Turbine manhole cover

Turbine manhole coverThe name comes from its unique appearance: the base (well ring) of the manhole cover has a reinforcing rib structure resembling a car turbine or gear. These "turbine" shaped protrusions are not only reinforcing, but also a key part of their anti settling function.

Core characteristics and working principle of turbine manhole cover

1. Anti settlement design (core advantage)

Traditional manhole cover problem: Ordinary manhole covers are placed directly on the wellhead. When the surrounding road surface is crushed and sunk by vehicles for a long time, the manhole cover will become protruding and become the "belly button", causing bumps and noise when vehicles pass by.

● Turbine manhole cover solution: It adopts a "plug-in" structure. The base of the manhole cover has a wide edge (wide edge), which will support the base of the road surface during installation, rather than pressing on the soft wellbore. When the vehicle passes by, most of the load is directly dispersed into the sturdy road structure layer through this wide edge, thus avoiding the sinking of the manhole cover itself.

2. The role of the "turbine" structure

Anchor effect: The "turbine" shaped reinforcing bars on the base will be tightly wrapped by paving materials such as asphalt concrete during installation, like countless small anchor points, firmly "locking" the entire manhole cover base in the road surface, preventing it from shifting and rotating.

● Enhance bearing capacity: These reinforcing bars greatly increase the rigidity and strength of the base, enabling it to better distribute loads from vehicles.

3. Other advantages

Flexible locking: Three point spring arm locking or concealed hinge connection is usually used between the manhole cover and the base, which can ensure that the manhole cover will not jump or be stolen, and is easy to open for maintenance.

Good sealing: usually equipped with rubber shock absorbers and water stop rubber strips, it can reduce the noise of vehicles passing by and effectively prevent groundwater leakage and road sewage from flowing into inspection wells.

High strength and durability: Usually made of ductile iron, it has high strength and good toughness, and is more durable than ordinary gray cast iron manhole covers.