I.Core Function: The Precision Micro-Adjustment Hub of Manhole Systems
1.3D Leveling Revolution
- 50mm adjustable height: Combines sidewall geared tracks (0.5mm precision) with adjustment bolts for ±25mm stepless elevation correction, eradicating protrusions/sags from shaft construction errors.
- Auto-level compensation: Liquid suspension level provides real-time tilt feedback during bolt rotation, ensuring ≤0.3° cover-road angle.
2.Load Transfer Optimization
Tapered diffusion design: 690×890mm top for cover seating expands to 750×950mm base, dispersing pressure to shaft walls. Reduces shaft stress by 30%, suppressing settlement at its root.
II.Five Battlefield Advantages: Guardian of Road Smoothness
1.Eliminate "Cover Bounce"
- Three-tier adjustment matches asphalt paving depths, keeping covers 0–5mm below road surface—zero vehicle impact.
- Highway toll tests show 12dB noise reduction post-installation.
2.End "Peri-Cover Edge Rot"
- Rubber seal groove + reverse-slope ring design blocks 99% rainwater from seeping into subgrade.
- Five-year use in rainy cities reduces road cracking around covers by 90%.
3.Settlement-Proof Skeleton
- 50mm ductile iron base + radial ribs withstands >40-ton loads, engineered to resist roller impact.
- Bolt-hardened to shaft eliminates ring sinking from traditional mortar fixation.
4.30-Second Lightning Installation
- Pre-assembled ring/cover hoisted as one unit; leveled during concrete pour. Single worker completes in 30 seconds (vs. 30 minutes traditionally).
- Four-way anchor claws with leveler slots limit installation error to ≤1°.
5.-30°C Ice-Fire Warrior
- Ductile iron resists freeze-thaw cycles—survives three -30°C disassemblies without cracking.
- Thermal-sprayed zinc coating endures 150°C asphalt paving heat, lasting 30 years.
III.Construction Mastery: The Millimeter Artistry of Veterans
1.Precision Embedding Quad-Step
- Dig: Excavate 10cm wider than ring’s outer edge.
- Hoist: Lower pre-assembled ring/cover unit.
- Adjust: Rotate ring to select tier; laser-level calibrate.
- Lock: Diagonal-tighten bolts at ≥120N·m torque.
2.Waterproofing Golden Rule
- Seal joints: 45°-angled adhesive bonding for rubber gaskets eliminates leakage.
- Fill ring-shaft gaps with non-shrink grout (hardness > C40 concrete post-cure).
3.Asphalt Fusion Secrets
- Apply bitumen bonding agent to ring surface pre-paving.
- Manually clear overflow around ring during 140°C initial compaction—ensures seamless integration.
IV.Irreplaceable Battlefields
- 1. Road Overhauls: Bridges new/old asphalt layer gaps, eliminating shaft reconstruction.
- 2. Soft Soil Sections: Hard-connection resists differential settlement, curing "wavy roads".
- 3. Highway Toll Plazas: Precision leveling protects weighing equipment from vibration.
- 4. Smart Cover Upgrades: Pre-embedded sensor conduits enable IoT retrofits.
- 5. Arctic Zones: Matches asphalt’s thermal expansion coefficient—maintains seal at -30°C.
Vs. Concrete Adjusting Rings: Ductile iron rings deliver 3× higher load capacity, 60× faster leveling, and 200% longer lifespan—an essential necessity for modern efficient construction!
