FR2483898A1 - ENDLESS BAND CONVEYOR SYSTEM FOR THE TRANSPORT OF RAW MATERIALS ON IMPORTANT SLOPES - Google Patents

Abstract

THE PRESENT INVENTION RELATES TO A CONVEYING SYSTEM, INCLUDING AN ENDLESS BELT, FOR THE TRANSPORT OF COARSE MATERIALS SUCH AS MINING STONE. ACCORDING TO THE PRESENT INVENTION, THE CONVEYOR BELT IS PROVIDED ON ITS LONGITUDINAL AREAS WITH ELEMENTS 6 EXCEEDING EACH SIDE OF THE SAID BAND AND ABSORBING THE TENSILE STRENGTH AND WITH A RELATIVELY FLEXIBLE ELEMENT FOR SUPPORTING THE LOAD BETWEEN SAID ELEMENTS 6, THE TAPE AND THE ELEMENTS 6 BEING SUSPENDED IN RACKS OF SPACED ROLLERS 5 HAVING SUPPORT ROLLERS 7 ON EACH SIDE OF THE TAPE TO ENTER INTO INTERACTION WITH THE SAID ELEMENTS 6. THE PRESENT INVENTION RELATES IN PARTICULAR TO THE TRANSPORT OF MATERIALS .

Description

The present invention relates to a conveyor system consisting of

  an endless conveyor belt specially, but not exclusively, for the transport of coarse materials, such as mine stone, mined ore, etc. For the transport of bulk materials such as wheat, coal, gravel, sand, chips, ore concentrate, mine stone, etc., many belt conveyors with rollers arranged in bats are known,

  which rollers support the conveyor belt and

  above which the band portion carrying the load is suspended. However, it is extremely difficult to transport, by means of this type of belt conveyors, particularly coarse materials, that is, mine stone and ore shot down from a low level to a high level along a belt. more than 200, and this is largely due to the fact that the material on windings will slide down the belt due to shaking and vibrations imparted to the belt by the rollers when the portion of the web carrying the load ahead of the pebbles, and if the material starts to slip there will be no

  opportunity to stop if not stop the band itself

  even. Without these tremors or vibrations of the belt, it would theoretically be possible to transport these materials by means of belt conveyors, at the summit of slopes having more than about 200 of slope, and at the summit of slopes having a maximum angle of inclination decdexclusively by the friction between the band and the material, and the flow angle of the material. However, since it has not been possible to eliminate these tremor from the strip has tried other means to make possible the transport of bulk materials above to the top of slopes of more than 200 by means of conveyor belt, we have

  in particular, found a solution with bands

  verture so named, that is to say it is an endless band disposed at the top of the band of onvoymr and extends beyondapari delabamdesupportant the load along the whole In addition, the cover strip is arranged to cover the material supplied to the strip at its lower portion, to press the material on the strip by its own weight, to retain it in this way on the strip and to prevent However, for this it is necessary that the cover strip be not only relatively heavy but also flexible so as to fit exactly around the material to prevent the formation of depressions or pockets between the strip and In case of formation of such noises, the material can slide backwards and lift the cover band off the band, which consequently causes a large loss of material. are not everything This is particularly the case for coarse materials of variable dimensions iUef such as for example the mine stone or the ore slaughtered, which materials can not be retained on a conveyor belt by said cover strips even for small slopes exceeding barely 200. Therefore, the cover strips are of limited use and in practice can be used advantageously only for light materials and insofar as such materials are fed continuously

  on the web in a continuous net having a transverse cut

  dirty almost constant and this for short lengths of conveying that is to say for the transport of these materials to and from the boat holds or the same. In the case of bulky materials of this type, there is also no belt conveyor by means of which such materials can be transported at the summit of steep slopes, and therefore practically only similar trucks or loading vehicles used for the transport of mine stones from underground cavities and tunnels, which also applies to the transport of ore from open-pit mines etc. In underground mines, the ore mined must be

  be ground to an adequate size before being transported

  This is usually done by means of ore vans, and so named in vertical shafts, which, like trucks, are of inferior capacity to the conveyor belt. This is why we also want to use belt conveyors. for the transport of mine stones and ore slaughtered over longer distances, but until now it has not been possible to achieve these desires with known belt conveyors because of their defects mentioned above which, in case transporting ecomebrantempeuvent material can be eliminated neither by said conveyors cover nor by any other means known per se to retain the material

on a conveyor belt.

  Therefore, the object of this. invention is the realization of this desire, that is to say the obtaining of a belt conveyor designed to be able to transport coarse materials * -7Xsque stone mine and ore slaughtered, as obtained after the slaughter, with a volume of up to 1 mI3, at the summit of slopes of at least 45 °. This object is achieved by the use of a belt conveyor according to the invention, whose endless band is provided, on its longitudinal edges, with projecting elements on each side of the band and a relatively flexible element serving at the support of the load between said elements, the strip as well as the absorption elements of the tensile force being suspended in spaced frames having support rollers on each side of the strip to interact with the absorption elements The invention will be better understood, and other purposes, characteristics, details and advantages thereof

  will become clearer during the description

  following explanatory diagram with reference to the accompanying schematic drawings given solely by way of example illustrating several embodiments of the invention, and in which - Figures 1, 3 and 5 are various schematic side sections of the belt conveyor according to the invention. invention disposed in a transport shaft and more exactly, FIG. 1 shows the feeding part of the belt conveyor, - FIG. 2 is a view on a larger scale along the line II-II of FIG. 1, FIG. 3 illustrates the end or the evacuation portion of the belt conveyor; FIG. 4 is seen on a larger scale along the line IV-IV of FIG. 3; FIG. Figure 6 is a sectional view along the line VI-VI of Figure 5 on a larger scale; Figure 7 is a view along the line VII-VII;

  of Figure 5 showing an intermediate training station

  8 is a sectional view of the tensile force absorbing element of the belt conveyor according to the invention; FIG. 9 is a sectional view of a modified embodiment of the conveyor belt; absorbent element-the tensile force of the conveyor belt, and - Figure 10 is a part of the conveyor belt

  according to the invention presented flat to show its profit-

transversal cemput.

  In the drawings the present belt conveyor is illustrated only as an example and is disposed in a transport shaft 1 for transporting the ore from a low level to a high level. The difference in level can reach several hundred meters and can be even higher if necessary. Between these levels the transport shaft 1 is driven at a slope of 450 and in this shaft 1 the conveyor belt 2 of the present conveyor is arranged to transport the ore from a feed station 3 to the bottom level of the conveyor. station

unloading 4 at high level.

  According to the principles on which the present invention is based, the conveyor belt 2 is suspended in the manner of a U in spaced apart frames 5a wy of tensile force absorption elements 6 formed at their longitudinal edges and which overflow on each side of the band itself and are supported by two support rollers 7 arranged in each of the frames 5, between

  which the band is thus in suspension and advance.

  The support rollers 7 in each frame 5 are somewhat inclined as illustrated in FIG. 6 and each support roller 7 must have its shaft 8 parallel to the surface of the element that absorbs the tensile force 6 above which it door. In addition, each frame of rollers comprises a counter-roller 9 which is arranged so as to maintain the element absorbing the traction force 6 in the correct position relative to the support brackets 7,

  especially in cases where the band passes from

  flat position in the inclined position or vice versa. The frames 5 are pivotally suspended in beams 12 fixed to the walls 10 of the shaft by means of bolts 11 or identical and studs 13, which must be parallel to the absorption elements of the tensile force 6 of the strip or more exactly at the tangent at the point where the element bears on the support wheel 7 of the associated roller unit -and in these studs 13, the frame of the rollers 5 must be suspended on each side of the adjoining beam 12 as illustrated in FIG. 5, the portion of the load-bearing strip 15 is suspended in the beams 12 by means of the frames 5 and the return section 16 is also suspended in said

  beams 12 by means of the pebble frames 17, which are

  pivoted like the pebble stands 5 and which may be of the same or simpler type,

  since they must not bear any significant load.

  However, the rollers 17 of the return part must be arranged as close as possible to one of

  the other to take the least possible space.

  At its feeding portion the conveyor belt 2 is suspended around the end roller 18 with guide grooves disposed adjacent to each other at the top of the end roller for the force-absorbing elements. pulling 6 of the conveyor belt. These elements are guided in said guide grooves by the rollers 19 of the return section 16 disposed immediately on the end roeLau 18, said roller frames 19 being suspended. has a

  level corresponding to the adjacent guide grooves.Lerou-

  the end water 18 is mounted with its shaft 20 on a U-shaped yoke 21 which is flush with its pJd * 22 by the fixed guides 23 and which is under the influence of a

  counterweight 26 by means of a cable 25, drawn

  above a number of pulleys 24, said counterweight

  26 holding the conveyor belt in extension. Said counter

  weight 26 is displaceably suspended in a guide 27 which is attached to the suspension 28 of an extension of the transport shaft 1. After the end roller 18

  in the forward direction of the conveyor belt -

  marked by the arrow 29 in the different figures, the

  conveyor belt 2 is enlarged by its absorption elements

  traction forces 6 which are shifted by means of a roller bed 30 above a belt conveyor 31 arranged to support the conveyor belt 2 when loading the material, which conveyor belt can be of the conventional type and operates at the same speed as the conveyor belt 2. The loading of material on the conveyor belt supported by the belt conveyor 31 is carried out via a loading pocket not shown in the drawings. from which the material is fed on the belt of the conveyor 2 in its direction of advance and with a free fall as small as possible and at the beginning., the fed material is supported exclusively by the conveyor belt in its direction of advance and is then successively received by the belt of the conveyor 2 while it is again closed by the absorption elements of the traction force 6 which are brought closer to the space provided between the frames For example, the belt of the conveyor is closed around the pieces of stone or ore of large volume which can reach several tons and plunge in "the band of

  conveyor by their own weight and irregular form

  and form cavities in it, which effectively prevents these pieces of XE slip bottom of the band although the slope has a leit of 450 at least, and which pieces constitute their turn stops for smaller parts that it is not possible to catch same.To these smaller pieces can also form or constitute such a depression preventing slippage in the conveyor belt 2, it consists of a relatively flexible material made of rubber or the like between the tensile force absorbing elements 6 at the transverse projection 33 in the form of a checkerboard formed by a strip 34 extending diagonally between the absorption elements of the tensile forces of conveyor belt or deun ropes

  suitable reinforcing material such as synthetic fibers.

  This reinforcement 33 relieves the transverse forces due to the material and transmits them to the tensile force absorption elements 6 which in turn are also provided with longitudinal reinforcement 35 in the form of a rope according to the embodiment. shown in Figure 8 or in the form of steel wire according to the embodiment of Figure 9. Well str other reinforcements than those mentioned above can be used for the tensile forces absorption elements of the gang

  of the conveyor as well as for its supporting part

  charge. The belt of the conveyor 2 advances towards its discharge end on an unloading conveyor 36 which discharges the belt of the conveyor 2 and widens so that its elements of absorption of the tensile forces 6 are separated by frames of rollers 37, which are shown diagrammatically in FIGS. 3 and 4, so that the conveyor belt 2 advances by being widened above its end roller 38, which can be driven and which is provided with grooves guiding and driving means for the tensile force absorbing elements 6 of the band in which grooves said elements 6 are guided by the rollers 39. The belt 41 of the unloading conveyor, the load bearing portion 42 is supported by rollers 43 arranged in illustrated bRtisis passing around the turiaul end 38 of the conveyor belt is thus driven by it

  at the same pace as the conveyor belt 2.

  After the end roller 38, the belt of the conveyor 2 is turned over by means of a roller for turning the belt so as to be returned to the rollers 17 provided for the return section of the conveyor belt, the purpose of this reversal of the band being to imprison the material entrained in the return section 16 and thus to pocket the reversal from the return section after

the flipping of the band.

  For longer transport lengths, the belt conveyor according to the invention must be provided with other drive means than the only end link 38 and one of these drive means is illustrated in FIGS. 5 and 7 in form. two driving gears 46 provided with a drive motor 45 and with driving grooves corresponding to the shape of the part of the absorbing elements the tensile forces exceeding the side of the belt, and which drive gears are disposed at a fixed reciprocal distance and consecutively, so that the absorption elements of the adjacent traction forces are under the firm of an S between their drive gears 46. The drive gears are suspended firmly in the transport shaft 1 and their axes 47 are perpendicular to the

  direction of advance of the conveyor belt.

  One of the advantages of the present belt conveyor is that it can also be arranged in curves which can be controlled and therefore dated from additional intermediate stations and on the extended parts and tension of the machine. band will be relatively small even over long transport lengths, due to the distribution of traction forces on a plurality of training stations along the belt

of the conveyor.

  On the other hand, each roller frame 5 may be provided with additional rollers acting against the lateral surfaces 50 in FIGS. 8 and 9 of the elements for absorbing the tensile force to guide the elements 6. Moreover, the part of the tape supporting the

  load may consist of any type of elastic

  tomère or a net formed of cables or other type of rope, being flexible so that, thanks to its dead weight, it allows the portion of the load-bearing band to have the empty shape of a U as illustrated

in Figure 6.

Claims (11)

  A conveying system for transporting materials at the top of steep slopes, comprising an endless conveyor belt, characterized in that the conveyor belt (2) is provided on its longitudinal edges with elements protruding from both sides of the conveyor belt. strip and absorbing the tensile stresses (6) and relatively flexible melting for the support of the load between these elements and in that the band} and its elements of asorption of the tensile force, is suspended in pebble frames (5) having support rollers (7) on each side of the web to interact with   the elements absorbing tensile forces.   Conveying system according to claim 1, characterized in that the roller frames are pivotably suspended to rotate about a shaft (8).   parallel to the absorption elements of the efforts of traction (6).   3. Reaming system according to one of the claims   1 or 2, characterized in that the conveyor belt is supported at its feed end and at its discharge end by a conveyor belt (31) discharging the   part of the load bearing belt.   4. Conveying system according to any one of   preceding claims, characterized in that   intermediate drive stations are arranged between the feed and discharge ends of the conveyor belt, said stations having two drive gears (46) provided with drive motors (45) for each of absorption elements   the driving force of the conveyor belt.   5. Conveying system according to any one of   preceding claims, characterized in that each   pebble beam (5) comprises a counter-roller (9) for holding the respective tensile force absorption elements (6) in correct position relative to the rollers support (7).   6. Conveying system according to any one of   preceding claims, characterized in that the   The conveyor belt (2) is arranged to extend over the end belt at one end of the discharge. 7. Conveying system according to any of the   preceding claims9 characterized in that the   conveyor belt (2) is arranged to advance suspended above an end block, at its loading end 8. Conveying system according to any one of   preceding claims, characterized in that the   conveyor belt (2) is extensible, the increase of the power required for its extension being obtained by the addition of additional intermediate drive stations along the part to be extended 9. Conveying system according to any one of   preceding claims, characterized in that the   part of the load-bearing belt is elastomereo 10. Conveying system according to claim 9, characterized in that the elastomer is totally or partially reinforced, the reinforcement being in the form of checkerboard along its entire length or between the elements.   absorption of the tensile force.   Conveying system according to one of the claims   1 to 8, characterized in that the portion of the load-carrying strip (2) consists of a flexible rope net such as a cable.