Model: DB-21120-180.
Nominal Breaking Load: 210 kN.
Material: Hot-dip galvanized steel.
Weight: 7.4 kg.
Adjustment Range: Five length adjustment levels (L1-L5) are achieved by combining the "0" hole with the "1-5" holes.
Application: Suitable for 110 kV and above transmission line projects, commonly used for tension string or split conductor connections.
The DB-21120-180 Adjusting plate has a breaking load of 180 kN and is suitable for lines of voltage levels 220 kV and below. It features an adjustment range of ±50 mm and 21 sets of M16 bolt holes for fine adjustment, meeting the tension requirements of insulator strings or conductors caused by thermal expansion and contraction, as well as installation errors.
The DB-21120-180 Adjusting plate has a breaking load of 180 kN and is suitable for lines of voltage levels 220 kV and below. It features an adjustment range of ±50 mm and 21 sets of M16 bolt holes for fine adjustment, meeting the tension requirements of insulator strings or conductors caused by thermal expansion and contraction, as well as installation errors. The DB-21120-180 Adjusting plate has detailed specifications: total length 1610 mm, width 30 mm, thickness 8 mm, hole diameter 17 mm, and hole spacing 5 mm. These specifications distinguish it from other adjustment plate models in terms of structure and performance, making it easier for users to choose.
How can I determine if the purchased DB-21120-180 Adjusting plate meets my requirements? Let's first review the national standards:
GB/T 2328-2019
Specifies the technical requirements, test methods, and dimensional tolerances for adjustment plates, applicable to mechanical property verification;
01
GB/T 16927.1-2021
Clarifies the insulation clearance design standards for hardware in high-altitude areas;
02
DL/T 759-2023
Specifies the classification, technical requirements, and test methods for connection hardware, as well as the rated breaking load and bolt hole design;
03
Q/GDW 11758-2024
Requirements for corona control, conductive paste coating, and nano-coating in UHV applications.
04
With this understanding, you can now produce the DB-21120-180 Adjusting plate with a reliable basis.
Proper installation of the DB-21120-180 Adjusting plate can achieve twice the result with half the effort. We're sure there are first-time users out there, so here's a detailed guide:
Preparation
Ensure the adjustment plate, tension clamp, insulator string, parallel hanger, and pre-twisted wire tension fittings are complete and undamaged. Inspect the surface of each component to ensure quality.
Environmental Safety
Clean the installation area to ensure it is dry and dust-free. Avoid contact between the adjustment plate and corrosive materials. Verify that the installation environment is compatible with the selected model.
Positioning and Connection
Place the adjustment plate between the insulator string and tension clamp and secure with bolts.
Hole Spacing
Select the appropriate hole spacing based on actual needs and tighten the U-shaped screws with a wrench.
Jointing
Continuously jog the overlapping edges to ensure a smooth, crack-free surface. The overlapping surfaces must be clean and dry.
Inspection
Tighten all bolts and pins, re-measure the sag at the cross-over point, and ensure safe operation of the equipment.
Analysis of common faults with the DB-21120-180 Adjusting plate during use:
Hole pitch deformation
Loose adjustment holes lead to tension imbalance and abnormal displacement. This may indicate overload. Replace the adjustment plate with one that meets the appropriate load requirements.
Anti-corrosion coating failure
Peeling of the hot-dip galvanized layer may be caused by long-term exposure to a highly corrosive environment. For highly corrosive environments, a thicker zinc coating should be used throughout the entire process to extend the service life.
Failures with the DB-21120-180 Adjusting plate must be taken seriously. Small problems can lead to significant problems. Prompt detection and repair can help prevent further damage.
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