of the main body 5. Therefore, by rotating the nut 27 outside the main body 5, the nut 27 moves integrally with the mounting portion 28 and the fine powder discharge pipe 9 in the axial direction, and as a result, the fine powder discharge pipe 9 moves. The position of the classifying plate 7 connected to the end can be freely changed.

Therefore, since the classification point can be easily changed from the outside in this way, the width of the classification chamber 23 defined by the classification plate 7 can be arbitrarily determined. Therefore, as a result, the degree of classification, that is, the granularity of the products D and E can be easily set.

In the above classifier, the classification points can be set in a wide range.

That is, the classifying plate 7 is composed of a classifying plate A7a and a classifying plate B7b which are symmetrically arranged on the axis of the main body 5 around the gas C ejection portion, and the classifying plate A7a is Since the position of the classifying plate B7b can be changed by operating the interlocking member A10a and the classifying plate B7b can be changed by operating the interlocking member B10b, the respective setting positions of the classifying plate A7a and the classifying plate B7b can be arbitrarily set. It can be adjusted to.

Therefore, the classifying plate A7a and the classifying plate B7b are symmetrically adjusted by operating the interlocking member A10a and the classifying plate B7b by operating the interlocking member B10b and the interlocking member B10b, respectively. The middle between the facing surfaces can always be located at the opening portion of the outlet port 14a. Therefore, the classifying plate A7a and the classifying plate B7b can be made completely symmetrical with respect to the jetting portion of the gas C 2, so that a wide range of classification points can be set.

That is, the classification point has a great influence on the classification efficiency due to the positional relationship between the gas supply device 21 and the classification plate 7. In the above, however, the pair of classification plates A7a and the classification plate Since the plate B7b and the plate B7b are symmetrically positioned with respect to the jetting portion of the gas C, a centrifugal field due to the air flow of the gas C can be suitably formed in the classification chamber 23. As a result, it is possible to set the classification point in an optimum state at all times with a simple operation.

In the above case, if the distance between the facing surfaces of the classifying plate A7a and the classifying plate B7b is increased, the classification point is set smaller. That is, when the width between the classifying plate A7a and the classifying plate B7b is wide, the velocity of the gas C flowing into the fine powder discharge pipe 9 becomes small, so that the particles entrained in the gas C are relatively small and light particles are obtained as fine powder. It is designed to be used. Conversely, if the distance between the facing surfaces of the classifying plate A7a and the classifying plate B7b is made small, the classification point is set large. In other words, if the width between the classifying plate A7a and the classifying plate B7b is narrow, the velocity of the gas C flowing into the fine powder discharge pipe 9 becomes large, so that the particles entrained in the gas C are relatively large and heavy particles are obtained as fine powder. It is designed to be used.

In the above classifier, since the raw material supply device 22 sufficiently performs the dispersion treatment which is the pretreatment of the classification treatment, the raw material B can be efficiently classified. ing.

That is, since the opening of the dispersion nozzle 3 of the raw material supply device 22 is curved outward and expanded, when the high pressure gas F flows from the gas reservoir 2 into the opening of the dispersion nozzle 3. Therefore, a high-speed airflow is generated inside the dispersion nozzle 3.

In other words, by enlarging the diameter of the opening of the dispersion nozzle 3, the dispersion nozzle 3 has a small diameter portion whose diameter is smoothly narrowed in the middle thereof, so that the high pressure gas from the gas reservoir 2 is discharged. When F flows into the opening of the dispersion nozzle 3, due to the Coanda effect, an adhering flow is generated on the wall surface of the dispersion nozzle 3 to generate a wall surface flow. As a result, a large axial center portion inside the dispersion nozzle 3 is generated. Negative pressure starts to occur.

Therefore, the raw material B and the secondary gas A are sucked from the raw material supply port 1 by the action of the large negative pressure generated inside the dispersion nozzle 3. Then, the sucked raw material B and secondary gas A become a high-speed flow and are sucked into the dispersing nozzle 3, so that the sucked secondary gas A and the adhering flow on the inner wall of the dispersing nozzle 3 are generated. The raw material B is strongly dispersed due to the difference in speed.

In the above case, in order to efficiently classify, it is most important that the particles constituting the raw material B are separated beforehand. If this is insufficient, efficient classification is possible. Although it cannot be done, by utilizing the Coanda effect, each particle constituting the raw material B is surely dispersed and separated before the classification treatment, and the classification treatment inside the main body 5 after this is surely performed. It is supposed to be done in.

Although the main body 5 is of the horizontal type in the above embodiment, the main body 5 may be of the vertical type. In that case, the fine powder discharge pipe A9a and the fine powder discharge pipe B9b are arranged so as to be vertically positioned on the vertical line, and the coarse powder discharge pipe 6 is one coarse powder discharge pipe located at the bottom of the main body 5. Only A6a need be provided.

In the above embodiment, the number of the classifying plates 7 is two, and the classifying plate A7a and the classifying plate B7b are shown as a pair. However, the number of classifying plates may be at least two. The number is not limited to that in the above embodiment.

[0064]

[Effect of device]

 As described above, according to the present invention, in a classifier that is provided with a gas supply device in the main body and performs classification by operating a gas flow, a plurality of classification plates that divide the inside of the main body to form a classification chamber are provided. By using the classifying plates A and B, the gas flow in the classifying chamber is not obstructed. Therefore, in the classifying chamber, a gas flow suitable for the supplied raw material can be made to act, and as a result, classification accuracy is improved and sharper classification can be performed.

When the classifying plate is formed by a pair of classifying plate A and classifying plate B which are symmetrically arranged on the axis of the main body around the gas ejection portion, the interlocking member is operated. Since the setting position of the classifying plate can be adjusted symmetrically, the classifying plate is always positioned in the middle between the facing surfaces of the classifying plate A and the classifying plate B at the site where the gas ejection portion is located. be able to. Therefore, the classification points can be set widely.

Then, by providing the raw material introduction pipe for guiding the raw material from the raw material supply device to the ejection position of the gas ejected from the gas supply device, the raw material supplied from the raw material supply device to the classification chamber is Since it is always affected by a suitable gas flow, the classification accuracy can be further improved.

Further, since the gas supply device always supplies the gas into the classification chamber from the tangential direction of the main body, the raw material supplied to the classification chamber is classified without being attached to the inner wall of the main body. As a result, efficient classification can be performed.

Further, in the raw material supply device, a dispersion nozzle having an enlarged opening, a raw material supply port opposed to the opening with a slight distance therebetween, and a space between the raw material supply port and the dispersion nozzle. By forming a high pressure gas into the dispersion nozzle, a high-speed wall flow is generated in the dispersion nozzle by the Coanda effect when the high pressure gas flows into the dispersion nozzle. As a result, the raw material is sucked from the raw material supply port, and the sucked raw material is strongly dispersed inside the dispersion nozzle to be separated, and then the raw material is classified in the classification chamber. . Therefore, there is an effect that classification can be performed efficiently and with high accuracy.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a classifier according to the present invention.

FIG. 2 is a view showing a main part of this device.

3 is a cross-sectional view taken along line XX in FIG.

[Explanation of symbols]

 1 ... Raw material supply port 2 ... Gas reservoir 3 ... Dispersion nozzle 4 ... Raw material introduction pipe 5 ... Main body 6, 6a, 6b ... Coarse powder discharge pipe 7, 7a, 7b ... Classification plate 8a, 8b ... ... Support 9, 9a, 9b ... Fine powder discharge pipe 10, 10a, 10b ... Interlocking member 11a, 11b, 13a, 13b ... Communication pipe 12 ... Fine powder discharge pipe 14 ... Vane 14a ... Blowout port 15 ... Cover 16 ... Coarse powder tank 17 ... Coarse powder outlet 17a ... Valve 18 ... Gas guide chamber 19 ... Gas introduction pipe 20 ... Base 21 ... Gas supply device 22 ... Raw material supply device 23 ... Classification room 24 …… Mounting part 25 …… Fixing seat 26 …… Bolt 27 …… Nut 28 …… Mounting part A …… Secondary air B …… Raw material C …… Gas D …… Coarse powder E …… Fine powder F… ... high pressure gas

Claims (5)

[Scope of utility model registration request] 1. A raw material supply device (22) for supplying a raw material (B) to the inside of the main body (5) in a cylindrical main body (5).
And a gas supply device (21) for ejecting gas (C) into the main body (5) and a classification plate (which is provided so as to partition the inside of the main body (5) and forms a classification chamber (23) ( 7)
And a discharge pipe (6, 9) are provided, and the raw material supply device (2
The raw material (B) supplied from 2) is classified into several stages in the classification chamber (23) by the action of the gas (C) flow, and the discharge pipe (6, 6) is classified according to the classified size. 9)
Which is a classifier discharged as a product (D, E) from
A raw material introduction pipe (4) for guiding the raw material (B) from the raw material supply device (22) to the gas (C) jetting portion is provided, and the classification plate (7) is divided into a plurality of classification plates A (7a). ), Classification plate B
A classifier characterized in that the product formed in (7b) and classified in the same stage is discharged as a product (D, E) from the same discharge pipe (6, 9). 2. The classifying plate (7) is a pair of classifying plates A (7).
a) and a classification plate B (7b), and the classification plate A (7
The classifier according to claim 1, wherein a) and the classifying plate B (7b) are arranged symmetrically to each other on the axis of the main body (5) about the jetting portion of the gas (C). 3. The gas supply device (21) has a vane (14) for guiding the gas (C) in a tangential direction of the main body (5) at a jet portion of the gas (C). The classifier according to Item 1. 4. The raw material supply device (22) has a raw material supply port (1) and an opening portion that expands outward, and the opening portion faces the opening portion of the raw material supply port (1). A gas that supplies a high pressure gas (F) to the closed space while sealing between the dispersion nozzle (3) and the raw material supply port (1), which are provided with a slight distance in this state. The classifier according to claim 1, which is formed by a reservoir (2), and the dispersion nozzle (3) is connected to the raw material introducing pipe (4). 5. The discharge pipe (9) is formed by a pair of fine powder discharge pipe A (9a) and a fine powder discharge pipe B (9b), and the classification chamber (23) is provided in the classification plate A (7a). A fine powder discharge pipe A (9a), which is capable of communicating with the main body (5) and is capable of reciprocating in the axial direction, is connected between the fine powder discharge pipe A (9a) and the main body (5). Interlocking member A (10
a) is provided, and the classification chamber (2) is provided on the classification plate B (7b).
3) A fine powder discharge pipe B (9b), which is capable of communicating with the main body (5) and is capable of reciprocating in the axial direction with respect to the main body (5), is connected to the fine powder discharge pipe B (9b) and the main body (5). The interlocking member B (10b) is provided between the
By the operation of a), the fine powder discharge pipe A (9a) and the classification plate A (7a) integrally reciprocate with respect to the main body (5), and the interlocking member B (10b) is moved. By operation, the fine powder discharge pipe B (9b) and the classification plate B
The classifier according to claim 2, wherein the classifier (7b) integrally reciprocates with respect to the main body (5).