JPH0544265U - Vibration sieve clogging prevention device - Google Patents

Abstract

(57) [Summary] [Purpose] By continuously generating secondary vibrations in the sieve mesh during the operation of the vibrating sieve, it is possible to effectively prevent clogging due to material adhesion in advance. It is intended to provide a "sieve clogging prevention device". [Structure] A flat elastic plate is arranged below the sieve mesh in the width direction of the sieving frame of the vibrating screen, and a vibration exciter for resonating with the elastic plate is attached to the lower part of the elastic material. A flexible receiving material that comes into contact with the sieving net is provided on the upper part of the
The sieving net is secondarily vibrated by the excitation of the vibration exciter.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a clogging prevention device for a vibration sieve clogging prevention device.

[0002]

[Prior Art]

 In a vibrating screen, the material is sieved by applying a predetermined acceleration number to the screen and letting the material pass through the lower part of the screen contained in the material during the process of projecting the material on the screen and jumping. This separates the material into different particle groups.

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 has a high adhesive force with respect to the water during the sieving operation. It acts to promote the adhesion between the particles and between the particles and the sieving net, 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 a clogging prevention device.

Conventionally, as a device for preventing clogging of a vibrating screen, a sieve screen that has been tightly adhered during operation of the vibrating screen is loosened, and particles adhering to the screen are dropped by using 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 sieve screen is attached to both ends of the screen in the longitudinal direction, and a pressure cylinder is connected to one end of the attaching part of the sieve screen to perform a screening operation. When the performance deteriorates, the pressure cylinder is activated and the sieve mesh is loosened, that is, the sieve mesh is tightly attached and loosened by intermittently operating the pressure cylinder.

[0005]

[Problems to be Solved by the Invention] However, the above-mentioned conventional configuration is effective in that particles adhering to the sieving net are dropped during the operation of the vibrating sieve to prevent clogging, but Occurrence of clogging cannot be prevented in advance, and coarse particles may be mixed with the product under the predetermined sieving due to the drop of particles due to the relaxation of the sieve net after clogging. Absent. The present invention has been made to solve the above-mentioned problems, and the purpose thereof is to continuously generate secondary vibrations in the sieve mesh during the operation of the vibrating sieve, so that the deposition of the material may be caused. It is an object of the present invention to provide a clogging prevention device for a vibrating screen that can effectively prevent clogging in advance.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, in the present invention, a flat elastic plate is arranged below the sieving mesh in the width direction of the sieving frame of the vibrating screen, and the elastic plate is resonated with the elastic plate under the elastic plate. In addition to mounting the vibrating machine, the elastic plate is provided with a flexible receiving member in contact with the sieving net, and the sieving net is secondarily vibrated by the excitation of the vibrating machine.

[0007]

[Action]

 In this way, during the operation of the vibrating screen, secondary vibration is constantly and continuously generated in the sieve mesh, and the vibrating force is transmitted to the material particles stronger than the adhesive force. It is reduced, and moreover, clogging can be effectively prevented in advance.

[0008]

【Example】

 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 cross-sectional view of a main part taken along the line AA of FIG. 1, and FIG. 3 is a main part taken along the line BB of FIG. FIG. 4 is an enlarged cross-sectional view showing an enlarged cross-sectional view of an essential part of another embodiment of the present invention, and the same members as those shown in FIG. 3 are designated by the same reference numerals.

In FIGS. 1 to 3, sieving nets 13, 13 ′ are arranged in a longitudinal direction on a sieving frame 12 of a vibrating sieving machine 10. Further, as shown by sieving nets 14, 14 ′ and a sieving net 15, there are multiple stages. It is arranged. Both ends of the sieving nets 13 and 14 and one ends of the sieving nets 13 ′, 14 ′ and 15 are attached to fittings 17 provided on the sieving frame 12, respectively. The other ends of the sieving nets 13 ′, 14 ′, 15 are attached to other attachments 18 provided on the sieving frame 12, respectively. Thus, the sieving nets 13, 13 ', 14, 14', 15 are all tightly attached to the sieving frame 12.

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

On both sides of the sieving frame 12, openings 12 a, 12 a are provided below the sieving nets 13, 13 ′, and a flat plate-shaped or band-shaped elastic plate 20 is arranged in the width direction of the sieving frame 12. There is. Both ends of the elastic plate 20 are sandwiched between the seat plates 24, 24 on the 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 materials 22, 22 so that both ends of the elastic plate 20 are penetrated.

A vibrating machine 21 for exciting an unbalanced force, for example, a vibrating motor or the like is attached to the lower part of the elastic plate 20 by using a tightening means 26. The vibrating machine 21 has a sieve net 13, 13 ′. It is located almost in the center of the width direction. The flexible receiving member 19 is attached to the upper part of the elastic plate 20 between the sieve nets 13 and 13 'by using the tightening means 26a. The flexible receiving member 19 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 way, the elastic plate 20 resonates to generate bending vibration, and then each of the flexible receiving members 19 is moved, so that the sieve mesh 13, 13 'are 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 adhesive material is supplied from the supply port 30 and jumps over the vibrating screen 13 or 13 'to move sequentially. Finally, sieving is carried out, the products on the screen of the sieving nets 13 and 13 'are discharged from the chute 32, the products under the sieving are screened by the sieving nets 14 and 14', and the products on the sieving are from the chute 32 '. At the same time as being discharged, the sieved product is partially screened directly and the rest is screened with a sieving net 15, and then discharged from the open end 33.

Then, due to the excitation of the vibration exciter 21, the sieving nets 13 and 13 ′ are constantly and continuously generated by superimposing the above-mentioned vibration and the planar secondary vibration. Therefore, the vibration force is transmitted to the material particles moving on the sieving nets 13 and 13 'stronger than the adhesive force, so that the adhesion of the material to the sieving nets 13 and 13' can be significantly reduced. Therefore, the clogging of the material can be effectively prevented in advance. The operation of the vibrating screen 10 can be continued continuously, and the screening capacity 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 a fastening means (not shown) is provided on the upper surface of the elastic plate 20. It is installed by using. Reference numeral 36 designates a space portion of the flexible receiving member 19 ′ and is used as a fastening means 26 for attaching the vibrator 21 to the elastic plate 20. As a result, the integrated flexible receiving member 19 'is moved by the vibration of the vibrator 21, so that the sieve nets 13 and 13' are subjected to the planar secondary vibration.

[0017]

[Effect of the device]

 As described above, according to the present invention, during the operation of the vibrating sieve, the secondary vibration is constantly and continuously generated in the sieve mesh, and the vibrating force is transmitted to the material particles stronger than the adhesive force. It is possible to significantly reduce the adhesion of dust and prevent clogging from occurring effectively 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 Exciter

Claims (3)

[Scope of utility model registration request] 1. A flat elastic plate is arranged below the sieve mesh in the width direction of the sieving frame of the vibrating screen, and a vibrator for resonating with the elastic plate is attached to the lower part of the elastic plate. 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 vibrator. 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 sieving frame. 3. The vibrating screen clogging prevention device according to claim 1, wherein the flexible receiving member is integrally formed in a width direction of the sieving frame.