封闭后井盖面与支座面之间答应高差为±1mm。 After the manhole cover is closed, the height difference between the manhole cover surface and the bearing surface is ± 1mm.
Check that the manhole cover must not have obvious residual deformation, cracking, damage, breakage under normal use, and should have the following functions:
To prevent the manhole cover from accidentally detaching from the support, the method of determining the depth of the manhole cover with the equipment or anti-theft lock can be adopted;
Prevent vehicle tires from slipping on the surface of the manhole cover, and ensure that the anti-slip pattern will not wear during the normal use period of the manhole cover;
Anti-theft, anti-theft lock or hinge can be used;
Avoid bumping noise between the manhole cover and the support;
Avoid premature damage to the surrounding pavement structure due to inspection of the manhole cover itself.
The manhole cover should satisfy one person to open and close with a simple tool.
Long service life without any cracks after hundreds of fatigue impact tests
No sharp noise and rebound when rolling low-noise cars
Third, tough and strong, resistant to acid and alkali corrosion, no rust, anti-aging
4. Innovation and environmental protection new materials supplemented by innovation skills, non-toxic and harmless, green
V. Unpredictable changes and strong planability, personalized planning according to user needs
Six, good sealing can be sealed, effectively avoiding the leakage of harmful gases and dirt in the septic tank
7. Do not lose the value of non-recycling and reuse, and thoroughly solve the municipal dysentery that is easy to lose and theft of cast iron manhole covers.
Eight, the load can be high, high strength, high precision, strong resistance, not easy to break, and beyond the bearing capacity of nodular cast iron manhole cover
Nine, good safety and resistance, compression resistance, bending resistance, deformation resistance, the reinforcing steel skeleton will not be smashed to ensure safe use
X. Good art decoration effect and rich color, can be classified and colored according to needs, plan the shape drawings according to user needs, and integrate art into the product