JPH07277524A - Rotary feeder - Google Patents

Abstract

PURPOSE:To enable supply of a constant amount of powder and grains by exhausting air in a storage space in which powder and grains are pushed via a air passage which faces a connection section of a supply section and a barrel section of a casing on the rise side in the storage space and whose lower end is opened when powder and grains are supplied in the storage space which rises due to rotation of a rotor. CONSTITUTION:A storage space S is rotated to the descent side due to rotation of a rotor 3 to discharge powder and grains and further rises due to its rotation. The storage space S which becomes empty after discharging powder and grains is connected to a hopper 4 via a supply section 22. Consequently, powder and grains are supplied into the storage space S via the supply section 22. At this time, the storage space S is communicated with an air passage 6 formed along a peripheral wall of the hopper 4 via a passage 7A. As a result, air in the storage space S which is pushed out due to supply of powder and grains flows into the air passage 6 and is exhausted via an air pipe 8.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a rotary feeder.

[0002]

2. Description of the Related Art Conventionally, a rotary feeder has been used as an apparatus for quantitatively supplying powder or granules such as pellets and powder. As shown in FIG. 5, the rotary feeder 1 includes a casing 2 including a body portion 21, a supply portion 22 and a discharge portion 23 connected to the body portion 21, and a shaft rotatably attached to the body portion 21 of the casing 2. The supported rotor body 31 and a plurality of vanes 32 that are radially fixed to the rotor body 31 and have their tips slidably contacting the inner wall of the body portion 21.
And a rotor 3 composed of the above, and is arranged between a hopper 4 for accommodating the granular material and an air transport pipe 5. That is,
The upper end opening 22a of the supply unit 22 in the casing 2 is connected to the discharge port 4a of the hopper 4, and the discharge unit 2
The lower end opening 23a of 3 is connected to the inlet 5a of the air transport pipe 5. Then, by rotating the rotor 3, the powder or granular material contained in the hopper 4 passes through the supply portion 22 of the casing 2 and then the pair of adjacent vanes 32 and the body portion 2.
After being accommodated in the accommodation space S formed by the inner wall of 1, the air is exhausted to the air transport pipe 5 through the exhaust portion 23, and is further supplied to the air transport pipe 5 via the blower (not shown). It is designed to be pneumatically transported to the receiving facility (see, for example, Japanese Patent Laid-Open No. 64-2931).

[0003]

However, in such a rotary feeder 1, when the storage space S rotates upward and communicates with the supply section 22, the hopper 4 is moved.
However, there is a problem that the powder particles are not smoothly supplied to the accommodation space S and cannot be supplied in a fixed amount. That is, when the powder or granular material stored in the storage space S is discharged by the rotation of the rotor 3, the compressed air of the air transport pipe 5 is trapped in the storage space S and rotates upward. Then, when the accommodation space S in which the compressed air is confined communicates with the supply unit 22 and the powder particles in the hopper 4 are supplied to the accommodation space S via the supply unit 22,
As a result, the compressed air in the accommodation space S is expelled. At this time,
The pressure-supplied air replaced with the powder and granules is supplied to the supply unit 2
It blows up to the lower part of the hopper 4 via 2 and pushes up the granular material and disturbs it. Therefore, the accommodation space S
As a result of hindering the supply of the granular material to the receiving space, the granular material is transported to the receiving facility without being sufficiently supplied to the accommodation space S,
There is a problem that the product is manufactured by using the powder or granules which are less than the set transport amount, so that the manufacturing capacity is suppressed to be low or the quality of the product is not constant. This tendency is particularly remarkable in the granular material having a small specific gravity.

Although it is conceivable to rotate the rotor 3 at a low speed, in this case as well, the transport amount per unit time is reduced and the transport efficiency is reduced. It cannot be adopted.

The present invention has been made in view of the above problems, and provides a rotary feeder capable of quantitatively supplying powder particles without reducing the rotation speed of the rotor.

[0006]

DISCLOSURE OF THE INVENTION The present invention is directed to a casing including a body portion and a supply portion and a discharge portion connected to the body portion, a rotor body rotatably supported by the body portion of the casing, and a rotor body. The rotor is composed of a plurality of vanes that are radially fixed to the rotor body and the tip of which can slidably contact the inner wall of the body.By rotating the rotor, the rotor is housed in a hopper connected above the supply part of the casing. In the rotary feeder in which the formed powder and granules are accommodated in the accommodation space formed by a pair of adjacent vanes and the inner wall of the body through the supply portion of the casing, and discharged through the discharge portion, the rising side of the accommodation space. An air passage having a lower end facing the connecting part between the supply part and the body part of the casing is provided, and when the storage space rises and communicates with the supply part, the powder stored in the storage space It is characterized in that the air was replaced with the body is exhausted through the air passage.

Further, according to the present invention, a casing including a body portion, a supply portion and a discharge portion connected to the body portion, and a rotor rotatably supported while a peripheral surface of the casing is in sliding contact with an inner wall of the body portion. The main body is composed of a rotor in which a pocket is formed, and by rotating the rotor, the powder or granular material contained in the hopper connected to the upper part of the supply part of the casing is passed through the supply part of the casing to form the pocket. In a rotary feeder which is housed in a housing space formed by an inner wall of a body and is discharged through a discharge unit, air whose lower end faces the connecting portion of the casing supply unit and the body on the rising side of the housing space. A passage is provided, and when the storage space rises and communicates with the supply unit, the air replaced with the powder or granular material stored in the storage space is exhausted through the air passage. It is.

[0008]

When the rotary feeder operates and the housing space rises and communicates with the supply unit, the air replaced with the powder particles is stored in the housing space, and the supply unit and the body of the casing on the rising side of the housing space. The air is exhausted through an air passage whose lower end opens toward the connecting portion with.

As a result, it is possible to prevent the air in the storage space from being blown up to the lower part of the hopper and pushing up the powder particles to be disturbed, so that the powder particles can be smoothly supplied to the storage space and the rotor rotates. It is possible to reliably supply a fixed amount without reducing the speed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

For the sake of convenience of explanation, the same members as those of the conventional example shown in FIG. 5 are designated by the same reference numerals, and detailed description thereof will be omitted to avoid duplication.

FIG. 1 shows a rotary feeder 1 according to a first embodiment of the present invention. The rotary feeder 1 has a discharge port 4a along a peripheral wall of a hopper 4.
An air passage 6 extending up to is provided. The air passage 6 is formed by a partition wall 61 fixed inside the hopper 4 and a peripheral wall of the hopper 4, the upper end opening of which is open to the atmosphere through an air pipe 8, while the lower end of the partition wall 61 has a guide described later. It is connected to the collar 72 of 7. Further, a guide 7 is attached to a connecting portion between the hopper 4 and the supply portion 22 of the casing 2, and the guide 7 is provided at the upper end opening 2 of the supply portion 22 of the casing 2.
A disk 71 having an opening matching 2a, and the disk 7
1 to be welded to or bent to supply section 22
It is composed of a brim 72 that hangs near the lower end of
The flange 72 and the peripheral wall of the supply portion 22 form a passage 7A continuous with the air passage 6 described above. The lower end opening of the passage 7A faces the connecting portion between the supply portion 22 and the body portion 21 on the rising side of the accommodation space S.

Therefore, after the storage space S rotates downward to discharge the granular material, the storage space S rotates upward and the storage space S communicates with the supply unit 22, thereby passing through the hopper 4 and the supply unit 22. When the granular material is supplied to the accommodation space S, the compressed air in the accommodation space S, which has been replaced with the granular material, passes through the passage 7A,
The air is exhausted through the air passage 6 and the air pipe 8. Therefore, the compressed air in the accommodation space S blows up into the hopper 4 and pushes up the granular material so that it is not disturbed.
The powder particles are smoothly supplied to the accommodation space S and can be reliably supplied in a fixed amount without lowering the rotation speed of the rotor 3.

If the air passage 6 is formed so that its cross-sectional area increases as it goes upward, it is possible to prevent the powder or granules partially lifted by the compressed air from being discharged to the outside. The powder particles attached to the inner wall of the air passage 6 can be naturally dropped and collected.

Next, a second embodiment of the rotary feeder 1 of the present invention will be described with reference to FIG. 2. In this rotary feeder 1, the peripheral surface of the casing 2 of the casing 2 is slidable and rotatable. A rotor 3A having a rotor body 31A pivotally supported on the rotor 3A is adopted, and a pocket 33 is formed in the rotor body 31A. Then, by rotating the rotor 3A, the powder or granular material in the hopper 4 is stored in the pocket 33 of the rotor body 31A.
It is accommodated in the accommodation space S formed by the inner wall of the body portion 21 and discharged. In addition, hopper 4
An air passage 6 is provided in the. This air passage 6
Is fixed inside the hopper 4 and extends from the discharge port 4a of the hopper 4 to the vicinity of the lower end of the supply unit 22 of the casing 2 and the peripheral wall of the hopper 4 and the peripheral wall of the supply unit 22 in the casing 2. The lower end opening is formed and faces the connecting portion between the supply portion 22 and the body portion 21 on the rising side of the accommodation space S.

Therefore, also in this embodiment, when the storage space S is rotated downward to discharge the granular material and then rotated upward to communicate with the supply unit 22, the storage space S passes through the hopper 4 and the supply unit 22. The powder and granules are supplied to the storage space S, and at this time, the compressed air in the storage space S, which has been replaced with the powder and granules, is exhausted through the air passage 6 and the air pipe 8, and the hopper 4
Blow up inside is prevented. As a result, the powder or granules in the hopper 4 are smoothly supplied to the storage space S,
The fixed amount can be reliably supplied without lowering the rotation speed of the rotor 3.

In these embodiments, the rotary feeder 1 is connected to the air transportation pipe 5 for pneumatic transportation. However, instead of the air transportation pipe 5, the rotary feeder 1 is transported to a receiving facility via a conveyor or the like. It can also be applied when

Further, the air passage 6 of these embodiments is constituted by the peripheral wall of the hopper 4 and the partition wall 61, but as shown in FIG. 3, the air passage 6 is constituted by the tube body 62 arranged in the hopper 4. Alternatively, in this case as well, the lower end opening of the tubular body 62 may be exposed to the connecting portion between the supply portion 22 and the body portion 21 on the rising side of the accommodation space S. Furthermore, the tubular body 62
When arranging the inside of the hopper 4, by vibrating the tube body 62, the powder particles adhering to the inner wall of the hopper 4 and the inside and outside surfaces of the tube body 62 can be forcibly dropped. At this time, it is possible to prevent the bridge phenomenon from occurring at the lower part of the hopper 4.

Further, as shown in FIG. 4, it is possible to dispose the pipe body 62 outside the hopper 4. In this case, the pipe body 62 is guided to the inside of the hopper 4 and extended downward. The lower end opening may be exposed to the connecting portion between the supply portion 22 and the body portion 21 on the rising side of the accommodation space S. Similarly, the tube 62
In the case of arranging the outside of the hopper 4, a partition plate (not shown) whose upper end is closed and whose lower end is opened is provided from the lower part inside the hopper 4 to the vicinity of the lower end of the supply part 22 of the casing 2. The lower end opening of the pipe body 62 may be connected to the passage formed by the peripheral wall of the lower portion of the hopper 4 and the peripheral wall of the supply unit 22.

A blower (not shown) may be connected to the above-mentioned air pipe 8 to positively suck the air in the accommodation space S. In this case, a part of the granules is also sucked together, so it is necessary to arrange a cyclone or the like in front of the blower to capture the sucked granules and collect them in the hopper 4.

[0021]

As described above, according to the rotary feeder of the present invention, by providing the air passage having the lower end opening facing the connecting portion of the casing supply portion and the body portion on the rising side of the accommodation space, When the storage space rises and communicates with the supply unit, the air in the storage space, which is replaced with the powder or granules, is exhausted through the air passage, so that the air in the storage space blows up into the hopper. It is possible to prevent the granular material from being pushed up and disturbed, so that the granular material can be smoothly supplied to the accommodation space, and the fixed amount can be reliably supplied without lowering the rotation speed of the rotor.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a rotary feeder of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the rotary feeder of the present invention.

FIG. 3 is a sectional view showing a modification of the rotary feeder of FIG.

FIG. 4 is a sectional view showing another modification of the rotary feeder of FIG.

FIG. 5 is a sectional view showing a conventional rotary feeder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotary feeder 2 casing 21 body part 22 supply part 23 discharge part 3,3A rotor 31,31A rotor body 32 vane 33 pocket 4 hopper 6 air passage 61 partition wall 62 tube body S accommodation space

Claims (2)

[Claims] 1. A casing comprising a barrel portion, a supply portion and a discharge portion connected to the barrel portion, a rotor body rotatably supported by the barrel portion of the casing, and radially fixed to the rotor body. The rotor is composed of a plurality of vanes, the tip of which can slidably contact the inner wall of the body, and by rotating the rotor, the powder and granules stored in the hopper connected to the upper part of the casing supply part In the rotary feeder that is housed in the housing space formed by the pair of adjacent vanes and the inner wall of the body through the supply part of the above, and is discharged through the discharge part, the supply part and the body part of the casing on the rising side of the storage space. An air passage with a lower end opening facing the connecting part with
A rotary feeder characterized in that, when the storage space rises and communicates with the supply unit, the air replaced with the powder or granular material stored in the storage space is exhausted through an air passage. 2. A casing comprising a body portion and a supply portion and a discharge portion connected to the body portion, a rotor main body rotatably supported while a peripheral surface is in sliding contact with an inner wall of the body portion of the casing, and a pocket. By rotating the rotor, the powder or granular material contained in the hopper connected to the upper portion of the casing feed portion is passed through the casing feed portion to form the pocket and the inner wall of the body portion. In the rotary feeder housed in the housing space formed by, and discharged through the discharge unit, an air passage having a lower end opening facing the connecting portion of the casing supply portion and the body portion on the rising side of the housing space is provided.
A rotary feeder characterized in that, when the storage space rises and communicates with the supply unit, the air replaced with the powder or granular material stored in the storage space is exhausted through an air passage.