Filling type nodular cast iron well lid provided with structure technological ribs

Abstract

The invention relates to a filling type nodular cast iron well lid provided with structure technological ribs. The filling type nodular cast iron well lid comprises a well base and a well lid body, the well lid body is placed on a well lid locating table of the well base and comprises a well lid main plate, strengthening ribs are arranged on the front face of the well lid main plate, the structuretechnological ribs are arranged on the back face of the well lid main plate and are of flat structures, and the setting quantity of the structure technological ribs is adjusted according to the bearing stage requirement of the well lid; the setting positions of the structure technological ribs are adjusted according to the bearing stage requirement of the well lid; and the two ends of the structure technological ribs are provided with structure technological rib chamfers, the problems of the too high structure technological ribs or the improper positions of the structure technological ribs are avoided, and consequently intervene generated during assembly of the well lid body and the well base is avoided.

Description

technical field [0001] The invention relates to a nodular cast iron manhole cover, in particular to a filling type nodular cast iron manhole cover provided with structural process ribs. Background technique [0002] Filled ductile iron manhole cover is a high-strength composite manhole cover made of filling concrete or other materials such as cobblestones and road bricks in the ductile iron manhole cover. Such as Figure 9 As shown, the main body of the filled ductile iron manhole cover is composed of two parts, the manhole cover and the well seat. In use, the filled well cover sits on the seating platform in the well base to form a complete product. [0003] Compared with composite material manhole covers that use resin or concrete as the matrix and bury steel bars and other fillers inside, the filled nodular cast iron manhole cover has advantages in bearing strength, structural stability, aging resistance, fire resistance, and recyclability. Outstanding advantages. Comp...

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Problems solved by technology

[0013] In order to overcome the thermal joints formed at the connection between the ribs and the main board of the manhole cover in the prior art, as well as the resulting casting defects such as shrinkage cavities and porosity, and the shrinkage on the back of the main board of the manhole cover, solve the problems caused by the increase in the height of the ribs and the overall thickening of the manhole cover. Due to the problems of material increase, weight increase, cost increase and labor intensity increase, a filled ductile iron manhole cover with structural process ribs is proposed

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