Resin based composite material manhole cover

Abstract

The invention is a kind of manhole of resin base compound materials. Most of usual manhole of cover is of cast iron, it is fragile and is not shock-resistance, and it is liable to be stolen. There also has a few glass fiber reinforced plastics manhole cover, because it has deficiency in structure, prescription and producing craft, the product is low intensity, bad rigidity and high cost. The invention adopts reasonable grid strengthened tendon structure and glass fibre resin base compound materials, and advanced RTM molding method.

Description

Technical field: [0001] The invention belongs to a manhole cover for inspecting underground facilities (such as running water, drainage, telecommunications, electric power, gas, heat, fire protection, sanitation, etc.), and relates to an inspection manhole cover of glass fiber reinforced resin-based composite material. Background technique: [0002] At present, known inspection well covers include: cast iron well covers, steel fiber reinforced cement-based composite material well covers, and a few other composite material well covers. Cast iron manhole covers are brittle, not resistant to impact, severely corroded, unsightly, have a lot of noise from vehicle pressure, are heavy, difficult to construct, and are seriously stolen. In the prior art, various anti-theft mechanisms have been added to the cast iron manhole cover. Although the problem of theft can be solved to a certain extent, it complicates processing, manufacturing and installation, and increases the cost. Manhol...

AI Technical Summary

Problems solved by technology

Cast iron manhole covers are brittle, not resistant to impact, severely corroded, unsightly, loud noise from vehicle pressure, heavy, difficult to construct, and serious theft

In the prior art, various anti-theft mechanisms are added to the cast iron manhole cover. Although the problem of theft can be solved to a certain extent, it complicates the processing, manufacturing and installation, and increases the cost.

Manhole covers made of steel fiber reinforced cement-based composite materials have low strength, are not impact-resistant, have small load capacity, are bulky and inconvenient to use

The production process of other composite manhole covers is complicated, which is not conducive to popularization

In recent years, research institutes have also developed some FRP inspection manhole covers successively, as CN1101961A discloses a kind of FRP inspection manhole cover and its production method, because it has deficiencies in aspects such as material formula, structural form, especially glass fiber laying process, etc., therefore The disadvantages of low product strength, poor rigidity, complex production process, and high cost have not been popularized and applied.

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