AU2017338802B2

AU2017338802B2 - Combination impact assembly

Info

Publication number: AU2017338802B2
Application number: AU2017338802A
Authority: AU
Inventors: Franklin AGUIAR
Original assignee: Pur Equipamentos Ind Ltda
Current assignee: Pur Equipamentos Industriais Ltda
Priority date: 2016-10-05
Filing date: 2017-10-05
Publication date: 2023-06-15
Anticipated expiration: 2037-10-05
Also published as: AU2017338802A1; BR102016023204A2; WO2018064739A1; CL2019000913A1

Abstract

The present patent of invention is applicable to industrial sectors that use belt systems to transport ore and other materials, combining absorption of any level of impact and conveyor belt speed, there being an impact system that concomitantly uses in its assembly trestle structures with impact tracks and trestle structures with impact rollers, which are to be installed alternately and with a slight difference in level between them perpendicularly to the belt conveyor at loading and transfer points, providing stability for the material transported without compromising the metal structure at these points, promoting absorption of the shock resulting from an impact and moving the belt without heating up.

Description

"MIXED ASSEMBLY OF IMPACT"

[0001] The present patent application is applicable to mining, iron and steel, and port sectors, and other industrial sectors using belt systems for conveying ore, pellets, coal and other ores associating any level of impact absorption and speed of conveyor belts. The mixed assembly of impact is an impact system simultaneously using trestles having impact tracks and trestles having impact rollers for its assembly, which are to be installed in an alternate manner and slightly uneven between them, perpendicular to the belt conveyor in the loading and transfer points, generating stability of the conveyed material, prejudicing not the metallic structure at these points, promoting absorption of the shock resulting from de impact, and conveying the belt producing not heating.

[0002] The trestles having impact tracks are made of ultra-high molecular weight polyethylene, and other plastic engineering having similar physical chemical features, over elastomer-coated cushion, and by elastomer-coated trestles having impact rollers.

[0003] Currently the metallic structures of chutes, silos, and gutters of belt conveyors for bulk materials are highly mechanically demanded, the discharge points being the place where most of damages occurs due to high levels of impact.

[0004] In order to reduce the maintenance of these metallic structures, there are three types of devices for impact absorption, all of them individually using: impact cradles, which is the oldest and conventional device formed by polyethylene longitudinal wear bars having rubber cushions, being part of tracks positioned in the central and lateral areas of support for conveyor belt; trestles having impact rollers, formed by rotating rollers with a segmented high and low relief coating which are positioned near one another in order to form a movable surface in the central and lateral areas to enable conveying the belt without friction; and the impact cradle in the sides, and impact rollers in the middle of the belt:

[0005] The impact cradles offer high resistance to impact in the central part and possible sealing application in the sides of the belt conveyor. However, they cannot be applicable to high-speed belts, since the friction contact under constant pressure with longitudinal bars generates over-heating and combustion of the conveyor belt.

[0006] The trestles, being rotating devices, have the advantage of being installed in conveyors of any speed. In spite of the vicinity, the cylindrical shape of the rollers forms ridges and furrows among them, and when absorbing more severe impacts, the useful life of the belt and the rollers in the central position is reduced, since the instant impact is concentrated in the ridge of the cylindrical rollers generating warpage in the shafts of the rollers and promoting small cuts in the belt. Additionally, in the lateral positions, the furrows formed between rollers make it impossible to seal the sides of the conveyor belt.

[0007] The impact cradles in the sides and impact rollers in the middle of the belt have the benefit of the longitudinal bars presence for sealing the side of the belt, and the possibility of installation on conveyors of any speed, but in more severe impacts, it presents a reduction of central rollers and conveyor belt useful life.

[0008] In consideration of the inconveniences mentioned above, the Mixed Assembly of Impact was developed, which consists of trestles of impact roller, slightly raised in the center and sides flush with trestles of impact tracks, supported by cushion absorption bases, resulting in a sequence of a trestle having impact rollers followed by a trestle with impact tracks, followed by another trestle with impact rollers, and so on.

[0009] It will be appreciated that a midline of the conveyor locates on conveyor support portions of the impact rollers, and in general the midline of the conveyor locates slightly above conveyor support portions of the impact tracks.

[0010] At the instant moment of impact, the center rollers will always be at a greater height than the central impact track. In this sense, the rollers function only as a first impact reducer, as the slight uneven transfers the greater impact force to the cushion tracks, thereby relieving the roller shaft. Thus, during the instant impact, the initial strain of the roller rubber is minimal since the track will be a few millimeters below, which has an excellent distribution of the forces generated by the impact on a flat surface. After the distribution, the forces are absorbed by the cushion elastomer arranged below the track. Consequently, during the instantaneous impact, the roller, despite receiving the first contact, is not the main impact absorption device, and in the moment after the instant impact the rubber of the roller returns to its original size and from this moment the rollers perform the transport function of the material by rotating device, with little or no contact with the impact tracks.

[0011] Despite the reduction in impact provided by the rollers, the central tracks having cushions are responsible for receiving the greatest load of instant impact. Once the absorption function of most of the impact is achieved, the tracks are no longer required. On the sides, the tracks will have a proper sealing function, since the impact requirement in these positions is very small, the tendency is that, if rollers are chosen, they will suffer a gradual reduction of the leveling until the sealing points of tracks are even, the furrows not existing for the passage of material.

[0012] The Mixed Assembly of Impact can be installed in configurations that vary the number of impact tracks for each trestle having impact roller, followed by a trestle having impact roller, and so on. Another option of assembly is alternately applying the impact rollers and tracks sequentially only to the central part and impact tracks over the side, to optimize sealing at these points. The configurations of this new alternate mixed impact system will prioritize the using life of the equipment associated with the need to reduce impact, but without disregarding the limitations imposed by the need for sealing, influences of the speed of the conveyor belt, keeping a working temperature without risk of combustion.

[0013] Among the advantages presented, the mixed alternate impact system takes advantage of the high impact capacity of the tracks and transfers the friction caused by high speeds to the impact rollers, which are rotating devices more suitable for the conveyance of the belt. The Mixed Assembly of Impact can be configured for any speed or load capacity of belt conveyors.

[0014] As the surface is flat, the forces during the instantaneous impact are better distributed, favoring the using life of the Mixed Assembly of Impact and the conveyor belt. With the application of the Mixed Assembly of Impact, there is no overheating of the belt, as the friction of the track is reduced by the impact rollers support at the moment after the material falls. As the device maintains the lateral support surface of the belt flat and even, it favors the application of lateral seals over the discharging points of the conveyors.

[0015] The fact of the impact roller trestles in the center of the belt being installed slightly uneven above the impact tracks, they provide the belt with at any speed with a slip at the lowest possible friction. The assembly operates using the best condition of the tracks in the shock absorption resulting from the impact and the best efficiency of the rotating rollers, avoiding friction at any conveyor speed.

[0016] Trestles having impact tracks made of modules of impact tracks supported by modular cushion bases, absorb the most part of the impact, and help the sides to level the belt surface, contributing to an excellent lateral seal.

[0017] The trestles of impact rollers, besides absorbing a small part of the instant impact, they have the function of transporting the belt, regardless the speed of the conveyor.

[0018] The configuration of alternating trestles having impact rails and trestles having impact roller slightly uneven in the middle point of the conveyor does not allow the belt to overheat since the friction of the track against the belt is reduced by the support of the impact rollers at the next moment to the fall of the material.

[0019] The material used in the present patent is consisted of trestles having impact tracks in ultra-high molecular weight polyethylene (or other plastic engineering having similar physical-chemical features) over elastomer-coated cushion, and by elastomer-coated trestles having impact rollers, configured to be installed in an alternate manner between them, and perpendicular to the conveyor, promoting impact absorption and conveying the belt producing not heating.

[0020] The modules of impact tracks, as well as the modular cushion bases, have a tongue-and-groove type fitting that facilitates to perform track replacements in case of wear, without having to replace the cushions.

[0021] The mixed assembly of impact may be seen in the appended figures, wherein:

[0022] The Figure 1 illustrates a perspective view of the mixed assembly of impact installed on the conveyor.

[0023] The Figure 2 illustrates a perspective view of the trestle having impact tracks.

[0024] The Figure 3 illustrates a perspective view of the trestle having impact rollers.

[0025] The Figure 4 illustrates a front view of the sequence of trestles of the assembly.

[0026] The Figure 5 illustrates a perspective view of the mixed assembly of impact installed on the lateral sealed conveyor.

[0027] Figures 6 and 7 illustrate a front view of the trestles of the assembly during use.

[0028] According to the Figure 1, the mixed assembly of impact (1) is constituted of trestles having impact tracks (2) and trestles having impact rollers (3), simultaneously installed, in an alternate manner and perpendicular to the conveyor equipment under the belt (5).

[0029] According to the Figure 2, the trestle having impact tracks (2) is formed by the impact track modules (2.1) fitted to and supported by the cushion modular bases (2.2) which, in turn, are fitted to the racks (2.3 and 2.4) that are over the metallic profile base (2.6) and are attached to it through the locking system (2.5), which may use pins, washers and cotter pins or screws having washers and nuts; it also has stroke limit (2.7) and base fixing shoe (2.8); both the modules of impact tracks (2.1) and the cushion modular bases (2.2) have a tongue-and-groove type fitting (2.9) facilitating to replace the tracks, in case of wear, without having to replace the cushions.

[0030] According to Figure 3, the trestle having impact rollers (3) is formed by the impact rollers (3.1) which are directly fitted and locked on the roller supports (3.2 and 3.3) which are on the metallic profile base (2.6) and are attached to it through a locking system (2.5) which can have pins, washers and cotter pins, or screws having washers and nuts also has a stroke limit (2.7) and a base fixing shoe (2.8).

[0031] According to Figure 4, the slight uneven in positioning height, shown through the distance ("A"), of the trestles having impact rollers (3) with respect to the trestle having impact tracks (2) provides the belt (5), at any speed, with a sliding having the least possible friction and using the best condition of the tracks in the absorption of the shock resulting from the impact and the best efficiency of the rollers (3.1) in the conveyor speed transfer.

[0032] According to Figure 5, the Mixed Assembly of Impact (1) presents an alternate impact system configured to be installed perpendicular to the conveyor by alternating between trestles having impact tracks (2) and trestles having impact rollers (3), slightly uneven in the positioning position between them, promoting the absorption of impact at any speed or loadability of belt conveyors, supporting the leveling of the belt surface 5 and contributing to the improvement of efficiency of the lateral seals 4.

[0033] Installed slightly uneven above the impact tracks, the central trestles having impact rollers (3) will reduce the friction of the belt (5) with the impact tracks (2), causing the belt (5) to continuously operate in a normal way, even at high speeds.

[0034] For being consisted of independent trestles having tracks (2) and trestles having roller (3), the Mixed Assembly of Impact can be standardized with the exact required surface area of the impact area, as well as being configured with the desired alternation of trestles (2 and 3).

[0035] Modifications and variations as would be apparent to a skilled addressee are deemed to be within the scope of the present invention.

Claims

Claims 1. An impact absorbing supporting assembly for conveyors, the supporting assembly having a plurality of track modules and a plurality of roller modules, the supporting assembly being formed by alternating track modules and roller modules under a conveyor belt, the modules being perpendicular to the conveyor, the modules having conveyer support portions located beneath a midline of the conveyor wherein the conveyor support portions of the impact roller modules beneath the midline of the conveyor are positioned higher than the conveyor support portions of the track modules beneath the midline of the conveyor, such that in use when the conveyor is unloaded a gap (A) is created between the midline of the conveyor and the conveyor support portions of the track modules beneath the midline of the conveyor.
2. An impact absorbing assembly for conveyors as claimed in claim 1, wherein impact track modules (2.1) are fixed to cushion modular bases (2.2) through tongue-and-groove type fittings (2.9).

PUR EQUIPAMENTOS INDUSTRIALS LTDA By its Patent Attorneys ARMOUR IP

P2317AUOO