MXPA01001468A - Triple rollers of load for conveyor band of in bulk material. - Google Patents

Abstract

The present invention is about a roller that forms the series of three that normally support in each point of the conveyor, the band, forming a canal with curvature without abrupt slope changes. The advantage of said structure in comparison with the ones already in existance takes root in allowing the availability a three rollers system, with more adaptability to the band during its movement6 to avoid abrupt slope changes in the curve which is formed, avoiding the damages and wear and tear provoked to the conveyor band for the conformation given in the mountage of the traditional rollers and in the spavce between rollers of a same third and avoiding a stock of single rollers with different angles and angles changes in the tundish, and avoiding the need of changing the whole big roller when required. The invention is characterized because the conformation of the external surface of the three rollers, the central and the two lateral ones is curved and when forming the triple help to the band formation from a curved tundish of different types parabolic, hyperbolic and ellipse among others, and different parameters of these curves, focal distance and diameter.

Description

TRIPLE LOAD ROLLERS FOR BULK MATERIAL BAND CONVEYOR FIELD OF THE INVENTION The present invention relates to a triple loading roller for belt conveyors of bulk products. More specifically, it is a roller that, when forming the series of three that normally support at each point of the conveyor, the band, form a channel with curvature without abrupt changes of slope.

BACKGROUND OF THE INVENTION Currently, in heavy duty bulk conveyors, of the type used to transport bulk products such as gravel, sand, aggregate materials and similar materials, load carriers of the type that have a three-roll loading assembly are used (roller triple), which are arranged in the upper part of the support structure of said conveyors, through a series of brackets, which provide the conveyor belt with a channel-like conformation.

In said assembly the central rollers are arranged in a horizontal position and the lateral rollers are arranged with a predetermined predetermined inclination, upwards and outwards, in order to provide the channel conformation to the belt through which the aggregate materials are transported in bulk.

The type of arrangement and shaping of the loading rollers hitherto used have disadvantages that affect the improper operation of the conveyor. Among the great disadvantages and problems that are generated is found; the accelerated wear suffered by the conveyor belt in the lower part during its advance, when it is loaded with said materials, due to the continuous friction caused by the edges of each edge of the central rollers and the edges of the lower edges of the rollers lateral The previous brings as a consequence the need to change the band when it has suffered significant damage, which happens frequently. s In the Mexican patent application 00 1323, of the same inventor and applicant of the present invention, a solution to the aforementioned state of affairs is proposed, resolving this problem quite well. This extensive patent application is incorporated for consultation purposes. However, said solution has a series of drawbacks that require that in some cases another solution alternative could be available.

The production of the single loading roller of the aforementioned application requires a mold too large, with all that this implies, which in addition to complicate its production, by effects of stress developed during its operation also requires a certain amount of material , which in relation to the traditional system (three rollers), make it more expensive.

In addition, for a change of angle in the trough formed by the band in contact with the rollers, a change of the single roller is required, making necessary a stock of rollers for different angles.

A roller system that achieves the advantages of the single roller but with the same effect would mean an important advance in the state of the art.

OBJECTIVES OF THE INVENTION An object of the present invention is to make available a system of three rollers, which provides greater adaptability to the band during its advance to avoid changes of steep slopes in the curve that is formed.

Still another objective of the present invention is to prevent damage and wear caused to the conveyor belt by the conformation given by the assembly of the traditional rollers and by the space between the rollers of the same third.

One more goal is to avoid a stock of unique rolls with different angles and changes of angles in the trough, and avoid having to change a large roller when maintenance requires it.

And all those qualities and objectives that will become apparent when making a description of the present invention supported by the illustrated modalities.

BRIEF DESCRIPTION OF THE INVENTION Broadly speaking, the present invention consists of load rollers with an external conformation such that forming each third with said rollers forms a curve on which the band rests, without sudden changes of slope and without spaces between the rollers that could make that the band suffers excessive wear when being forced by the weight of the material that transports to enter these spaces.

This external conformation of the rollers, which form curves that can vary in type (semicircular, elliptical, parabolic, etc.), may also vary in the parameters of these curves. To conform these curves, the rollers must also have their own conformation.

Also, the structure of the rollers has been designed for ease of production and assembly, reducing the number of different parts to reduce the stock of different parts and the molds required to produce these parts.

The invention basically consists of load rollers with diameter, throughout their length, variable. However, there are endless modalities that can exist with this characteristic, and each one can have its advantage with respect to the other.

For example, we could talk about a modality in which the three rollers of each third have the same conformation. This characteristic of equal conformation gives a certain rigidity of form, dimensions, and changes of slopes to the curve that they will form when integrating the third.

To achieve the curve with three rollers of the same conformation it is required to fix the inclination of the lateral rollers and the proximity of the ends of said lateral rollers to the central roller. Each roll shaping will serve for a tilting of side rolls and a separation of the ends of the given rolls. A change in these parameters would produce "steps" that would cause the band to suffer efforts that reduce its useful life.

Different conformations are possible on the central roller and on the sides. The inconvenience that would have would be to require an additional mold, but would gain flexibility in shaping different curves, with different dimensions and changes of slopes.

BRIEF DESCRIPTION OF THE FIGURES Figure 1 shows an isometric illustrating the assembly of a conventional triple roller belt conveyor.

Figure 2 illustrates in isometric the assembly of a single roller belt conveyor.

Figure 3 illustrates a front view of a triple roller assembly the teachings comprising the present invention.

Figure 4 is a conventional perspective view of the roller forming the triple structure of the present invention.

Figure 5 illustrates a longitudinal section of the roller illustrated in Figure 4 Figure 6 illustrates in an exploded view the roller illustrated in Figures 4 and 5 and its relationship with the base on which it is supported.

For a better understanding of the invention, a detailed description will be made of some modalities thereof, exhibited in the drawings that are annexed to the present description for illustrative purposes, but not limitation.

DETAILED DECRIPTION OF THE INVENTION The characteristic details of this structure in some preferred embodiment is illustrated and described in the following figures.

Figure 1 shows an isometric illustrating a bulk product conveyor with a conventional assembly of three cylindrical load rollers, disposed at the top of the support structure. In said figure, the support structure is formed of two grooved profiles 101 and 102 with an inward opening, arranged at each end along the conveyor, both profiles 101 and 102 are joined by transverse bars or arms 103.

The support structure is supported at a suitable height by means of a plurality of fixed legs 104 to the floor at appropriate intervals along the longitudinal section of the conveyor. A continuous transmission belt 105 is disposed along the conveyor, which is supported by means of a three cylindrical loading rollers assembly, constituted by a central roller 107 and two side rollers 108 and 109. The three rollers 107, 108 and 109, are independent rollers, mounted rotatably on their own axis, with their respective bearings in a pair of brackets 106.

The central roller 107 is arranged horizontally, through the shaft 112 mounted on the transverse bar 103 by means of a pair of brackets 111 and 114; the rollers 108 and 109 are aligned with the roller 107; but both are inclined upwards and outwards, according to the nature and required elevation of the band and the material to be transported, said rollers are fixed at their ends, one to the bracket 106a and the bracket 111 and another to the bracket 106 and the bracket 114, through the axes 110 and 113 respectively.

The upper roller assembly 107, 108 and 109 provide the belt in its advance, a channel shape that allows the transportation of bulk material with ease.

However, as you can see, this channel is formed by three straight sections, corresponding to the three rollers that support the band. These three sections involve two zones with abrupt slope change that greatly affects the band and reduces the useful life of the band.

Figure 2 illustrates the assembly of a single roller belt conveyor in isometric. The single roller 20 is supported by its bases 21 and 22. In this case the band 23 fits perfectly to the contour of the roller.

Figure 3 illustrates a front view of a triple roller assembly of one embodiment comprising the teachings of the present invention. Each of the rollers 30, 31 and 32 have a curving which together with the other two, form a larger curvature that the band 31 that is supported on them will adopt. Each of the rollers of this triplet is supported by their respective bases. With this conformation, the band does not require much elasticity to adjust to the upper surface of the load rollers and does not work much to the transverse tension, increasing its useful life.

In this embodiment, both the external rollers 30 and 32, and the central roller 31, have the same curvature, requiring only a single mold for the formation of the tube in its external part, since both the left longitudinal half , as the right longitudinal half have the same conformation in the three rollers.

In this embodiment, the tube of the rollers, and up to the tube together with the lid can be formed in one piece. This structure has advantages and disadvantages. Disadvantages especially in the molding process of the pieces, the removal of a single piece requires a larger mold, and advantages especially in the manufacture of the roller to have fewer parts to assemble.

Figure 4 is a conventional perspective view of the roller forming the triple structure of the present invention. In this view the cover 40 of the roller and the cover 41 can be seen. The cover will rotate together with the tube 42 of the roller, the back cover being fixed, which is placed on the base of the roller to allow the rotation thereof. In this detail of the roller, we can also see a line 43 that we will later point out is the division between the two segments that make up the tube.

When the line 43 is perceived, this figure shows the modality in which the roller tube is formed by two segments. And although it is not indicated, it is possible that each half integrates in a single body half of the tube and the lid.

With this conformation of the binomial lid / back cover, by greatly reducing the surface of the lid and increasing the exposed surface of the back cover, the risk of jamming of the roller by accumulation of dust or transported material, between the base of the roller and the roller is greatly reduced. roll itself.

Figure 5 illustrates a longitudinal section of the roller illustrated in Figure 4, to be able to perceive the internal structure thereof. In the lid 50, in its central area a bearing 50 is housed, in its fixed part. As can be seen in the figure, the lid has a central hole, through which the central projection of the back cover 41 is inserted. On the outer surface of this projection there is, surrounding it, the rotating part of the bearing 50. This central projection of the back cover has a length greater than the width of the bearing, so it has one free end As can be seen in this figure, one of the preferred embodiments of the curved tube of said rollers are formed by two end sections joined by a copy 52. An elongated cylinder 51 in its central part joins the central projections of the backstops. However, the strongest connection, which allows the integrity of the roller even when it is not supported by the bases on a conveyor belt, is a stud 54 that is housed inside the elongated cylinder 51, and at whose ends it is screwed. in respective nuts 53, one at each end, which are drowned at the ends of the backstops, at the level where the bearing 50 is inserted.

Figure 6 illustrates in an exploded view the roller illustrated in Figures 4 and 5 and its relationship with the base on which it is supported. In this illustration it is possible to perceive perfectly the same elements that were marked in figure 5. It is possible to perceive, above all, the internal copy 62 that holds the two halves 60 and 61 of the curved tube of this type of rollers together. You can also see the asparagus 54 that when screwed in the nuts drowned in the backstops. Said nuts are not illustrated to be understood inside the central projection of the backshells 41.

The band, resting on the triple rollers, with curvature on its outer surface, as in the case of the single roller, forms the trough, without sudden deformation slopes, so the band does not require to be very flexible to adjust to the surface on which it rests. Although the triple rollers will not be able to completely eliminate the effect of the spaces between the rollers.

On the other hand, the formed trough is relatively higher than in the case of the straight triple rollers and the quantity of material to be transported per linear meter of a band of the same dimensions can be increased, without said material spilling.

In addition, the band, having no zones of sudden deformation, increases its useful life in an important way, by not generating large efforts on small surfaces.

By understanding the present invention, different ideas can be generated to modify the formed curvature, giving a different curved conformation to the central roller and the lateral ones, being able to form between the three, troughs with parabolic, ellipse, semicircular cross section, among others.

These modalities, although not illustrated, can be inferred from what has been described here. These different sections of tundish would mean rollers of different curved shapes, but would broadly comply with the general objective of not punishing the band with abrupt changes in deformation slopes. Generally the differences of conformation would be between the lateral and central rollers.

The invention has been described sufficiently so that a person with average knowledge in the field can reproduce and obtain the results that we mentioned in the present invention. However, any person skilled in the art who is competent in the present invention may be able to make modifications not described in the present application; however, if for the application of these modifications in a determined structure or in the manufacturing process thereof, the matter claimed in the following claims is required, said structures must be included within the scope of the expiration.

Claims (9)

R E I V I N D I C A C I O N S Having sufficiently described the invention, it is considered as a novelty and therefore the content of the following claim clauses is claimed as property.

1. Triple load rollers, one central and two lateral, for belt conveyor of bulk material, of the type that is placed forming a triplet to support the belt with the material to be transported and to provide it with the shape of trough, and formed by tube, lids lateral and backing, characterized in that the conformation of the external surface of the three rollers, the central and the two lateral, is curved and forming the triplet contribute to the formation in the band, a curved trough of different types parabolic, hyperbolic and of ellipse, among others, and different parameters of these curves, focal length and diameter.

2. Triple load rollers, one central and two lateral, for belt conveyor of bulk material, as claimed in the previous claim, further characterized in that the conformation of the lateral and central rollers have the same curved shape.

3. Triple load rollers, one central and two lateral, for belt conveyor of bulk material, as claimed in claim 1, also characterized in that the conformation of the lateral and central rollers have different curved conformation.

Triple load rollers, one central and two lateral, for belt conveyor of bulk material, as claimed in any of claims 1 to 3, further characterized in that the tube and the roller caps forming the triple are of only one piece.

Triple load rollers, one central and two lateral, for belt conveyor of bulk material, as claimed in any of claims 1 to 3, further characterized in that the tube of the roller forming the triplet is in one piece and the lids are inserted into the tube during assembly.

Triple load rollers, one central and two lateral, for belt conveyor of bulk material, as claimed in any of claims 1 to 3, further characterized by the roller tube forming the triplet is formed by two pieces .

Triple load rollers, one central and two lateral, for belt conveyor of bulk material, as claimed in the preceding claim, further characterized in that each tube half comprises, in a single piece, the corresponding lid.

8. Triple load rollers, one central and two lateral, for conveyor belt material bulk, as claimed in any of claims 6 and 7, characterized in that the roller is kept assembled by means of 10 of a hollow central cylinder fitting tightly at its lateral ends in the central projections of the lids when the roller is assembled.

9. Triple load rollers, one central and two lateral, for 15 belt conveyer of bulk material, as claimed in any of claims 6 and 7, characterized in that the roller is kept assembled by means of an internal central bolt that is screwed between two nuts embedded in the projections of the back covers . twenty 25 R E S U M E N The present invention deals with a roller which, when forming the series of three that normally support at each point of the conveyor, the band, form a channel with curvature without abrupt changes of slope. The advantage of this structure with respect to what already exists is that it makes available a system of three rollers, which provides greater adaptability to the band during its advance to avoid sudden changes in the curve that is torma, avoiding damage and the wear caused to the conveyor belt by the conformation given by the assembly of the traditional rollers and by the space between the rollers of the same tertiary and to avoid a stock of single rollers with different angles and changes of angles in the trough, and avoid having to change a large roller when maintenance requires it. The invention is characterized in that the conformation of the external surface of the three rollers, the central one and the two lateral ones, is curved and when forming the triplet they contribute to the formation in the band, of a curved trough of different types parabolic, hyperbolic and of ellipse, among others, and different parameters of these curves, focal length and diameter.