Structure and Adjustment Principle
Unlike the DB type adjusting plate, the PT type adjusting plate uses a center bolt sliding adjustment structure. The overall connection length is adjusted by sliding the center bolt along the elongated hole. Bolt connection holes are located at both ends of the plate, with an adjusting screw and a locking screw in the middle. Once adjusted to the correct position, tightening these screws secures the length and prevents displacement during operation. The overall structure is simple and can be adjusted on-site without special tools.
During production, the specifications of PT type adjusting plate strictly adhere to international standards and comply with core specifications of the power industry. Specific parameters and specifications are as follows:
| model | Rated breaking load (kN) | Compatible voltage levels | Adjustment range (mm) | Total length (mm) | Aperture (mm) | Material |
| PT-7 | 70 | 100kV-220kV | ±30 | 280±5 | 18 | Q235B/35# steel |
| PT-10 | 100 | 100kV-220kV | ±40 | 320±5 | 22 | Q235B/35# steel |
| PT-16 | 160 | 220kV-330kV | ±50 | 380±5 | 26 | 35# steel / 45# steel |
| PT-20 | 200 | 220kV-500kV | ±60 | 420±5 | 30 | 35# steel / 45# steel |
| PT-30 | 300 | 330kV-500kV | ±80 | 500±5 | 39 | 45# steel / alloy structural steel |
| PT-40 | 400 | 500kV UHV | ±100 | 580±5 | 45 | Alloy structural steel |
Core Product Advantages
1.High-Precision Thread Adjustment: Thread grinding achieves a precision of grade 5-6, with a surface roughness of 0.08-1.25μm, ensuring smooth adjustment and secure locking.
2.Excellent Corrosion Resistance: Hot-dip galvanized layer thickness ≥85μm, conforming to ISO 1461 standard, salt spray test ≥1000 hours, providing long-term rust prevention in high-humidity coastal environments.
3.Stable Mechanical Properties: PT Type Adjusting Plate tensile strength ≥470MPa, yield strength ≥235MPa, elongation ≥21%, ensuring long-term stability under load.
4.Wide Temperature and Weather Resistance: Operating temperature -40℃~+80℃, withstands wind speeds of 35m/s and 20mm icing, adaptable to harsh weather conditions.
5.Complete Standard Specifications: Covers the entire PT-7 to PT-40 series, suitable for applications ranging from 100kV distribution to 500kV UHV.
Execution Standard
·Product Standard: GB/T 5075-2016 National Standards for Power Fittings
·Zinc Plating Standard: ISO 1461 Hot-Dip Galvanizing International Standard
·Thread Accuracy: Grade 5-6 ground threads
Application Scenarios
1.Tension Tower Double-String Adjustment: Fine adjustment of the length of double insulator strings on angle towers and terminal towers to balance forces on both sides and compensate for construction deviations.
2.Tower Fitting Connection: Connected in series with insulator strings or installed on tension towers to absorb installation dimensional errors.
3.Urban and Rural Power Grid Construction: Adaptable to diverse line routes in complex erection environments, reducing rework caused by dimensional deviations.
4.Special Environment Lines: Hot-dip galvanizing ensures long-term stable operation in corrosive environments such as coastal areas, industrial areas, and high-humidity mountainous areas.
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Customization Services
We support customized production according to customer needs. Customizable items include: rated load level, adjustment range length, material selection, surface treatment process, etc. When selecting a model, please provide parameters such as applicable voltage level, line design load, and installation conditions. We will match or develop corresponding specifications based on the actual application scenario.
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