Three-hole yoke plates are a common type of electrical fitting. They have a triangular structure and are widely used in power transmission lines for connection and fixation. A detailed description follows:
| parameter | content |
| structure | The triangular structure features three holes, the spacing between which and the thickness of the sheet metal can be customized to suit specific working conditions. These holes are used for inserting connectors, ensuring a secure connection with components such as insulator strings and conductor clamps. Slight variations in hole diameter may exist for some products to accommodate different connector specifications. |
| Material | Ductile iron or steel is typically used, and hot-dip galvanizing is applied to improve corrosion resistance and service life to meet the harsh environment of long-term outdoor use of power transmission lines. In some high-requirement scenarios, high-strength alloy steel is selected to enhance load-bearing capacity. |
| performance | With strong load-bearing capacity, the rated destructive load of the three-hole yoke plate varies depending on the model, ranging from 100 to 600 kN. Some products suitable for high-voltage scenarios have an ultimate strength of up to 60,000 pounds, which can stably withstand the tension of the conductors in the transmission line and the load brought by the external environment. |
| Specification | With a variety of specifications, different specifications of products can meet different load and installation size requirements, and can be customized. |
The three-hole yoke plate adopts an integrated forging structure with no welding on the surface, ensuring the consistency of the overall mechanics. The three connecting holes are arranged symmetrically, and the center of the holes are connected to form an equilateral or isosceles triangle, ensuring that the load is evenly distributed when subjected to forces in multiple directions, thereby reducing local stress concentration.Attentive users will notice that the hole walls are precision machined, smooth and burr-free, with the hole diameter tolerance controlled within ±0.02mm. This ensures precise fit with bolts, pins, and other connecting parts, reducing wear and vibration caused by assembly gaps. The edges are designed with rounded transitions to avoid stress concentration caused by sharp corners, reducing risks during installation and use.
Proper installation of the three-hole yoke plate can achieve twice the result with half the effort, and its simple and convenient installation also improves the work efficiency of construction workers.
Preparation
Before installation, the appearance of the three-hole yoke plate should be inspected to ensure that there are no defects such as deformation, cracks, or rust on the surface. The model, load and actual working conditions should also be checked to avoid overloading. The installation surface should also be checked to ensure that it is flat, clean and free of oil to avoid uneven stress,Select matching bolts and pins to ensure a secure connection and prevent loosening.
Install
When installing a three-hole yoke plate, avoid using hard objects such as hammers to strike it, so as to avoid structural damage. When connecting the holes, ensure that the connectors are in full contact with the hole walls and do not force the assembly. When connecting, ensure that the force on each connection point is balanced and avoid a single connection point bearing excessive load. Each installation process should be checked and attention should be paid to details.
Maintenance and upkeep
During long-term use, regular maintenance and upkeep are necessary, including checking for rust on the exterior and loose connections. Repair any issues promptly. If the surface is rusted, use sandpaper to polish it. If the connections are loose, tighten the bolts, pins, and other connecting parts. If the product is severely deformed, cracked, or has reached the end of its service life, it should be replaced immediately.
As a professional manufacturer of three-hole yoke plates, we are committed to being responsible to our users, ensuring that every customer can purchase high-quality yoke plate products. Through leading technology, our products possess core competitiveness, primarily reflected in the following aspects:
High strength
The integrated forging process results in a denser structure, free from internal defects such as pores and cracks. The tensile load-bearing capacity can be increased by more than 30%, and it will not deform even when subjected to an overload impact of 1.5 times the rated load. It is not prone to fatigue damage during long-term use, while ensuring the stability and safety of the power construction process.
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High precision
Precise control of hole position accuracy, flatness, and perpendicularity is our company's core competitiveness. During production, we require hole diameter tolerance ≤ ±0.02mm and hole spacing tolerance ≤ ±0.1mm. It can be accurately adapted when connected with different standard connectors. The product specifications are complete, with hole diameter range of 12mm-50mm and plate thickness of 8mm-30mm. Custom production is also available.
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Hot-dip galvanizing
Many cheap three-hole yoke plates on the market are also corrosion resistant, but they use electro-galvanizing, and the zinc layer on the surface is very thin. They cannot be used for a long time or in harsh environments. Our company uses hot-dip galvanizing, and the zinc layer is ≥85μm thick. It will not be corroded for 5-10 years in outdoor and humid environments.
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Global Demand
In developing countries such as Southeast Asia, Africa, and Latin America, there is a surge in 110kV-500kV high-voltage transmission line projects. In these regions, high-quality power fittings are chosen to ensure stability. The three-hole yoke plate, as a core connection and load-bearing component, is indispensable. In addition, with its material and surface treatment options, it can be perfectly matched to complex outdoor environments.
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