Hybrid material manhole cover and manufacturing method thereof

Abstract

The invention discloses a hybrid material manhole cover and a manufacturing method thereof, particularly a sealing element of an inlet and an outlet which lead to various underground facilities, wherein the manhole cover and a support are formed in such ways of covering a filling frame by adopting hybrid materials, vibrating by adopting a vibration die machine, solidifying, molding and demolding;the hybrid materials are prepared by mixing and stirring modified unsaturated resin, chopped or super-chopped fiber, quartz sand, gravel, solidifying agent and filling agent mainly; and the frame is formed by combining mesh grids which are formed by the lamination of at least one layer of flat steel, thread steel, steel wire mesh and glass fiber mesh. The method comprises the following steps of: making the manhole cover, the support frame and the hybrid materials; putting the frame into the vibration die machine and covering and filling by using the hybrid materials; and vibrating and moldingby the die machine, and demolding after natural solidifying or roasted solidifying. The invention accords with a general standard on the embedded depth so as to be exchanged with a cast iron manhole cover, and has higher bearing capacity, simple process device, no pollution and heating, environment protection and energy saving.

Description

technical field [0001] The invention relates to a closure leading to the entrances and exits of various underground facilities, in particular to a cover plate, a water grate and a manufacturing method thereof for covering inspection wellheads of various underground pipelines. Background technique [0002] Today's underground pipeline manhole covers for municipal facilities and roads have always been made of traditional cast iron, which has inherent defects such as rust, corrosion resistance, fragility, and bulkiness. Because of its recycling value, it is stolen repeatedly and becomes a city trap, which brings great harm to public safety and people's lives and property. In order to eliminate hidden dangers in the city, various anti-theft manhole covers have emerged as the times require, but most non-metal manhole covers cannot replace cast iron manhole covers because their thickness does not meet the general standards; in addition, various non-metal manhole covers that have d...

AI Technical Summary

Problems solved by technology

The above data reflect that the bearing capacity of inspection manhole covers is generally low

The reason is mainly due to the congenital defects of its organic filler formula, the interface strength between the organic filler and the inorganic metal skeleton is weak, it is easy to peel off when it is under pressure, and the load is greatly reduced to cause damage; and the skeleton structure design is not perfect. Science, making the skeleton easy to disintegrate after the filling is broken

Moreover, at present, many organic fillers need to be heated and pressurized during the curing molding process, which consumes a lot of energy, requires a lot of equipment, occupies a large area, is expensive and complicated, and has low production efficiency and high production costs.

FRP series products such as glass fiber reinforced plastic composite inspection manhole cover and resin composite material manhole cover with high bearing capacity are difficult to be widely used and promoted due to their high cost.

Images