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Manhole cover and method for producing same

A technology for inspecting wells and manhole covers, which is applied in the direction of chemical instruments and methods, layered products, artificial islands, etc., can solve the problems of heavy manhole covers, affecting performance, complex manufacturing process, etc., to enhance corrosion resistance and aging resistance, Improve the bearing capacity and service life, and the effect of simple manufacturing process

Inactive Publication Date: 2009-06-03
CHANGSHA YUANPENG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cast iron manhole covers are heavy, easy to be stolen, and inconvenient to transport and open. Manhole covers are brittle, have poor impact toughness, and are easy to break and damage; ordinary FRP composite manhole covers are heavy, have low load-carrying capacity, poor fatigue resistance, and are easy to break and damage ;Rubber manhole covers are easily deformed at high temperature and are not anti-aging
Therefore, in cities, especially on urban roads, due to the defects of the manhole cover itself, which causes fracture damage, plus some man-made damage such as inadvertent construction and theft, the manhole cover is often damaged or lost, causing pedestrians to be injured and vehicles to be damaged.
[0003] For this reason, many scientific research workers have invested in the research team of checking the manhole cover. Chinese patent CN1134490A discloses a kind of glass fiber reinforced plastic manhole cover and its production method. It is easy to peel off from the FRP composite layer, which affects the strength
Chinese patent CN1292132C discloses a reinforced composite manhole cover and its preparation method. The reinforcing rib is made of ductile iron, and its cost is relatively high. Also, it is easy to peel off from the FRP composite layer under the action of external force, which affects the performance.

Method used

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  • Manhole cover and method for producing same
  • Manhole cover and method for producing same
  • Manhole cover and method for producing same

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Prepare various raw materials according to the process requirements and put them in the designated place for use. The composition of each part is as follows (percentage by weight):

[0045] Surface layer: functional resin 25%, quartz sand I 46%, corundum 10%, multicolored stone 8%, polypropylene fiber 5%, colorant 2%, anti-aging agent 2%, methyl ethyl ketone peroxide 1%, cobalt naphthenate 1%.

[0046] Reinforcing layer and outer layer: 60% functional resin, 38% glass fiber cloth, 1% methyl ethyl ketone peroxide, 1% cobalt naphthenate.

[0047] Rib: 36% functional resin, 55% glass fiber bundle, 8% carbon fiber bundle, 0.5% methyl ethyl ketone peroxide, 0.5% cobalt naphthenate.

[0048] Filler: 10% functional resin, 88% quartz sand II, 1% methyl ethyl ketone peroxide, 1% cobalt naphthenate.

[0049]The production is carried out according to the production process steps of well covers and well bases. The production cycle is controlled at 20 minutes. After the gel is so...

Embodiment 2

[0051] Prepare various raw materials according to the process requirements and put them in the designated place for use. The composition of each part is as follows (percentage by weight):

[0052] Surface layer: 30% functional resin, 36% quartz sand I, 20% corundum, 8% polypropylene fiber, 3% colorant, 1.5% anti-aging agent, 0.5% methyl ethyl ketone peroxide, 1.0% cobalt naphthenate.

[0053] Reinforcing layer and outer layer: functional resin 64%, glass fiber cloth 35%, methyl ethyl ketone peroxide 0.5%, cobalt naphthenate 0.5%.

[0054] Rib: 40% functional resin, 49% glass fiber bundle, 10% carbon fiber bundle, 0.5% methyl ethyl ketone peroxide, 0.5% cobalt naphthenate.

[0055] Filler: 20% functional resin, 35% quartz sand II, 30% waste glass fiber reinforced plastic slag, 13% river sand, 1% methyl ethyl ketone peroxide, 1% cobalt naphthenate.

[0056] The production is carried out according to the production process steps of well covers and well bases, and the production...

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Abstract

The present invention discloses a production method of manhole cover. It includes manhole cover and manhole seat. Said manhole cover and manhole seat are formed from surface layer, reinforcing layer, external surface layer and filling layer respectively, in which the filling layer is composed of reinforcing bar and filling material.

Description

technical field [0001] The invention relates to a well cover for sewage wells in construction and municipal engineering, in particular to an inspection well cover and a production method thereof. Background technique [0002] In the water supply and drainage systems, underground cable systems and underground communication cable systems of various buildings and municipal projects, for the convenience of construction and maintenance management, sewage wells, or mud retention wells, are installed at certain distances. Currently, sewage wells are used Most of the manhole covers are basically cast iron manhole covers, and a few use ordinary FRP manhole covers or rubber manhole covers. Cast iron manhole covers are heavy, easy to be stolen, and inconvenient to transport and open. Manhole covers are brittle, have poor impact toughness, and are easy to break and damage; ordinary FRP composite manhole covers are heavy, have low load-carrying capacity, poor fatigue resistance, and are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D29/14B32B37/02B32B37/15B29C70/00C04B30/02C04B16/04C04B14/06C04B18/16
CPCY02W30/91
Inventor 柳舒吕运凤吕文乾雷洪素吕运征
Owner CHANGSHA YUANPENG CHEM TECH
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