RU2487764C1 - Screen loading section - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to mining, particularly, to screening of lump materials. It may be used in equipment intended for storage, transportation and processing of lump material in mining, metallurgy, coal and construction industries. Screen loading section comprises intake composed of rigid metallic structure secured to tie-beams, and elastic elements. Elastic elements are composed of vertical plate arranged in dense rows along material feed direction. Said plates are hinged rods arranged horizontally at section metallic structure across material fee direction.

EFFECT: higher reliability and durability, decreased impact load.

3 cl, 3 dwg

Description

The invention relates to devices designed to protect against wear and tear of the structure of mechanisms and devices caused by bulk material supplied to them. The device is applicable in the construction of various types of equipment for storage of transportation and processing of bulk material. In particular, the screens that are most common in the mining, metallurgical, coal and construction industries.

Inertial screens are known, containing a box carrying a screening surface mounted through elastic elements on a fixed building structure. The box is driven into vibrational motion by a vibration exciter installed on it (O.S. Bogdanov. Guide to ore dressing, vol. 1. M: Nedra, 1982. p. 36).

The disadvantage of this design is the premature failure of the screening surfaces and structural elements of the box due to shock and abrasion due to a drop in the supplied mass in the loading zone. To prevent premature failure of the screening surfaces, devices protecting the net from impacts of the supplied mass are provided in the loading zone. The loading part is covered with metal or rubber sheets (N.G. Bedran. Machines for mineral processing. Kiev-Donetsk: Vishcha school, 1980. Page 104). The disadvantage is the low resistance of both metal and rubber sheets.

Closest to the claimed technical solution is known on the application for invention No. 2004111111, a vibrating feeder (loading section) of a screen containing a receiver made in the form of a rigid metal structure, mounted on tie beams and elastic elements.

The disadvantages of the known boot section are:

- low reliability and wear resistance due to the rapid wear of elastic elements, due to the high shock load on the structural elements;

- the massiveness of the metal structure for installing the lining sheets, since the structure must counteract significant shock loads;

- inconvenience in the assembly and replacement of worn structural elements.

The technical result of the claimed invention is to increase reliability, wear resistance, reduce shock load on the structural elements of the screen and create a structure with effective protection from falling material.

The technical result is achieved by the fact that in the loading section of the screen containing the receiver, made in the form of a rigid metal structure, mounted on a tie-beam, and elastic elements, according to the invention, the elastic elements are made in the form of rows of vertically oriented plates mounted close to each other, oriented along the feed mass.

The upper section of the plates is made in the form of a saddle curve.

The plates with the help of grooves made at the extreme points of the plates are pivotally fixed on rods located horizontally on the metal structure of the section, across the course of the supplied mass.

At the bottom of each plate, holes are made.

The execution of elastic elements in the form of rows of vertically arranged plates arranged adjacent to each other, oriented along the feed mass allows the vertical component of the velocity and impact energy of the feed mass to be extinguished, since the plates fixed at their extreme points work as a beam in bending, thereby reducing the load on device, which improves its reliability and significantly extend the life of the machine (device).

Due to the vertical arrangement of the plates under the blows of the supplied mass there is a thick layer of elastic material, which increases the reliability and durability of the section design.

The execution of the upper cut of the plates in the form of a saddle curve allows the feed mass, due to the shape of the upper cut of the plates with a uniform distribution in width, to descend from the loading section in the direction coaxial with the general movement of the mass on the screen. Impact on sieving surfaces and structural elements does not occur.

Pliable articulation of the plates by means of grooves made at the extreme points of the plates on the rods located horizontally on the metal structure of the section, across the course of the feed mass, simplifies the assembly of the loading section and allows easy replacement of worn plates. Due to the flexibility of hinging the plates on the rods, their installation can be done by hitting the top of the plate. In this case, the plate is deformed, allowing the grooves to cover the rods of the receiver, thereby ensuring fixation.

The implementation of the holes in the lower part of the plates allows to increase the elasticity of the plates in the vertical direction when receiving the supplied mass, which leads to effective shock absorption. Thanks to the same holes, the elasticity of the plates increases in the horizontal direction along the feed mass, which allows the plates to be fixed by winding the grooves made in the plates onto the rods, which also simplifies the assembly of the loading section and allows easy replacement of worn plates.

The essence of the claimed invention is illustrated by the drawings:

Fig. 1 shows a general view of the loading section of the screen;

Fig. 2 shows section AA in Fig. 1;

Fig. 3 - shows a side view of the elastic elements (plates).

The loading section of the screen containing the receiver 1, made in the form of a rigid metal structure, mounted on a tie-beam 2 and elastic elements, where the elastic elements are made in the form of rows mounted vertically adjacent to each other, plates 3, oriented along the feed mass. The upper cut of the plates 3 is made in the form of a saddle curve. The plate 3 using the grooves 4 made at the extreme points of the plates 3 are pivotally fixed to the rods 5, located horizontally on the receiver 1, across the course of the supplied mass. In the lower part of each plate 3, holes 6 are made.

According to the results of production tests of the declared loading section of the screen conducted at Karelsky Okatysh OJSC, the operating time was 2477 hours with an average load of 700 tons per hour, while the wear of the inventive device is minimal (the protocol of a technical meeting on testing the claimed device is attached).

The roar works as follows. Torque from the electric motor through the coupling is transmitted to the unbalanced vibrator. When the vibrator rotates, the box receives circular vibrations. Together with it, the same vibrations are obtained by the screening surfaces, the loading section and all the elements fixed to the box.

The boot section works as follows. When the feed mass falls on the plates due to the elasticity of the material from which the plates are made, the flexibility of hinging the plates on the rods, the saddle-like shape of the upper cut of the plates, the holes in the lower part of the plates, the vertical component of the velocity is quenched.

The loading section can be used to protect against wear and tear of various types of equipment for storage of transportation and processing of bulk material, for example feeders, transshipment points, hopper receiving zones.

Claims (3)

1. The loading section of the screen, containing the receiver, made in the form of a rigid metal structure, mounted on a connection-beams and elastic elements, characterized in that the elastic elements are made in the form of rows of vertically arranged plates mounted adjacent to each other, oriented along the feed mass, plates using grooves made at the extreme points of the plates, pivotally fixed to rods located horizontally on the metal structure of the section, across the course of the supplied mass. 2. The loading section according to claim 1, characterized in that the upper section of the plates is made in the form of a saddle curve. 3. The loading section according to claim 1, characterized in that the holes are made in the lower part of each plate.

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