SU1505601A1 - Arrangement for securing elastic sieve - Google Patents

Abstract

This invention relates to the separation of bulk materials by size on sieves (C). The goal is to increase the reliability of operation C 1. The device contains intermediate supports C 1, made in the form of rigid beams 5 with protrusions (B) 6 oriented perpendicularly to the surface C 1. Intervals of location B 6 are multiples of the location of cells (I) 2, and B 6 themselves are placed with tension in H 2 and have the ability to rotate relative to beams 5 in a plane perpendicular to the direction of movement of the material along C 1. Cross-section contours B 6 can be made similar to cross-section contours I 2, which reduces the likelihood GOVERNMENTAL conjugated displacements at the nodes attachment surfaces. The ability to rotate B 6 prevents the movement of the C 1 elements fixed in the supports forming I 2. Thus, movable friction pairs in the attachment points are eliminated. This reduces heat generation and eliminates wear on the rubbing surfaces at the moving contact. 1 hp f-ly, 14 ill.

Description

31505601

The invention relates to devices for separating bulk materials by size on sieves and can be used in the metallurgical, coal and other industries of the industry.

The aim of the invention is to increase the reliability of the sieve.

Pa figs. 1 shows the fastening of an elastic sieve, top view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the node I in FIG. 2; in fig. 4- sieve attachment unit to the intermediate support, option; in fig. 5 shows a section 15BB in FIG. four; in fig. 6 - mount an elastic sieve, option, top view; in fig. 7 is a section bb of FIG. 6; in fig. 8 - section G-Y in FIG. 6; in fig. 9 - fastening of an elastic sieve, option 20, top view; in fig. 10 - fragment of intermediate support from the protrusion; in fig. 11 is a section d-d in FIG. 9; in fig. 12 - diagrams of location of PIA of intermediate supports; in fig. 13 - 25 installation diagram of an elastic sieve; in fig. 14 is a fragment of the interface between the protrusion and the intermediate support with the sieve mesh during installation.

The fastening of the elastic screen 1 30 (FIG. 1) with cells 2 includes a peripheral mount 3 and intermediate supports 4, made in the form of rigid beams 5, provided with protrusions 6 oriented perpendicularly 5 to the surface of the screen 1 and separated grooves 7. The sieve 1 can be made in one piece or sectional, containing a set of elements fixed in supports in the form of cards 8 with holes, 40 2 (Fig. 6) or string bands 9 (Fig. 9) with prismatic projections 10 on the lateral surface forming sifting cells during assembly 2

The protrusions 6 of the intermediate support e are installed with the possibility of rotational oscillations (Fig. 3, arrow a) relative to the beam 5 in the plane YOZ, perpendicular to the X axis coinciding with the direction of movement of the material along the sieve, the transverse dimension of the original I of the protrusion 6 exceeding the corresponding size d holes and is taken from the ratio of I (1.1-1.25) d.55

The projections 6 (FIG. 3) can be connected to the rigid beam 5 by means of an elastically deformable elastic web 11, made in the footer 50

0 5

0 5 0

five

0

The old bar 12, which is made of molded rubber or polyurethane, is rigidly attached to the beam 5, while the flexural rigidity of the web 1 1 in the plane YOZ is less than the rigidity of the protrusion 6.

The projections b (Fig. 4) can be connected to the beam 5 by means of a shaft 13 mounted in rubber-metal hinges 14, providing the possibility of elastic rotary oscillations in the plane YOZ c5 relative to the axis.

The projections 6 in the plan, i.e. in section, parallel to the screening surface, can be made in the form of a figure similar (congruent) and concentric holes 2 (Fig. 6) or cells 2 (Fig. 9) and arranged with a pitch T, a multiple step t of the arrangement of the holes 2 (2), i.e. the shape and dimensions of the protrusions 6 (6) are determined by the corresponding parameters of the screening holes 2 (2) and the thickness S of the sieve 1, With a constant distance B between the peripheral fastenings 3, a change in the number of supports 4 and their installation locations (Fig. 2 and 13) a different free length 1 (l, 1) of elements 8 (9) in different parts of the device, which causes different values of the amplitude of the (relative) vibrations of the elements and their carrying capacity.

For increasing the reliability of fastening the elements 8 (9) in the intermediate support 4, the protrusions can be made of a material whose rigidity exceeds the rigidity of the material of the elastic sieve. The order of installation of the sieve depends on the design of its elements. When mounting the cards (Fig. 14), the apertures 2 are mounted above the protrusions 6, and under the action of the directional force P applied to the mandrel 15, the card is fixed with tension on the protrusions. By making a protrusion with a size I exceeding the size d of the aperture, the elastic material of the sieve is compressed around the protrusion, and the elastic compressive forces Q acting on its ledge along its perimeter ensure reliable fixing of the cards in the intermediate supports 4, the arrangements of which are shown in FIG. 13.

When mounting a string-string sieve (Fig. 9-11), the string tapes 9 are pushed with a tension into the grooves 7 occasionally by adjacent protrusions 6 and thereafter are fixed in a known manner to peripheral supports.

During the operation of the screen, the elastic sieve makes elastic oscillations with respect to the fixing points in the YOZ plane with amplitude A ", as well as horizontal movements in the plane of the screening surface with amplitude A". Depending on the design of the mount, the elastic rotational movements of the protrusions 6 (6) are realized in the bridge 11 of the beam 12 by making it with the minimum flexural rigidity (Fig. 3) of the rubber in the metal joint 14 (Fig. 4). The first design is recommended for devices operating in heavy load conditions, it is characterized by increased reliability due to the minimum number of parts in the mount. A light and medium mode of operation is recommended to design the device using rubber metal hinges 14, which is characterized by simplicity of equipment (molds) for the manufacture of hinges. The implementation of the protrusions 6 intermediate supports can be rotated to prevent movement of the elements 8 (9) in the attachment points relative to the protrusions 6, i.e. mobile (with a gap) pairs of friction in

fastener nodes, which reduces the 35 cross-section of the protrusions and collapses heat generation and eliminates wear of the rubbing surfaces in place

not similar to the contours of the cross section of the sieve cells.

rolling contact. This allows, under alternating load conditions, to increase the durability of the screening surface.

Making cross-section contours of the protrusions 6 (6) with similar cross-sectional contours of the cells 2 (2), as well as coupling the protrusions and cells with a tension, reduce the likelihood of relative displacements of the mating surfaces at the attachment points, and thereby contribute to increasing the durability of the screen .

J5 Formula of Invention

Claims (2)

1. A device for fastening an elastic sieve, including intermediate supports of the sieve, made in the form of rigid beams with protrusions for fastening the sieve, oriented perpendicularly to its surface, about the fact that, in order to increase the reliability of the sieve, the protrusions are arranged at intervals that are multiples of the cell positioning step, and for placement in the cells with a tension, wherein the protrusions are mounted with the possibility of rotation relative to the beams in a plane perpendicular to the direction of movement of the material along the sieve. 2. The device according to p. 1, O T L and 0 five 0 contour not similar to the contours of the cross section of the sieve cells. t apappfppe Q П D D П с DDDDlOnnni: 3IA  five 2 5 .1 Fi.g.5 Fi, s.6 FIG. Q 5 Fig. In x Fig.Z i j at but Phi g.1 Editor I. Shulla Compiled by M.Zaitsev Tehred M. Didyk Order 5379/8 Circulation 542 V1SHI1SH of the State Committee on Inventions and Discoveries at the State Committee on Science and Technology of the USSR 4/5, Moscow, Zh-35, Raushsk nab. 113035 Aa -. igM Proofreader M.Maksimishinets Subscription