SU906628A1 - Screen - Google Patents

Description

(54) DINING

I

The invention relates to the technique of sifting bulk materials in quarries, intended for section. laziness of materials into fractions and can be used in the construction materials industry, chemical, mining, food industries and other sectors of the national economy.

Known screen, the principle of which consists in the pulse interaction of the material with the front of a traveling wave of an elastic sieve p.

The disadvantage of this screen is the low efficiency of the screening process. The closest in technical essence and the achieved effect to the proposed device is a screen comprising a housing, loading and unloading means, a drive, elastic sieves and a device for transmitting movement to the sieves 2.

The disadvantages of such a screen are: (the creation of favorable conditions for the first phase of screening with this design (penetration of small particles through a screen of material to a sieve), which reduces the efficiency of screening and the structural complexity of the kinematic scheme for alternating tension plots sit.

The purpose of the invention is to increase the efficiency of the screening process.

The goal is achieved by the fact that the device for transmitting movement to the sieves is made in the form of pantographs installed parallel to each other, with the tops of the pantographs being interconnected by strips to which the sieves are attached.

FIG. 1 shows a crash, general view; in FIG. 2, the same plan view.

The screen comprises a body 1, elastic upper 2 and lower 3 sieves, a device for unloading k and a hopper 5 for

material loading, drive 6, crank type and device 7 for transmitting movement to the screens. Elastic sieves are made of rubber or rubber strings stretched along the screen. The device 7 for transmitting movement to the screens is made in the form of pantographs parallel to each other in the screen. The upper and lower tops of the pantographs are interconnected in pairs by strips 8, to which the sieves 2 and 3 are attached.

The roar works as follows.

The material to be separated is fed into the bunker 5 and, after separation on sieves 2 and 3, is discharged through the discharge device k, the crank drive 6 drives the reciprocating movement to the pantographs 7. When the connecting rod of the drive 6 moves along the material, the four-link chain is reduced and the sieve sections sag, the chain is retracted when the connecting rod of the drive rod moves: the four-linkage elongates and tension of the sieve sections occurs

This type of movement of the slack surface in screens has a positive effect on the first phase of screening, i.e. the phase of penetration of the fine particle through the layer of the rattling material to the sieve, and continuous deformation of the sieves in the process of work ensures the intensification of the second phase, the passage of the particle through the sieve, which contributes to the increase in the efficiency of screening

  In addition, this type of movement of the working surfaces of the screens prevents clogging of the gaps between the strings of labor-conductive grains and clay inclusions, which also increases the efficiency of screening. The design of the device for transmitting double-sided screens is greatly simplified compared to the known screens.

The advantage of this screen design is also a significant reduction in vibration transmitted on the basis of screen compared to resonant and other screens.

invention formula

Screen, including body, loading and unloading means, drive, elastic sieves and two-way device for transferring screens, characterized in that, in order to increase the efficiency of the screening process, the device for transmitting movement to the screens is made in the form of pantographs installed parallel to each other, and the tops pantographs are interconnected by straps to which the sieves are attached.

Sources of information taken into account in the examination

1. USSR author's certificate number 173529, cl. B 07 B 1 / 28,1975.

2. USSR author's certificate No. 297158, Clo B В 07 1/28, 1968 (prototype).

Fig.T

FIG 2

Claims (1)

Claim A screen comprising a housing, loading and unloading means, a drive, elastic sieves and a device for transmitting the movement of the sieves, characterized in that, in order to increase the efficiency of the screening process, the device for transmitting the movement of the sieves is made in the form of pantographs installed parallel to each other between the screens, and the tops of pantographs are interconnected by strips to which sieves are attached.