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A composite manhole cover

A manhole cover and resin technology, which is applied in the direction of synthetic resin layered products, artificial islands, underwater structures, etc., can solve problems such as cracks and blocks, fading, and poor gloss stability of manhole covers, so as to reduce theft and material loss. durable effect

Active Publication Date: 2016-08-31
刘明昌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the manhole covers of urban pavement wells (wells with functions such as sewers, waterways, urban cable underground passages and other pipeline channels open to the ground for maintenance and sewage discharge) are divided into materials: ductile iron, cement, steel fiber, and reinforced resin. Manhole covers made of various rigid materials such as magnesite cement, RPC, etc. have strong hardness and rigidity, strong pressure resistance, but average shear resistance. Once the load exceeds its maximum load, permanent deformation or failure will occur. Cracking and crushing; manhole covers made of silica gel, ultra-high polymer materials and other tough materials have good toughness, but their rigidity is average, and can only bear a load of about 30 tons. Once overloaded, the deformation is particularly serious and the basic function of manhole covers to protect vehicle safety ;The service life of manhole covers on the market is generally 5-10 years, which cannot match the normal service life of 30 years on the road. Therefore, it often happens that the road is not damaged and the manhole cover is broken, and there are often eye circles caused by changing the manhole cover on the road , The open holes caused by the crushing of the manhole cover, the screen manhole cover formed by the hole matrix arrangement caused by the holes pressed out by the local weak link of the manhole cover, from the appearance, the manhole cover currently in service or the gloss stability is not strong and fades after being exposed to the sun Serious, either the rust cannot be corroded by strong acid and alkali, or the integrity is not good, local cracks and blocks appear, or local holes appear; no matter what the situation is, it is not an ideal manhole cover. Manhole covers with good integrity, a service life of more than 20 years, and beautiful appearance must be the best substitute for existing manhole covers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The resins used in this embodiment are all unsaturated polyester resin 191DA, all contain methyl ethyl ketone peroxide and cobalt isozincate in the unsaturated polyester resin 191DA, the content of methyl ethyl ketone peroxide is 5% of unsaturated polyester resin 191DA weight , The content of cobalt isozincate is 3% of the weight of unsaturated polyester resin 191DA.

[0027] Such as figure 1 As shown in -6, a composite manhole cover includes a manhole cover body 4 and a manhole cover base 5. The manhole cover body 4 is divided into three layers, which are an ultraviolet absorbing layer 401, a filling base layer 402 and a glass fiber layer 403 from top to bottom. An advertising layer 404 is arranged above the ultraviolet absorbing layer; an anti-drop safety net 8 is fixed on the well cover base 4; the thickness of the filling base layer 402 gradually decreases from the center to the edge.

[0028] The anti-falling safety net 8 includes a mesh circle 1 and a mesh surfac...

Embodiment 2

[0035] The difference between embodiment 2 and embodiment 1 is:

[0036]The resin used in the present embodiment is unsaturated polyester resin 191 DC, all contains methyl ethyl ketone peroxide and cobalt isozincate in the unsaturated polyester resin 191 DC, the content of methyl ethyl ketone peroxide is 191DA weight of unsaturated polyester resin 0.5%, the content of cobalt isozincate is 5% of the weight of unsaturated polyester resin 191 DC; the ultraviolet absorbing layer 401 is made by mixing the following raw materials in parts by weight and curing at normal temperature: the ultraviolet absorbing layer It is composed of the following raw materials in mass percentage: 70% quartz sand, 5% emery, 5% talcum powder, 0.5% ultraviolet absorber, and the rest is unsaturated polyester resin, which is 191DC; ultraviolet absorber is 2-(2' -Hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole; the filling base layer is made by mixing the following raw materials in parts by wei...

Embodiment 3

[0038] The difference between embodiment 3 and embodiment 1 is:

[0039] The resins used in this embodiment are all unsaturated polyester resin 191 DH, all contain methyl ethyl ketone peroxide and cobalt isozincate in the unsaturated polyester resin 191 DH, the content of methyl ethyl ketone peroxide is 191DA weight of unsaturated polyester resin 8%, and the content of cobalt isozincate is 0.5% of the weight of unsaturated polyester resin 191 DH; the ultraviolet absorbing layer 401 is made by mixing the raw materials in the following mass percentages and solidifying at normal temperature: quartz sand 30% , emery 20%, talcum powder 25%, ultraviolet absorber 5%, and the rest is unsaturated polyester resin 191 DH; ultraviolet absorber is 2-(2H-benzotriazole-2-yl)-6-(dodecyl Alkyl)-4-methylphenol; the filling base layer is made by mixing the following raw materials in parts by weight and solidifying at room temperature: 50 parts of unsaturated polyester resin 191 DH, 70 parts of q...

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Abstract

A composite well lid comprises a well lid body and a well lid base. The well lid body comprises three layers which are the ultraviolet absorption layer, the filling base layer and the glass fiber layer in sequence from top to bottom. The filling base layer comprises, by weight, 10-50 parts of resin, 30-70 parts of silica sand, 5-20 parts of carborundum, 5-25 parts of talcum powder and 5-25 parts of chopped glass fiber bundles of 3-10 cm long. An anti-dropping safety net is fixed to the well lid base. Due to the fact that the composite well lid does not contain any metal component, the probability that the composite well lid is stolen is greatly reduced; the material of the composite well lid is durable, and the aging life of the glass fiber layer of the reinforced structure and aging life the anti-dropping safety net are longer than 30 years, so that the service life of the well lid is identical with that of a road. The potential safety hazards caused when the well lid is changed frequently while the road is not damaged are reduced, and due to the annular weaving structure of the anti-dropping safety net, all the fiber reinforcements share the load, and the load is quickly and evenly dispersed and transmitted to a well seat foundation.

Description

technical field [0001] The invention belongs to the technical field of manufacture of inspection well safety protection matching parts, and in particular relates to a matching composite well cover for wells with functions such as maintenance and sewage discharge opened to the ground for pipeline passages such as sewers, upper waterways, and urban cable underground passages. Background technique [0002] At present, the manhole covers of urban pavement wells (wells with functions such as sewers, waterways, urban cable underground passages and other pipeline channels open to the ground for maintenance and sewage discharge) are divided into materials: ductile iron, cement, steel fiber, and reinforced resin. Manhole covers made of various rigid materials such as magnesite cement, RPC, etc. have strong hardness and rigidity, strong pressure resistance, but average shear resistance. Once the load exceeds its maximum load, permanent deformation or failure will occur. Cracking and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D29/14B32B17/04B32B27/20B32B27/04B32B27/06B32B33/00C08L67/06C08K13/04C08K7/14C08K3/36C08K3/34C08K5/14C08K5/098C08K13/02C08K5/3475
Inventor 刘明昌田浩然王玲王军刘珂
Owner 刘明昌