Galvanized triangular yoke plates are triangular connectors made of metal sheets through stamping, bending, welding, and galvanizing. The triangle is the most stable geometric structure in nature; when subjected to external forces, the three sides restrain each other, effectively preventing structural deformation or displacement by dispersing stress. Compared to yoke plates of other shapes, triangular yoke plates are more suitable for multi-branch connection scenarios, especially in transmission lines. They can form a stable closed-loop force distribution when the main line needs to branch, insulator strings need to be connected to tower crossarms, or multiple cables need to be connected, solving problems of uneven stress and limited connection direction.
Connecting holes are a key structural element in galvanized triangular yoke plates, enabling component connections. They are typically located at the three vertices, and their design adheres to the principle of equidistant force distribution. The hole diameter precisely matches that of fasteners such as bolts and pins, ensuring a tight and stable connection during use. The connecting holes are machined using CNC punching technology, with diameter tolerances controlled within ±0.2mm. In high-end applications, the connecting holes are further beveled to enhance installation convenience and structural integrity.
Reinforcing ribs are an indispensable part of galvanized triangular yoke plates. Their use enhances the yoke plate's resistance to bending and deformation, especially for large-sized, heavy-load yoke plates. Adding reinforcing ribs to the back or sides improves overall performance. During production, the reinforcing ribs are made of the same material as the yoke plate, welded or integrally stamped, and distributed along the centerline of the triangle or the direction of stress, forming a composite load-bearing structure of "main plate + reinforcing ribs." During use, the reinforcing ribs disperse localized stress on the main plate, ensuring the load is evenly distributed across the entire plate surface, preventing deformation or breakage due to excessive stress at a single point. Our tests show that galvanized triangular yoke plates with added reinforcing ribs exhibit a 30% increase in bending strength, making them suitable for harsh environments with high wind speeds and heavy loads.
The corrosion resistance, structural strength, and ease of installation of galvanized triangular yoke plates give them a significant advantage in the global market. Below, we will introduce them in detail:
Corrosion resistance
Hot-dip galvanizing is a very effective anti-corrosion process. The zinc layer can isolate the substrate from corrosive media such as air, moisture, acids, alkalis, and salts, thus achieving long-term corrosion protection,During the hot-dip galvanizing process, zinc and iron undergo a metallurgical reaction, and the zinc-iron alloy layer is tightly bonded to the substrate with an adhesion of over 70 N/mm². It is not easy to peel off or flake, and it can cover all surfaces of the yoke plate, avoiding localized weak corrosion resistance.
Structural strength
The design achieves high strength and high stability load-bearing capacity through high-quality base material + triangular structure + reinforced design. The high-quality base material can withstand the long-term effects of cable tension, equipment weight and external loads without the risk of plastic deformation. The one-piece stamping production process avoids defects such as porosity and cracks generated during welding, resulting in stronger structural integrity, which can greatly reduce the risk of breakage and reduce the frequency of maintenance.
Easy installation
The connection hole positions are designed according to industry standards and are fully compatible with the dimensions of conventional hardware and fasteners. No on-site drilling or modification is required during installation; it can be fixed directly with bolts. Small space occupation: The triangular structure design ensures that it will not take up too much space after installation, making it especially suitable for scenarios with dense cables and limited installation space.
To ensure the superior performance of galvanized triangular yoke plates, strict quality control is implemented throughout the entire production process. From raw material procurement to forming and punching, and then to surface treatment, every step follows international standards to ensure stable and reliable quality.
Raw material inspection
The performance of raw materials is the foundation of yoke plate quality. The steel plates are selected from well-known steel mills. Each batch of raw materials is provided with a material certificate and undergoes multiple tests, including tensile strength, yield strength, and chemical composition. Only qualified materials can be put into production. According to the specifications required by the customer, the raw materials are cut to ensure that the side length and angle meet the design requirements.
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Punching process
Punch holes precisely according to the hole positions and diameters on the design drawings. Punching with a CNC punch press is not only fast but also highly accurate. For large-diameter or thick plates, step-by-step punching can also be selected. After punching, chamfering is performed to remove burrs and sharp corners, which can avoid scratching the cables. Then, the surface of the yoke plate is derusted and degreased to lay a good foundation.
02
Welding process
Welding materials are selected with welding rods that match the base material. Welding current, voltage, welding speed and other parameters are precisely controlled by computer to ensure that the weld is full, free of porosity and cracks, and to remove welding slag and spatter, so that the weld and the main board surface are smoothly transitioned, thereby improving structural strength and appearance quality. Anti-corrosion process is applied to the surface in accordance with hot-dip galvanizing standards such as GB/T 13912, thereby improving the corrosion resistance and wear resistance of the yoke plate.
03
Quality inspection
Using equipment such as vernier calipers, angle gauges, and projectors, the dimensional parameters such as side length, thickness, hole diameter, hole position, and angle are inspected to ensure that they meet the design requirements. Randomly selected samples are tested for tensile strength, yield strength, and bending strength. The testing standards comply with GB/T 228.1 and GB/T 232. The product surface is visually inspected for defects such as cracks, pores, zinc nodules, and burrs. A smooth appearance without obvious defects is considered qualified.
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