JP2843454B2 - Vibrating sieve for fines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a vibrating screen for producing fine granules used in an aggregate production plant or the like.

[0002]

2. Description of the Related Art Fine grain production used in aggregate production plants
Use vibrating sieve, for example, as shown in JP-A-2-152579, is continuously provided on the sieve element in the overall length of each inclined provided in multiple stages different front sieve and rear stages sieve and sieve frame, The sieving element for sifting the fine granules to be a product is disposed in a rear sieving portion having a length smaller than the entire length of the sieving frame. In the final-stage sieving element, all of the particles having a size above the fine-grained particles in the particle size configuration of the material are sieved. In the vibrating sieve, the particles are sieved with a probability of passing the material through a sieve element having a required aperture.

[0003]

In the method of sieving according to the passage probability of the material, a sieve having a required mesh size is used.
Pass through elements (made of wire mesh or rods, etc.)
Sharp sieving of materials due to passage probability
Can not. Also, sieve elements to obtain sufficient probability
It is necessary to increase the number of stages, the structure of the vibration sieve
Due to the above restrictions, the number of sieve elements may be limited.
You. However, if the number of sieving elements is limited, sharp sieving cannot be performed when sieving the material, and the sieving efficiency may be reduced.

[0004] Further, in the final stage sieving element, since all of the particles having the size above the fine particles among the materials are sieved, there are many opportunities for the sieved product to be mixed with the sieved product. It cannot be performed, and it may not be possible to obtain fine granules efficiently, which is not preferable. Further, since the length of the final sieving element is reduced, it is not possible to achieve a sufficient number of collisions when moving the material, and it is impossible to efficiently obtain fine particles as described above. There is not preferred.

Furthermore, in order to obtain fine powder efficiently,
The vibrating sieve is designed to increase the length of the final-stage sieve element and to make the sieve opening approximately the size of the fine-grained particles so that the material can pass through with sufficient number of collisions when moving. Although a structure can be proposed, the length of the vibrating sieve is significantly increased, which not only results in a limitation in structural strength, but also results in a product obtained from the sieve from the former sieve on the final sieve having a narrow opening. Since certain fine particles move and collide with each other, the sieve element may be damaged, which is not preferable.

[0006] The present invention has been made to solve the problems of the prior art described above, miniaturization, resulting reducing the weight, and fine raw capable of producing efficiently granules
It is intended to provide industrial vibrating sieves.

[0007]

In order to achieve the above object, the vibrating sieve according to the present invention for producing fine granules has a sieve element.
The apertures were sequentially reduced and arranged in multiple layers
The former sieve part and the latter sieve part are provided in the sieve frame,
The front sieve part is directed outward at the upper part on one side in the sieve frame.
The front end is inclined downward.
An outlet for the product on the sieve of the sieve is provided.
The sieve should be horizontal and forward over the entire lower length of the sieve frame.
It is formed and connected to the step sieve part in a
Oscillator that generates linear or elliptical vibration at the top of the frame
A mechanism is provided, and a straight line or
The downward inclination angle of the circular vibration is downward of the previous sieve
A horizontal plane that is larger than the angle of inclination and that is the rear sieve part
At an angle of less than 90 ° to the direction of material movement in
Formed below the front sieve,
Incline to supply the bottom product of these sieves to the beginning of the rear sieve
A guide member is provided, and the lowermost sieve of the latter
It is characterized in that the lower part of the element is a fine-grain product discharge part .

[0008]

In the above means, when sieving the material,
Fu with dimensions on sieve fine particles by the preceding stage sieve
The main part of the upper product moves downward and separates quickly.
And thus coarse particles for the most required classification
The remaining particles, excluding the particles, flow into the rear sieve,
Lateral sieve formed horizontally over the entire length of the sieve frame
Sieving is continuously performed by the sieve element of the department,
The product on the sieve is remarkably reduced, sharp sieving can be achieved, and fine granules can be efficiently obtained.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a vibrating sieve showing one embodiment of the present invention, and FIGS. 2A to 2F are explanatory diagrams showing a granularity configuration by sieving each sieve element of the vibrating sieve.

In FIGS. 1 and 2A to 2F, 10
Denotes a vibrating sieve, 11 denotes a front sieve, and 12 denotes a rear sieve. 13 is a sieve frame, in front
The step sieve portion 11 faces the material supply portion 27 of the sieve frame 13.
The front upper sieve that is inclined downwards
The element 14 and the front lower sieve element 15 form a step in the vertical direction.
And the upper sieve section 12 has a rear upper sieve.
Element 19 and rear lower sieving element 20
And the horizontal direction over the entire length of the sieve frame 13
It is arranged in the direction. And, under the former-stage sieve portion 11
The end 11a is associated with the inlet end 17 of the rear sieve section 12.
The rear sieving part 12 is combined with the front sieving part 11.
It is formed so as to take on the shape of a "ku", and
Are disposed so as to be connected to each other in a crossing direction.
The ends of the sieve elements 14, 15, 19, 20 are illustrated
Can be detachably attached to the supporting material using
Have been.

Further, a slanted inclination is provided below the front sieve part 11, that is, below the front lower sieve element 15.
A guide member 16 is provided, and the inlet end 17 is formed between a lower end portion of the inclined guide member 16 and a lower end portion 11a of the front sieve portion 11, and the product below the sieve of the front sieve portion 11 is provided by the inclined guide member. Move the upper surface of No. 16 to the rear sieve 1
2 to be fed to the beginning .

The upper and lower sieving elements 14 and 15 of the first sieving section 11 are arranged at the final sieving classification point.
To be large enough to remove coarse particles in the material.
ing. In addition, the front lower sieve element 15 is used for the final classification point.
It is a corresponding opening, and the front upper sieve element 14 is
The opening is larger than the lower sieve element 15. Immediately
First, the lower sieving element 15 in the first stage of the coarse particles separated from the material classification
To prevent the water from flowing into the
It has an opening to decrease. On the outside of the sieve frame 13 has an elastic member 24 provided on the supporting base 25, further Fu
A slanted reinforcing material is provided at the approximate center of the length of the frame 13.
22 is provided, and a straight line is formed on the upper part of the front sieve frame 13 located on a mounting table (not shown) reinforced by the reinforcing member 22.
Or an oscillation that produces an ellipse (indicated by arrows C and C ')
A mechanism 23 or 23 'is provided.
Downward tilt of straight or elliptical vibration by 23 or 23 '
The angle of inclination is the angle of downward inclination of the front sieve part 11.
In the horizontal plane of the rear sieve part 12
Formed at an angle of less than 90 ° to the direction of material movement
Generated by the operation of the oscillation mechanism 23 or 23 '.
Due to the unbalanced action, the sieve frame 13, ie, each of the sieve elements 14, 15, 19, 20 has a straight line having a high vibration intensity.
Or, an elliptical vibration motion is imparted.

The front discharge section 18 is a lower end of the front screen section 11.
The upper stage and the lower stage sieve elements 14 and 15 are provided near the outlet end of the rear stage sieve 12, respectively. The upper product of each of the upper and lower sieve elements 19, 20 is discharged. The lower end 26 of the sieve frame 13 is open and
Of the lower sieving element 20 at the bottom of the lower sieving part 12
Lower is the discharge portion of the fines product, sieve bottom product from subsequent lower sieve element 20, fine particle manufactured through the hopper 26 '
It is discharged out of the system as a product .

Next, the operation will be described. The vibrating sieve 10 is directly driven by the driving of the oscillating mechanism 23 or 23 ' rotating at a high speed.
A linear or elliptical vibration is applied, and
Angle of downward inclination of circular vibration is as shown by arrow C or C '
Larger than the angle of downward inclination of the front sieve portion 11
Material transfer on the horizontal surface of the rear sieve portion 12
Formed at an angle of less than 90 ° to the direction of movement
Therefore, the front-stage sieve 11 and the rear-stage sieve 12 are straight.
Alternatively, the solid material is supplied from the supply unit 27 according to the elliptical vibration, and the first-stage sieve 11 and the second-stage sieve 1 are supplied from the first-stage sieve 11.
As shown by an arrow A to an arrow B, the material is sequentially moved to 2 and the sieving is performed with the direction change of the material movement. Since front sieve unit 11 is inclined downward, the material is rapidly screened under fast moving speed, separating the front upper material in the sieve elements 14 from the product O ₁₄ on a sieve and the sieve under product U ₁₄ is, further the sieve bottom product _{U 14} sieving in front lower sieve element 15, is separated into a sieve under product _{U 15} and product _{O 15} on a sieve, the sieve on product _{O 14, O 15} is front sieve unit Pre-stage discharge unit 18 as ₁₁ sieved product O ₁₁
Is discharged from Further, in the vibrating sieve 10, the material
Required for processing per unit volume (for example, 1 t / h)
The area of the sieve is inversely proportional to the aperture size of the sieve element.
It is in. Therefore, the front upper sieve element 14 and the front
The sieving ability of the material of the lower sieving element 15 is lower
More ability than the sieving ability of the part sieve element 20
So that the latter lower sieve element 20 is required
It is smaller than the sieve area.

[0015] Then, minus sieve product U ₁₅ is rapidly moved in the arrow A direction while sliding on the inclined guide portion <br/> member 16, or the direction converted by the horizontal plane to the direction of arrow B through the inlet end 17
Is moved to the subsequent sieving part 12, and
Sieving with sufficient residence time ,
In the rear upper sieving element 19, the lower sieving product O ₁₅
Is separated into a top product O ₁₉ and a bottom product U _19, and further, in the lower lower sieving element 20, the bottom product U ₁₉ is sieved to form a top product O _19.
20 and is separated into a sieve under product _20, the sieve on product _{O 19, O 20} sieve bottom product _{O 20} while being discharged from the later stage discharge portion 21 as a sieving on product _{O 12} of the subsequent stage sieve 12 at the lower end 26 From the opening through the hopper 26 'as fine products .

In this manner, the lower-stage lower sieving element 20
Because it is reduced the mass of the material particles having a size on the particle diameter or corresponding to classification point of the particles greatly in thickness suitable material layers Upon sieving, the movement by active onset material flight in the original, yet by increasing the residence time
Since the sieving is optimally operated, sharp sieving can be achieved and fine-grained products can be efficiently produced . 2 (a) to 2 (f), the process from the sieving of the material to the obtaining of a fine-grained product is shown by a particle size distribution curve, and the hatched portions in FIGS. 2 (a) to 2 (d) indicate each sieving element. 1
4, 15, 19, and 20 represent particles supplied to
The shaded portions in (e) and (f) represent the particle groups of the fine-grained product, respectively.

[0017]

As described above, according to the present invention,
Optimal with sufficient residence time to the particles of the balance by the rear stage sieve by quickly separating the main portion of the particles having a size on sieve fine particles by front sieve unit, which is downwardly inclined when the material sieving Sieving under operating conditions can achieve sharp sieving and separation is difficult
Fine grain products can be produced efficiently. In addition, the size of the vibrating sieve can be reduced in size and weight, and the processing capability can be improved.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a vibrating sieve for producing fine grains, showing one embodiment of the present invention.

2 (a) to 2 (f) are explanatory diagrams showing a particle size distribution curve by sieving each of the sieve elements of the vibrating sieve.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Vibration sieve 11 Front sieve part 12 Rear sieve part 13 Sieve frame 16 Incline guide member 18 Front discharge part 21 Rear discharge part 23 Oscillation mechanism

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Toshihide Kamase 1780, Kamitakano, Yachiyo-shi, Chiba Prefecture Inside the Yachiyo Plant of Kawasaki Heavy Industries, Ltd. (72) Inventor Makoto Hirakawa 1780, Kamitakano, Yachiyo-shi, Chiba Industrial Kawasaki (56) References JP-A-55-99366 (JP, A) JP-A-63-164981 (JP, U) JP-B-55-36397 (JP, B2) JP-B-55-4045 (JP, A) , B2) Jiko 63-33665 (JP, Y2)

Claims (1)

(57) [Claims] 1. A sieve element sequentially reduces apertures.
The front and rear sieves arranged in multiple stages
Part is provided in a sieve frame, and the former sieve part is a sieve.
At the top of one side inside the frame, it is inclined downward outward
At the inclined end of the sieve from the former sieve.
An outlet is provided, and the rear sieve is a lower part of the sieve frame.
Horizontally over the entire length and in the shape of a "ku" with the front sieve
Formed and connected, and a straight line or
An oscillation mechanism for generating an elliptical vibration is provided,
Angle of downward inclination of linear or elliptical vibration by oscillation mechanism
Is larger than the downward inclination angle of the front sieve, and
In the direction of material movement in the horizontal plane of the
The pre-stage sieve is formed at an angle of less than 90 °.
In the lower part of the section, the sieved product from the former
An inclined guide member is provided at a starting end of the cutting portion, and is provided at a subsequent stage.
Below the sieve element at the bottom of the sieve section is the fine-grain product discharge section.
Vibrating sieve for fine grain production
No.