JPH084154Y2 - Vibration sieve clogging prevention device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a clogging prevention device for a vibration sieve.

[0002]

2. Description of the Related Art In a vibrating screen, the sieving of a material is performed by applying a predetermined acceleration number to the screen and projecting the material onto the screen to make a leap and move the material into the lower part of the screen. The material is separated into different particle groups by passing through the mesh.

When the material to be sieved has a high water content and contains fine particles and the mesh of the sieve is relatively small, the material is subjected to the sieving operation and the adhesive force with the water acts on the material. As a result, the adhesion between the particles and between the particles and the sieving net is promoted, which may cause clogging, reduce the separation performance, and hinder the smooth operation of the vibrating screen. For this reason, the vibrating screen may be equipped with an anti-clogging device.

Conventionally, as a device for preventing clogging of a vibrating screen, a sieve screen which is tightly adhered during operation of the vibrating screen is loosened, and particles adhering to the screen are dropped by utilizing the vibration of the vibrating screen. To prevent clogging (Japanese Patent Publication No. 60-13757). As a clogging prevention device for this type of vibrating screen, a screen is attached at both mounting parts in the longitudinal direction of the screen, and one end of the screen mounting part is connected to a pressure cylinder etc. to improve the performance of the screening operation. When the pressure drops, the pressure cylinder is actuated to loosen the sieving net, that is, the sieving net is tightly attached and loosened by intermittently operating the pressure cylinder.

[0005]

However, the above-mentioned conventional structure is effective in that particles adhering to the sieving net are dropped during the operation of the vibrating screen to prevent clogging. Occurrence of clogging cannot be prevented in advance, and coarse particles may be mixed with a predetermined under-sieve product due to dropping of particles due to relaxation of the sieve mesh after clogging occurs, which is not preferable. The present invention has been made to solve the above-mentioned problems, and the purpose thereof is to continuously generate a secondary vibration in the sieve mesh during the operation of the vibrating sieve, so that the mesh due to the adhesion of the material An object of the present invention is to provide a clogging preventive device for a vibration sieve that can effectively prevent clogging in advance.

[0006]

In order to achieve such an object, in the present invention, in the width direction of the sieve frame of the vibrating sieve,
A flat elastic plate is placed below the sieving net, and a vibrator for resonating with the elastic plate is attached to the lower part of the elastic plate. Is provided, and the sieving net is secondarily vibrated by the excitation of the vibration exciter.

[0007]

By doing so, during the operation of the vibrating screen, secondary vibrations are constantly and continuously generated in the screen, and the vibrating force is transmitted to the material particles stronger than the adhesive force. Adhesion is significantly reduced, and clogging can be effectively prevented in advance.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is an overall configuration diagram showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of an essential part taken along line AA of FIG. 1, and FIG. 3 is an enlarged sectional view of an essential part taken along line BB of FIG. Figure,
FIG. 4 is an enlarged cross-sectional view of an essential part of another embodiment of the present invention, in which members common to those shown in FIG. 3 are designated by the same reference numerals.

1 to 3, in the sieve frame 12 of the vibrating sieve 10, sieve nets 13 and 13 'are arranged in the longitudinal direction, and the sieve nets 14 and 14' and the sieve net 15 are arranged.
It is arranged in multiple stages as shown in. Sieving net 13,
Both ends of 14 and one ends of sieving nets 13 ′, 14 ′, 15 are attached to the sieving frame 12, respectively.
It is attached to 7. Also, sieve screens 13 ', 14', 15
The other end of each of these is attached to another attachment 18 provided on the sieving frame 12. Thus sieve screen 13,1
3 ', 14, 14' and 15 are all tightly attached to the sieving frame 12.

Reference numeral 30 is a supply port for the material to be sieved, and this material is supplied onto the sieving net 13 through the chute 31. The chutes 32, 32 ', 32 "are provided so as to guide the discharge of the products on the respective screens of the sieving nets 13', 14 ', 15. Reference numeral 33 indicates the discharge port of the under-sieving products. Oscillators 16 are attached to both side frames of the frame 12, and the sieving frame 12 is elastically supported by support bases 34, 34 via elastic members 35, 35.

On both sides of the sieving frame 12, a sieving net 13,
Openings 12a, 12a are provided below 13 ', and a flat plate-shaped or strip-shaped elastic plate 20 is arranged in the width direction of the sieving frame 12. Both ends of the elastic plate 20 are sandwiched between seat plates 24, 24 on a support base 23 provided on the sieving frame 12 and securely fastened by using fastening means 25 or the like. The openings 12a, 12a are sealed by the elastic sealing material 22, 22 so that both ends of the elastic plate 20 are penetrated.

Below the elastic plate 20, a vibrating machine 21 for exciting an unbalanced force, such as a vibration motor, is provided.
6 is used, and the vibration exciter 21 has a sieve net 13,1.
It is located approximately in the center of the width 3 '. At the upper part of the elastic plate 20, a flexible receiving member 19 is provided between the elastic plate 20 and the sieve nets 13 and 13 '.
Are attached using the tightening means 26a. Flexible receiving material 1
9 is formed by being divided into a plurality of pieces in the width direction of the sieving frame 12, and is made of a hollow semicircular member having a bottom surface 19b. The top portion 19a of the flexible receiving member 19 is in contact with the sieving nets 13 and 13 ', and the bottom surface 19b is located on the upper surface of the elastic plate 20.

By vibrating the vibration exciter 21 in this manner, the elastic plate 20 resonates to generate bending vibration, and each flexible receiving member 19 is then moved, so that the sieving net 13, 13 'is adapted to receive a planar secondary vibration in the longitudinal direction and the width direction.

Next, the operation will be described. The vibrating screen 12 is operated by driving the oscillator 16, and the material having adhesiveness is supplied from the supply port 30 to vibrate the screen 1.
Sieving is performed while jumping over 3, 13 'and moving sequentially while exercising, and the products on the sieve of the sieve nets 13 and 13' are discharged from the chute 32, and the products under the sieve are sieve nets 14, The sieving is performed by 14 ', the sifted product is discharged from the chute 32', the sifted product is partly screened directly, and the rest is sifted by the sieving net 15, and then discharged from the open end 33. To be done.

The sieving nets 13 and 13 'are generated continuously by the vibration of the vibrating machine 21 by superimposing the above-mentioned vibration on the flat secondary vibration.
Therefore, the vibrating force is transmitted to the material particles moving on the sieving nets 13 and 13 'more strongly than the adhesive force, so that the adhesion of the material to the sieving nets 13 and 13' can be significantly reduced, and The occurrence of clogging can be effectively prevented in advance. The operation of the vibrating screen 10 can be continuously continued, and the sieving ability can be improved. Further, since the sieving nets 13 and 13 'are not tightly attached and loosened, the openings are surely maintained, so that it is possible to prevent the deterioration of the sieving performance.

In FIG. 4, the flexible receiving member 19 'is made of, for example, rubber or the like and is integrally formed in the width direction of the sieving frame 12, and has a fastening means (not shown) on the upper surface of the elastic plate 20. Installed. 36 is a flexible receiving member 1
It is used as a fastening means 26 for fixing the vibrating machine 21 to the elastic plate 20 by showing the space 9 '. As a result, the integrated flexible receiving member 19 'is moved by the vibration of the vibration exciter 21, so that the sieving nets 13 and 13' receive the planar secondary vibration.

[0017]

[Effects of the Invention] As described above, according to the present invention, the secondary vibration is continuously generated in the sieving net continuously during the operation of the vibrating screen, and the vibration force is transmitted to the material particles stronger than the adhesive force. Therefore, the adhesion of the material is significantly reduced, and the occurrence of clogging can be effectively prevented in advance.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part taken along the line AA of FIG.

3 is an enlarged cross-sectional view of a main part taken along the line BB of FIG.

FIG. 4 is an enlarged sectional view of an essential part showing another embodiment of the present invention.

[Explanation of symbols]

 10 Vibration Sieve 12 Sieve Frame 13, 13 'Sieve Net 19 Flexible Receiving Material 20 Elastic Plate 21 Vibrator

Claims (3)

[Scope of utility model registration request] In 1. A width direction of the sieve frame vibration sieve, with arranged a plate-shaped elastic plate, a lower portion of the elastic plate mounting the vibrator for resonating the elastic plate beneath the sieve screen, A device for preventing clogging of a vibrating screen, characterized in that a flexible receiving member that comes into contact with the screen is provided on the elastic plate, and the screen is secondarily vibrated by the excitation of the vibrating machine. 2. The clogging prevention device for a vibrating screen according to claim 1, wherein the flexible receiving member is formed by being divided into a plurality in the width direction of the screen. 3. The clogging prevention device for a vibration sieve according to claim 1, wherein the flexible receiving member is integrally formed in the width direction of the sieving frame.