Fastening system for wear plates by direct welding with oblong holes.

Description

1 / 8 “FASTENING SYSTEM FOR WEAR PLATES BY DIRECT WELDING WITH OBLONG HOLES”. This utility model patent application refers to a "FASTENING SYSTEM FOR WEAR PLATES BY DIRECT WELDING WITH OBLONG HOLES," which aims to provide abrasive lining plates that replace conventional fastening methods using screws, nuts, and washers. Based on the direct welding of the plates to the metal structure of the equipment, the oblong holes on the front of the plates will reduce the workload for assembling the plates because there will be no need for several employees to hold the plates and screws behind the chute or silo structures, which often do not allow access for screwing the plates, making the operation very complicated, time-consuming, and exposing the employee to a confined space. State of the Art 002 It is well known in the art of handling bulk materials where resistance to wear and impact is a major concern, especially in the case of bulk materials with sharp edges and / or high productivities. This is particularly true if said materials further impact the transfer chute / storage chute from a certain height on the inlet side, and when fed from a hopper / conveyor belt, feed the transfer chute / loading silo with a high volume of material, at high speed, vibration and impact. 003 The equipment used in operations in sectors such as mining, rail, steelmaking, sugar mills, and cement plants is subject to intense abrasive wear and impact on structures and wear plates. Petition 870250052935, dated 06 / 24 / 2025, page 6 / 20 2 / 8 004 Therefore, from crushing and transport to the unloading of solids, the equipment involved in the various stages of operations in these industrial sectors receives lining plates. 005 Material discharge units, including transfer chutes, are of great importance in mineral production due to their influence on operating and maintenance costs, as well as concerns for safety, the environment, and employees. 006 Ore transfer chutes are widely used for the continuous transport of solid materials including iron ore, crushed stone, limestone, ore pellets, copper, aluminum, bauxite, granite, coke, sinter, ore slag, etc. 007 The inner walls of the chutes are lined with wear plates. Plates for lining are known in the prior art, which are fixed by screws and stud bolts attached to the front face of the plate where the sheets are fixed. The wear materials applied to the sheets are: high alumina ceramic, tungsten, choke bars, polymers, hard solder. Another drawback is that plates available on the market for this purpose are excessively heavy and come loose due to breakage of the screws / stud bolts caused by impact and high vibration. 008 As is known to those skilled in the art, the internal parts of ore chutes are subjected to intense wear phenomena, such as severe abrasion, high vibration and high impact, compromising the lifespan of the device and causing costly operational interruptions for laborious maintenance and replacements, which increases the cost per ton processed (shipped). 009 The persistent problem is that the solids are launched against the chute wall at high speed, causing intense wear on the welds and... Petition 870250052935, dated 06 / 24 / 2025, page 7 / 20 3 / 8 fastening devices for the cladding panels, causing misalignment and reducing their lifespan. 010 Therefore, from the start-up and transport to the discharge of solids, the equipment involved in the various stages of operations in these industrial sectors receives lining plates. Cast iron alloys and various grades of abrasion-resistant coatings are used in the production of these plates. Wear-resistant steel is widely used in such activities that require high mechanical strength. Therefore, the chute plate is effectively protected and the service life of a chute is greatly extended when using high-quality materials. Patent BR 202016013409-4 refers to a plate for lining an ore transfer chute, characterized by the upper portion (2) having a row (3) of pyramidal tungsten carbide inserts, below this row are located two fixing holes (4) for screw / nut / washer, followed by a perpendicular bar (5) measuring 10x60x390mm, on whose distal end is arranged a row (6) of pyramidal tungsten carbide inserts that projects beyond the edge of the perpendicular bar (7), being superimposed on four support structures (8), followed by a row of pyramidal tungsten carbide inserts (9), below said row are located two fixing holes (10) for screw / nut / washer, followed by a perpendicular bar (11), on whose distal end is arranged a row (12) of tungsten carbide pellets,in a pyramidal shape that projects beyond the edge of the perpendicular bar (13), is being superimposed on four support structures (8), and can be adapted to any transfer chute shape assuming various dimensions. 012 Patent BR 20 2012 026726 3 refers to a partitioned plate (1) characterized by having oblong holes (2) for soldering (3) on its face. Petition 870250052935, dated 06 / 24 / 2025, page 8 / 20 4 / 8 posterior (4), with 3 / 4 - 10x2-1 / 2unc screw with nut and washer (5), horizontal and parallel rows (7) coated with Complex Carbides C, Cr, Nb, W, B and Ti bonded together with pyramidal and rectangular shapes of 240mm length and variable widths from 25mm to 130mm, 700Hb hardness homogeneous with a base thickness of 8.00mm and a coating of 15mm, in order to provide a partitioned plate where the devices and the wear fastening weld are protected from wear resulting from the throwing of solids onto the walls of the ore transfer chute, and is provided with greater resistance to the impact of the throwing of solids, and can be adapted to any chute shape assuming various dimensions. 013 Patent BR 20 2016 013408 6 refers to a plate for lining an ore transfer chute characterized by the ends of the front surface having a row (2) of tungsten carbide inserts, in pyramidal shape, in the center of the plate a row (3) of tungsten carbide inserts is arranged, above and below this row are located, respectively, two fixing holes (4) for screw / nut / washer, and can be adapted to any shape of transfer chute assuming various dimensions. 014 The traditional method involves the use of screws, nuts, washers, or stud bolts. These systems require two operators in opposite positions on the structure, making the process slow, expensive, and in many cases impractical. There is also a risk of fastener breakage during operation, compromising the integrity of the cladding. The model with screws, nuts, and washers requires pneumatic wrenches or electric screwdrivers to screw the plates onto the structures; one operator remains inside the equipment to guide the plates with the screws / stud bolts. 015 The objective of this application is to provide abrasive coating plates that replace conventional fastening methods using screws, nuts and washers. Petition 870250052935, dated 06 / 24 / 2025, page 9 / 20 5 / 8 being based on direct welding of the plates to the metal structure of the equipment, with oblong holes on the front of the plates, there will be a reduction in the working hours for assembling the plates because there will be no need for several employees to hold the plates and screws behind the chute or silo structures, which often do not provide access to screw the plates, making the operation very complicated, time-consuming and exposing the employee to more confined space. 016 The objective of this application is to fix cladding plates in a more efficient, resistant and economical way in chutes, troughs and other equipment subject to abrasion and impact in industrial environments, promoting a reduction in manufacturing costs by eliminating screws and / or stud bolts, nuts and washers, impact wrenches, and assembly time (man-hours). 017 The objective of this application is to position the lining plates directly onto the metal structure (transfer chute, troughs, guides, coke and cement cone), where welding fastening allows a single worker to replace the plates without disassembling the structure or accessing the equipment externally. This increases process speed and significantly reduces labor and operational risks. Furthermore, the absence of mechanical fasteners reduces failures due to bolt breakage, common in high-impact applications. 018 The objective of this application is a fastening system that solves problems related to the complexity and high cost of maintaining wear plates, especially in hard-to-reach locations. It eliminates fastener breakage and the need for multiple operators. It generates operational savings, greater safety, and increased equipment availability. 019 The objective of this application is to provide a device equipped with stud bolts secured by high-performance self-locking nuts, which contributes to the Petition 870250052935, dated 06 / 24 / 2025, page 10 / 20 6 / 8 safety and perfect fixation of the plates in the chutes, preventing them from coming loose and consequent accidents such as belt cutting and crusher breakage. 020 The objective of this application is a fastening system that promotes reduced labor (only one operator is needed); decreased fastener costs; greater impact resistance, preventing common screw breakages; elimination of the need to disassemble the structure for maintenance; less downtime and increased productivity. 021 In order to obtain a perfect understanding of what has been developed, illustrative drawings are appended to which numerical references are made together with a detailed description that follows, where: Figure 1 shows a front perspective view of the plate. Figure 2 shows a rear perspective view of the plate. Figure 3 shows an exploded perspective view of the plate. Figure 4 shows a perspective view of the base plate highlighting the oblong holes. 022 As can be inferred from the drawings and their details, we can verify that the “FASTENING SYSTEM FOR WEAR PLATES BY DIRECT WELDING WITH OBLONG HOLES” comprising a wear plate (1) a base plate (2), provided in its central transverse section (3) and in its upper (4) and lower (5) longitudinal sections, with rows of pyramidal shaped inserts (6) made of Chocky Bar bars cast in white iron with a hardness of 720hb, tungsten bars, high alumina ceramic plates, fixed by welding, characterized by the base plate (2) being provided with oblong holes (7) positioned transversely, between the rows of pyramidal shaped inserts (6) positioned vertically. 023 Based on the description, we can verify that the “FASTENING SYSTEM FOR WEAR PLATES BY DIRECT WELDING Petition 870250052935, dated 06 / 24 / 2025, page 11 / 20 7 / 8 "WITH OBLONG HOLES" offers enormous advantages, as the lining plates are positioned directly onto the metal structure (transfer chute, troughs, guides, coke and cement cone). Welding fastening allows a single employee to replace the plates, without the need to disassemble the structure or access the equipment from outside. 024 This increases the speed of the process and significantly reduces labor and operational risks. The absence of mechanical fasteners also reduces failures due to screw breakage, which are common in high-impact applications. 025 The system completely eliminates the need for mechanical fasteners (screws, nuts, washers), using welding as the exclusive fastening method. This represents a significant change from traditional methods, providing reduced labor, faster maintenance, greater safety, and greater impact resistance. 026 Solves problems related to the complexity and high cost of maintaining wear plates, especially in hard-to-reach locations. Eliminates fastener breakage and the need for multiple operators. Generates operational savings, greater safety, and increased equipment availability. 027 Completely eliminates the traditional method involving the use of screws, nuts, washers, or stud bolts, requiring two operators in opposite positions on the structure, which makes the process slow, expensive, and in many cases impractical, in addition to the risk of fastener breakage during operation, compromising the integrity of the cladding. Thus, the model currently used with screws, nuts, and washers requires pneumatic wrenches or electric screwdrivers to screw the plates onto the structures, with one operator inside the equipment to guide the plates with the screws / stud bolts. Petition 870250052935, dated 06 / 24 / 2025, p. 12 / 20

Claims

1 / 1 CLAIMS 1- “FASTENING SYSTEM FOR WEAR PLATES BY DIRECT WELDING WITH OBLONG HOLES” comprising a wear plate (1) a base plate (2), provided in its central transverse section (3) and in its upper (4) and lower (5) longitudinal sections, with rows of pyramidal shaped inserts (6) made of Chocky Bar bars cast in white iron with a hardness of 720hb, tungsten bars, high alumina ceramic plates, fixed by welding, characterized by the base plate (2) being provided with oblong holes (7) positioned transversely, between the rows of pyramidal shaped inserts (6) positioned vertically. Petition 870250052935, dated 06 / 24 / 2025, page 14 / 20

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