JPH0815587B2 - Vibrating sieve - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a round vibrating screen having a function of cooling or drying with conditioned air.

[0002]

2. Description of the Related Art When manufacturing processed foods made from powdered cereals as raw materials, the products that have been heat-processed are sieved to remove the fine powder, etc., but the surface of the product after heat-processing is starchy. Since the products have stickiness due to such factors, the products tend to stick to each other, and the products after heat processing cannot be passed through a sieving machine as they are.

Therefore, the product after heating is placed on a vibrating feeder, and conditioned air is blown in the vibrating feeder to cool or dry the product. After that, the product whose surface has been detackified by cooling or drying is passed through a vibrating screener to remove fine powder.

FIG. 5 shows a conventional cooling vibration feeder in which a trough 48 is long in one direction (left and right in the drawing), and a product put in from an input port 41 drops onto an air deck 42.

The air deck 42 is a flat plate having a punching hole having a diameter smaller than that of the product, and the product dropped on the air deck 42 is reciprocally oscillated in the direction of arrow P-P 'by the vibration motor 44.
Can be moved in the direction of.

The legs 49, 49 for supporting the trough 48 are provided with compression coil springs 49a, 49a at their intermediate portions to absorb the vibration generated by the vibration motor 44 provided in the trough 48.

The product is cooled by cooling air supplied from air supply ports 45, 45 provided on one side of the trough 48. The cooling air enters the air chamber 46 below the air deck and is opened in the air deck. The product on the air deck 42 is cooled through the punching holes. The air that has flowed from the air chamber 46 onto the air deck 42 to cool the product is discharged from the exhaust ports 47, 47 formed in the upper surface of the trough 48.

This cooling vibrating feeder can be used as a vibrating feeder for drying if it is operated by changing the cooling air to high temperature air.

[0009]

Conventionally, when the fine powder is removed by sieving the product, the linear vibration feeder described above is used to cool or dry the product. However, the product is sufficiently cooled or dried. In order to do so, it is necessary to increase the linear length of the air deck to increase the moving distance of the product, or to decrease the vibration generated by the vibration motor to increase the moving time of the product. In the former case, the size of the apparatus is increased, and in the latter case, the cooling or drying capacity per unit time is reduced.

Further, both of them must be cooled and dried by a vibrating feeder, and the sorting must be done by another vibrating sieve, which requires double equipment cost.

[0011]

In order to solve such a problem, a vibrating sieve according to the present invention has a cylindrical sieve main body with a lid and a bottom provided with a vibrating device at a lower portion, and The air-conditioning room, the sieving room, and the fine powder collection room are equipped with a screen consisting of an air deck
The chamber is divided into chambers, and an air chamber is provided between the lid of the sieve body and the air-conditioning chamber by a partition plate consisting of a vent plate, and the center of the lid has a lower end that faces the center of the air deck. In addition to the above, a regulated air supply pipe with a blowout port opening into the air chamber is provided at an appropriate position of the lid, and a fin that is spirally wound from the central portion to the outer periphery is provided on the air deck. It has a structure in which a spiral track is formed.

[0012]

The vibrating device generates a three-dimensional vibration by driving the motor, and the product in the sieve main body which receives the three-dimensional vibration is moved outward from the center of the main body.

Further, since the trough on the air deck is formed in a spiral shape, the product travels a long distance and is small in size, but the product is sufficiently cooled and dried. Further, since only one vibration feeder and a vibration motor that is a vibration source of the vibration sieve are required, the facility cost can be significantly reduced.

[0014]

EXAMPLES Specific examples of the vibrating screen of the present invention are shown in FIGS.
6 will be described in detail. The present invention is a sieve body,
The vibration device vibrates this. Sieve body 1
Is a circular upper middle frame 1a including a lid 3 and an air deck 4.
And a circular lower middle frame 1b provided with a screen 5 such as a wire mesh
And a circular bottom frame 1c having a bottom plate 6, each of which is in the form of a cylindrical container with a closed bottom connected and fixed by frame stop bands 2a, 2b, 2c.

Inside the main body 1, an air-conditioning room A for cooling or drying by blowing regulated air to the product in order from above by screens such as the above-mentioned air deck 4 and wire mesh 5, for sieving fine powder from the product It is divided into a sieving chamber B and a fine powder collecting chamber C for collecting and discharging the fine powder sieved from the product.

On a part of the outer surface of the lower middle frame 1b, the wire mesh 5
Product outlet 7 for discharging the product from which fine powder has been removed above
And a bottom plate 6 is provided on a part of the outer surface of the bottom frame 1c.
A fine powder discharge port 8 for discharging the fine powder that has been sieved off is provided.

A downward tapered taper inlet 13 is provided at the center of the lid 3 of the main body so that the product which has been subjected to the heating process is supplied to the upper center of the air deck 4 of the air conditioning room A.

The structure of the air deck 4 is unique as shown in FIG. 2, and a large number of punching holes 14 for ventilation are provided on the entire surface so that the adjusted air is punched.
In addition to passing through, the fine powder from the product is sieved down.

A spiral fin 15 having a spiral shape in a plan view is erected on the air deck 4, and the lower end 1 of the charging port 1 is provided.
The product dropped from 3a to the center of the air deck 4 is
A track 16 is formed which serves as a guide to be guided outward by dimensional vibration.

The air deck 4 and the fins 15 are
It is made of a metal having a high heat dissipation effect such as aluminum or stainless steel, which improves the efficiency of heat exchange between the conditioned air and the product so that the product can be cooled or dried efficiently.

A chute hole 17 is formed at the outermost end of the track 16 and the chute hole 17 is formed below the chute hole 17 and the outer end is the upper middle frame 1.
a It is attached to the inner wall surface and the other end (inner end) is a sieving chamber B
A downwardly inclined chute plate 18 is provided at the center of the wire mesh 5 of FIG.

An air chamber 21 is provided by a partition plate 20 between the lid 3 of the sieve main body and the air-conditioning room A. The partition plate 20 has punching holes 22 formed in a cross-radial shape as shown in FIG. There is an air chamber 2 from the air supply port 19
The adjusted air that has entered the inside of 1 is supplied to the air conditioning room A through the punching holes 22.

A three-dimensional vibrating device for generating a moving force on the air deck 4 and the wire net 5 in the outer peripheral direction and for selecting fine powder on the wire net 5 has the following structure. .

The vibrating device is such that a vibrating plate 10 whose periphery is supported by a proper number of compression coil springs 12 is provided above a tubular frame 11, and the vibrating plate 10 is sieved around the vibrating plate 10. The lower part of the main body, that is, the bottom frame 1
The lower part of c is fixed by a frame fixing band 2d.

Further, in the central hole of the diaphragm, the rotary shaft 23
The vibration motor 9 having a vertical axis is fixed by fixing the upper flange 26 to the flange 10a in the center hole of the vibration plate, and by appropriately fixing the upper end of the stay 10b attached to the lower flange 27 of the motor to the lower surface of the vibration plate. There is.

However, unbalance weights 24 and 25 are fixedly fitted to the upper and lower projecting ends of the rotary shaft 23 of the motor, respectively. The phase difference between the upper weight 24 and the lower weight 25 is set to 0 ° to 35 °. In this phase difference setting range, the products on the air deck 4 and the wire mesh 5 are generated by the deviation of the center of gravity of the upper and lower weights. Do 3
It receives dimensional vibration and is moved from the center to the outer circumference.

At this time, if the phase difference between the weights is set to a value exceeding 35 °, the products on the air deck and the wire mesh are given a moving force from the outer circumference toward the center. FIG.
Reference numeral 28 indicates an apron, which protects the vibration motor 9 from dust and the like together with the cylindrical inner frame 29 provided on the upper portion of the base 11.

In the present apparatus of the above-described embodiment, the diaphragm is vibrated three-dimensionally by driving the motor, and the sieve body is vibrated three-dimensionally by this. Therefore,
The product supplied from the inlet 13 into the air conditioning room A of the main body is
The vibration causes the product to move outward from the center on the track 16, while the product is cooled or dried by the conditioned air in the partition plate punching holes 22.

At this time, since the punching holes 22 are formed in a radial pattern, even if the adjusted air blown out from the punching holes 22 is a continuous wind, it becomes an intermittent wind for the product moving spirally on the track 16, For example, when the product is cooled, the heat inside the product is efficiently released to the outside, so that the cooling effect is improved and the wind-up of fine powder due to wind pressure is minimized.

Next, the product is guided to the chute plate 18 through the chute hole 17 formed at the outermost peripheral end of the truck 16 and drops to the center of the wire net 5 in the sieving chamber B.

The product in the sieving chamber B moves outward by three-dimensional vibration while sieving the fine powder into the fine powder collecting chamber C below the wire net, and is discharged from the product outlet 7.

At this time, the adjusted air blown from the air-conditioning room A to the sieving room B through the punching holes 14 formed in the air deck 4 is again blown to the product moving on the wire net 5 to cool or dry the product. The efficiency is further improved.

The fine powder removed in the fine powder collecting chamber C is
It is collected on the bottom plate 6 and blown out from the fine powder discharge port 8 together with the adjusted air which has finished cooling or drying the product in the air conditioning chamber A and the sieving chamber B.

[0034]

As described above, according to the vibrating screen of the present invention, since it has both the cooling or drying function by the adjusted air and the selecting function, and only one vibration motor as a power source is required,
There is no need to provide a vibration feeder and a vibration sieve separately,
The equipment cost can be kept low.

Further, since the feeder portion for cooling and drying is formed in a spiral shape, it is possible to reduce the size of the main body while maintaining a sufficient length of the trough for cooling and drying processing. This makes it possible to effectively use the processing space.

Further, if a plurality of stages of air decks are provided in the main body, the length of the trough can be increased,
Similarly, by providing a plurality of nets, it is possible to select products in multiple stages.

[Brief description of drawings]

FIG. 1 is a partially longitudinal front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

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

FIG. 4 is a diagram showing a vibration motor.

FIG. 5 is a diagram showing a conventional linear cooling vibration feeder.

[Explanation of symbols]

 1 Main body 1a Upper middle frame 1b Lower middle frame 1c Bottom frame 2a, 2b, 2c, 2d Frame stop band 3 Lid 4 Air deck 5 Wire mesh 6 Bottom plate 7 Product outlet 8 Fine powder discharge port 9 Vibration motor 10 Vibration plate 10a Flange 10b Stay 11 frame Body 12 Coil spring 13 Input port 14 Punching hole 15 Fin 16 Track 17 Chute hole 18 Chute plate 19 Air supply port 20 Partition plate 21 Air chamber 22 Punching hole 23 Shaft 24 Upper weight 25 Lower weight 26 Upper flange 27 Lower flange 28 Apron 29 The inner frame

Claims (1)

[Claims] 1. An air-conditioning chamber having a bottom with a vibrating device at the bottom and a bottomed cylindrical sieve body with an air deck made of a porous ventilation plate and a screen made of a wire mesh etc. provided thereunder,
It is divided into three chambers, a sieving chamber and a fine powder collecting chamber, and an air chamber is provided between the lid of the sieving body and the air-conditioning chamber with a partition plate made of a vent hole plate, and a lower end is provided at the center of the lid. An inlet opening facing the central portion of the air deck is provided, and a regulated air supply pipe with an outlet opening in the air chamber is provided at an appropriate position of the lid, and the air deck is spirally wound from the central portion toward the outer periphery. A vibrating screen formed by forming a spiral track on the deck by providing fins.