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Glass-fiber reinforced thermo-setting resin inspection manhole cover

A glass fiber and thermosetting technology, which is applied in the field of glass fiber reinforced thermosetting resin inspection manhole covers, can solve the problems of poor bonding between the surface and the resin, large differences in thermal expansion coefficient, rust on the surface of steel bars, etc. Excellent fatigue performance and extended service life

Inactive Publication Date: 2007-03-28
BAITE GLASS FIBER REINFORCED PLASTICS QINGDAO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of bearing capacity, it is obviously improved, but because the materials of steel bars and composite materials are quite different, the difference in thermal expansion coefficient is large, and the surface of steel bars is often rusted, which leads to poor bonding of the surface with resin and reduces the service life.

Method used

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  • Glass-fiber reinforced thermo-setting resin inspection manhole cover

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The technical scheme of the glass fiber reinforced thermosetting resin inspection manhole cover of the invention is realized in the following way: SMC sheet molding compound and resin concrete are made by molding, and the molding process flow chart is shown in Figure 1.

[0018] Before the molding process, the SMC sheet molding compound should be trimmed. SMC sheet molding compound has a great influence on the molding process and product quality, so you should first understand the quality of SMC sheet molding compound, such as resin paste formula, glass fiber content, unit weight, film peelability, quality uniformity, etc. , and clipping. When cutting, the shape and size of SMC sheet molding compound cutting should be determined according to the structure of the manhole cover and the feeding position. First, make a model, and then cut the material according to the model. In order to prevent contamination from external impurities, the upper and lower films of the SMC sh...

Embodiment 2

[0022] The preparation process of resin concrete is shown in Figure 2. The ingredients and parts by weight of resin concrete are: 100 parts of unsaturated polyester resin, 2 parts of initiator, 0.1-2 parts of accelerator, 0.3 parts of durafiber, 100 parts of quartz powder, 215 parts of fine sand, and 255 parts of coarse sand . Wherein the initiator is a methyl ethyl ketone peroxide solution; the accelerator is a styrene solution containing 6% cobalt naphthoate; the length of the durafiber is 19mm, and it should be surface treated before use: the durafiber is loosened and coupled in silane After soaking in the agent solution KH-560, take it out and dry it before use; the quartz powder is 100-200 mesh, the diameter of fine sand is 0.15-1.2mm, and the diameter of coarse sand is 1.2-5.0mm.

[0023] Others are the same as embodiment 1.

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Abstract

The invention relates to a manhole cover. It improves the bearing ability and useful life of normal glass steel manhole over. It adopts SMC flake plastic and resin concrete molding through die stamping to extremely improve the bearing ability and useful life, and lower manufacturing cost.

Description

technical field [0001] The invention relates to an inspection well cover used in urban construction and municipal engineering, in particular to a glass fiber reinforced thermosetting resin inspection well cover. Background technique [0002] The materials used for inspection manhole covers were mostly reinforced concrete at first, but due to their high brittleness, easy aging, and easy breakage, they were gradually replaced by cast iron and ductile iron. Now cast iron (including ductile iron) manhole covers account for more than 90%, especially compared with cast iron, nodular cast iron manhole covers are used more and more because of their brittleness, easy rust and improved load capacity. big. Due to the recycling value of cast iron manhole covers, they are often the target of criminals, and accidents of car crashes and deaths due to theft of manhole covers occur from time to time. In order to solve the problems of manhole cover theft and various nuisances, two methods a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/14C04B26/18C04B14/42C04B14/06C04B24/04B28B3/00
Inventor 晏石林田红见
Owner BAITE GLASS FIBER REINFORCED PLASTICS QINGDAO
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