Ceramic inspection well cover and its preparing method

A technology of manhole cover and ceramics, which is applied in the field of ceramic manhole cover and its preparation, can solve problems such as fast decay of bearing capacity, influence on dredging and maintenance of pipelines, corrosion of lock cylinder, etc., achieve good fracture toughness and reduce the possibility of theft sexual effect

Inactive Publication Date: 2006-03-08
吕云南
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the problem that they exist is: (one) take the cast iron anti-theft manhole cover that locks between well cover and well ring, no matter how tight the anti-theft mechanism is, people can still steal it, and its lock cylinder can rust and cannot be opened after a long time, affecting Normal pipeline dredging and maintenance work
(2) The periphery of the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The chemical composition of ceramic manhole cover of the present invention is as table 1.

[0023] Material

category

Chemical

Element

components

wt%

Composition principles and methods

Binder

or

filler

al 2 o 3

2-100

When a certain raw material accounts for more than 35% of the components, it is called the base

materials, and the rest are called fillers (the sum of the amount of the three is greater than or equal to

65%). The base material determines the physical and mechanical properties of ceramics, and the filler can be

See Table 2, Table 3, Table 4 to improve its physical and mechanical properties.

MgO

0-95

SiO 2

0-74

increase

Tough

material

material

Grain

material

SiC

0-15

Both can complete each other

full replacement

The three types of materials can completely take each oth...

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PUM

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Abstract

This invention relates to a ceramic manhole cover made from ceramic material. The raw material to produce this ceramic and their percentages are: 2-100% Al2O3, 0-95% MgO, 0-74% SiO2, 0-15% SiC, 0-20% ZrO2, 0-15% Si3N4, 0-15% B4C, 0-15% SiO2, 0-15% B2O3, 0-15% TiO2, 0-10% Li2O, 0-2% CaO, 0-2% TiO2 and 0-6.2% ZnO. The sum amount of Al2O3, MgO and SiO2 is not less than 65%. The preparation method is as follow: first, produce preforms with the raw material; under 40-100MPa pressure, these preforms are pressure formed, surface strengthened and plasticized. Advantages: good in anti-bending strength, good fracture toughness. As the cover has no recovering value, the possibility of being stolen is reduced.

Description

technical field [0001] The invention relates to a ceramic manhole cover and a preparation method thereof. Background technique [0002] Existing manhole covers or manhole covers are generally made of cast iron. Because the materials have recycling value, they are often stolen and lost seriously. Vehicle damage and casualty accidents often occur in manhole covers that lose their manhole covers. For anti-theft people one, consider using anti-theft device on the structure of manhole cover, such as Chinese patent 93237579,95241036,96232738,99227151 or the like; But the problem that they exist is: (one) take the cast iron anti-theft manhole cover that locks between well cover and well ring, no matter how tight the anti-theft mechanism is, people can still steal it, and its lock cylinder can rust and cannot be opened after a long time, affecting Normal pipeline dredging and maintenance work. (2) The periphery of the manhole cover that adopts reinforced concrete or fiberglass mat...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/04C04B35/14C04B35/622E02D29/14
Inventor 吕云南
Owner 吕云南
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