Square manhole cover has many advantages of natural anti-theft, beautiful (arbitrary coloring, lettering), environmental protection without rust, wear resistance, no noise, strong pressure bearing, strong weather resistance, convenient installation, long service life, light weight and so on.
Inspection manhole cover have several heavy duty, heavy, light and ultra-light. It is widely used in municipal roads, real estate, communication, water and chemical industry, gas, fire fighting, school runway, garden, community, square, bathroom and many other industries.
Characteristics of the square manhole cover are as follows:
1. Design the positioning key at the bottom of the shaft seat to prevent the vehicle from passing, suddenly brake the manhole cover turning, reduce the product wear when the manhole cover turning.
2. The inner corner of the cross section of the back of the square manhole cover is an inverted triangle, so that the force strength of the product is greater.
3. The bottom of the manhole cover seat is designed with a cement positioning groove to make the manhole cover installation more stable.
4. The bottom of the water grate cover is enhanced with arc structure to ensure greater product stress.
Nodular cast iron anti-settlement adjustable manhole cover: Nodular iron anti-settlement adjustable manhole cover by using the special structure, the manhole frame and the inspection manhole frame from the original "pier" connection to "plug-in" connection. The large border frame seat is on the asphalt road, no external hinge, through the side and above of the manhole frame.
Pintile iron settlement adjustable manhole cover by using frame special structure, the manhole frame and manhole from the original "pier" connection to "plug" connection, large frame on the asphalt pavement, no external hinge, through the manhole side and above pressure, the manhole load greatly reduced, effectively solve the road settlement and damage problem, and by using three-point spring arm lock device fixed cover, frame, to prevent the cover beating, reduce the noise. A new adjustable anti-settlement manhole cover is adopted. The new adjustable anti-settlement manhole cover includes manhole cover body and manhole cover frame, which solves the problem of easy damage, and achieves the effect of reducing noise, eliminating settlement, saving construction period, with obvious economic benefits.
The new adjustable anti-settlement manhole cover has rapid construction, reduced construction impact, strong integrity, high degree, less surface, quick and convenient construction, can open to traffic without maintenance; prevent settlement, noise, odor, prevent manhole cover beating, vibration, displacement, prevent accidental opening, prevent accidental closure and skid effect and easy to clean.