SU1477481A1 - Vibrating screen - Google Patents

Abstract

The invention relates to devices for separating bulk materials by size on sieves. The goal is to increase the reliability and performance of the screen. The screen consists of a duct (K) 1, a sieve (C) 2, peripheral supports 3, tension devices (NP) 4 and clamping wedges 6. Supports 3 are fixed along the walls K 1 and form longitudinal wedge-shaped grooves with them. With supports 3 mating NP 4 with the possibility of sliding along them to the walls K 1. To eliminate over-stretching C 2, movements of NP 4 are limited by adjusting stops 7. Securing NP 4 on separate sections of side edges C 2 alternating with unfixed sections C 2 provides the wave-like nature of oscillations of the sifting surface along the length of the screen, intensifying the sieving process. For securing C 2 to NP 4, the latter are made integral with the frames 5 in the form of profiles open inwards K 1, between the shelves of which the side edges C 2 are clamped by means of wedges 8. At the same time, to increase the reliability of the mounting of the surfaces of the shelves, conjugated with C 2, spikes, and the surface of the shelves, coupled with wedges 8, have corresponding wedges and longitudinal and transverse slopes. With the same purpose, elastic gaskets are installed between the wedges 8 and the clamped edges C 2. 2 hp f-ly, 3 ill.

Description

The invention relates to the field of the mining industry, in particular, to devices used in the separation of bulk material by size class.

The purpose of the invention is to increase the reliability and performance of the screen.

FIG. 1 shows a crash, cross section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the node I in FIG. 1f

I

Vibrating screen consists of

the box 1, the sieve 2, the peripheral supports 3 fixed along the walls of the box 1 and forming with them the longitudinal and wedge-shaped grooves, the tensioning devices 4, made integral with the frames 5, having profiles that are open inside the screen of the rumble box and clamping wedges 6. Nat The fixtures 4 are coupled with the peripheral supports 3 with the possibility of sliding along them to the walls of the box. The movement of devices 4 is limited by adjusting lugs 7. Between the shelves of the frames 5, the side edges of the sieve 2 are clamped by means of wedges 6. The surfaces of the shelves 9 of the frames 5, mated with the edges of the sieve, are made with spikes 10, and the surfaces of the shelves 11 mated with wedges 8 have longitudinal and transverse slopes corresponding to these wedges. Elastic gaskets 12 are installed between the clamped edges of the screen 2 and the wedges 8.

Tensioning devices 4 of the statutes on separate sections b of the lateral edges of the sieve 2 alternating with the loose sections of the 1 sieve.

The principle of operation of the device is as follows.

When driving clamping wedges 8 are hammered, the frames 5 together with the tensioning devices 4 slide along the inclined surfaces of the supports 3 towards the walls of the duct, providing lateral tension of the sieve 2 in areas b. The movement of the tensioning devices 4 takes place prior to their contact with the limiting lugs 7, adjusted to the required degree of cross-screening of the sieve,

When replacing the sieve 2, knock out the wedge 8, loosen the tension of the sieve and remove the wedge 8, freeing the edges of the sieve. The installation of the sieve is carried out in reverse order.

The presence of stops 7 eliminates the possibility of over-tensioning the sieve, which reduces its service life, and the fastening of the sieve in the frames 5 with the help of spikes 10, wedges 8 and gaskets 12 ensures the reliability and speed of fixing the side edges of the screening surface. The implementation of the shelves 11 in the frames 5 with transverse and longitudinal slopes corresponding to the slopes on the bearing surfaces of the wedges 8 allows for a reliable fixation of these wedges.

When the screen is running, the vibrations of the screening surface along the screen will have a wave pattern. On the fixed sections b across the width of the duct, the sieve will be more tensioned than on sections 1, and hence the magnitude of the oscillation amplitude will be different. In sections 1, the magnitude of the oscillation amplitude will additionally be larger by L a (Fig 2, dashed lines) than in sections b.

Claims (2)

1. Vibrating screen, including a screen with a sieve, peripheral supports fixed along the walls of the box and forming longitudinal wedge-shaped grooves with them, tensioning devices of the screen fixed on the side edges of the screen and coupled with peripheral supports with the possibility of sliding along them to the walls of the screen and clamping wedges, characterized in that, in order to increase the reliability and performance of the screen, it is equipped with adjusting stops to limit the movements of the tension devices, and the tension devices Lena on separate portions of the side edges of the screen, alternating with loose sections of the screen. 2 .. The vibrating screen according to claim 1, characterized in that it is provided with elastic pads and built-in frameworks with trough-shaped frames that have trough-shaped open profiles inside the screen box, between the shelves of which the side edges of the sieve are clamped by means of wedges, while the surfaces of the shelves of the profiles are spiked, the surfaces of the shelves mated with wedges have longitudinal and transverse slopes corresponding to these wedges, and elastic pads are installed between the wedges and the clamped edges. 9 Fml eleven Yu Fig.Z