SE439290B - Vibrating conveyor belt equipped with a screen - Google Patents

Abstract

Conveyer furnished with a screen, where the conveyor includes a chute (1) designed to vibrate relative to a foundation (2) and by that transport material.According to the invention, there is at least along a section of screen (1) a number of similarly mounted parallel rods (21) and between each one of these an upright band-iron (18). Columns (23) with a certain breadth are trained between each rod (21) and nearby band-iron (18). The rods (21) are fixed to the screen (1) while the band-iron is fastened relative to the foundation (2).Through this the rods (21) will vibrate while the band-iron (18) remains still, whereby the material fractions at a size the same as or smaller than the width of the rods (23), effectively passes through the rods (23).<IMAGE>

Description

-_.._. 8300261-8 'g vibrating conveyor where the invention is applied and where figure 2 shows a section along the line A-A in figure 1. In figure 1 schematically a so-called vibrating conveyor which comprises a U-shaped groove 1 in cross section, a foundation 2 and a number of suspension struts 3, ü, 5 which articulate support the groove 1. Furthermore, there is a drive machinery 6 of known type which consists of a driven eccentric mechanism. The structure of the vibrating conveyor is known per se, which is why it is not described in more detail.

When the drive mechanism acts on the chute 1, it will vibrate forwards / upwards resp. backwards / downwards so that the material in the gutter to be transported is transported in the direction of the arrow 7 through repeated throwing movements.

According to the invention, such a vibrating conveyor is provided with a self-cleaning screen.

Holes 10,11,12 are received in the vertical walls 8,9 of the gutter 1, 9,9 through which two parallel beams 13,1h run.

The beams 13,14 are arranged at a certain mutual distance corresponding to the desired! length of the sieve.

The beams 13,1h are supported by struts 15,16,17 which are fixedly connected to the foundation 2. Between the beams 13,1Ä run a number of upright plates or strip iron 18. These strip irons 18 thus stand still when the gutter 1 vibrates.

The gutter 1 is at a certain height from its bottom provided with plates 19,20 which extend over the entire width of the gutter. 22 as the plates 19,20. The rods 21, as well as the plates 19,20 are thus fixedly connected to the gutter 1.

Said rods 21 are placed at a certain mutual distance and placed in the spaces between the belt irons 18, so that a gap 23 of a certain width, denoted by the letter b in Figure 2, is formed between a rod 21 and the surrounding belt iron 18, or alternatively between a rod 21 and the gutter 1 wall 3.9.

PÛOR à fl UAl-lïlls in 8300261-8 The width b of the gap 23 is selected so that the fractions that are desired are passed through the gap 23 while larger fractions are transported further.

The function of the device is as follows.

Materials, such as wood chips containing a certain amount of sand or gravel, are fed onto the plate 19 as shown by the arrow Z fi. The material is transported by the shaking movement of the gutter 1 up to and in over the sole 18,21. Because the rods 21 vibrate while the belt irons 18 are stationary, enorelative movement will take place partly in the longitudinal direction of the gutter 1 and partly in its height between the rods and the belt iron. In this case, a very efficient screening is obtained where the screen 18,21 is self-cleaning thanks to the said relative movement. Furthermore, the relative motion means that the material is effectively mixed. The fractions that pass through the slots 23 end up on the bottom 22 of the gutter and are transported further on this to finally be emptied - as the arrow 25 indicates. non-separated material is transported further in over the plate 20 and discharged as the arrow 26 indicates. Of course, the fractions are not allowed to mix again at the end of the conveyor, but the flows 25,26 are kept separate.

Such a gutter 1 can for instance be 5 to 10 meters long, 0.5 to 1 meter wide and the screen 18,21 can have a length in the longitudinal direction of the gutter 1 of 2 to 5 meters. The gaps 23 can have a width from 1 mm up to tens of mm. Of course, the dimensions depend on the desired transport capacity, materials to be transported and which materials and fractions to separate. The dimensions can of course deviate from those specified. Although rods 21 are preferable to other cross-sectional shapes, rods themselves can be replaced by, for example, strip iron. It is also quite equivalent to have the strip irons 18 attached to the gutter 1 and the rods 21 in the beams 13.1h. Furthermore, any suitable vibrating conveyor can be used.

The plates 19,20 can be removed and the sieve 18,21 form the bottom of the gutter 1 along a certain distance, whereby separated fractions fall down under the gutter.

Thus, the present invention is not to be construed as limited to the above-mentioned embodiment, but may be varied within the scope of the appended claims. on niinuïv

Claims (3)

83002614 Patent claim Conveyor provided with a sieve, which conveyor is a so-called vibrating conveyor comprising a foundation (2) and a chute (1) supported above it, intended to vibrate relative to the foundation (2) and thereby convey material, wherein along at least a section of the chute (1) a sieve (18,2l) characterized in that the sieve (18, 21) is formed by a number of mutually parallel bars (21) or correspondingly fixedly connected to the gutter (1) and a number of mutually parallel upright upright strip irons (18) or the like, which are fixedly arranged in relation to the foundation of the conveyor, where a belt iron is placed in each space between the rods (21) so that columns known per se (23) are formed between each rod (21) and adjacent belt iron (18). ), whereby when the chute (1) vibrates the rods (21) will perform a reciprocating vibratory movement relative to the stationary belt irons (18), usually, as is known, fractions of a size equal to or less than said columns width is separated from the fed material. 2. Conveyor acc. claim 1, characterized in that a plate (20) is arranged over the entire width of the gutter (1) and a piece above the bottom (22) of the gutter (1) and after and at substantially the same level as said rods (21) for transport of fractions not separated at the sieve (18,21). 3. Conveyor acc. claim 1 or 2, characterized in that the strip irons (18) are supported by beams (13, 14), which are connected via openings (10, 11, 12) in the vertical walls (3, 9) of the gutter (1) via struts ( 15,16, 17) with the conveyor foundation (2). POÛ tsnuALlu