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Castable for insulating tube bus and process for preparing inorganic insulating tube bus by using same

A technology for insulating pipes and castables is applied in the field of insulating pipe busbar castables and the technical field of preparing inorganic insulating pipe busbars. The effect of good and super corrosion resistance

Pending Publication Date: 2021-04-20
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of poor insulation and easy cracking of the bus duct, the present invention provides an insulating pipe bus castable and a process for preparing the insulating pipe bus

Method used

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  • Castable for insulating tube bus and process for preparing inorganic insulating tube bus by using same
  • Castable for insulating tube bus and process for preparing inorganic insulating tube bus by using same
  • Castable for insulating tube bus and process for preparing inorganic insulating tube bus by using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An insulating tube busbar castable, the mass fraction and specifications of its raw materials are shown in Table 2.

[0031] Table 2 Raw material mix ratio of insulating pipe busbar castable

[0032]

[0033]

[0034] The process of preparing the insulating pipe busbar using the insulating pipe busbar castable described in this embodiment, according to the ratio and specifications of the raw materials described in Table 2, the specific preparation method includes the following steps in sequence:

[0035] (1) Aggregate silicon micropowder and filler (silicon oxide and wollastonite) are placed in a drying oven to dry for subsequent use;

[0036] (2) Add the epoxy resin to the mixer, heat up to 120°C, stir evenly after it is completely melted, add the dried and cooled filler (silicon oxide and wollastonite), cool down to 85°C, and vacuum degas;

[0037] (3) Add aggregate silicon micropowder (4-6 mesh, 16-30 mesh and 40-60 mesh gradation 6:1:1), curing agent (polyeth...

Embodiment 2

[0041] The difference between Example 2 and Example 1 is that the aggregate silica powder is composed of particle sizes of 4-6 mesh, 16-30 mesh and 40-60 mesh in a gradation of 4:3:1.

[0042]Combined with the performance test results in Table 3, it shows that the insulating pipe busbar prepared by the insulating pipe busbar castable described in Example 2 has a smooth appearance without delamination, and the mechanical test results show that the flexural strength is 35MPa, and has good mechanical properties; the water absorption rate is tested 0.03%, with excellent waterproof effect; electrical performance test results show that the insulation resistance at room temperature is 13000MΩ, with excellent insulation effect; fire resistance test low voltage 760° / 3h fire prevention.

Embodiment 3

[0044] The difference between embodiment 3 and embodiment 1 is that the parts of resin system, aggregate and filler are 150 parts, 650 parts and 200 parts respectively.

[0045] Combined with the performance test results in Table 3, it is shown that the insulating pipe busbar prepared by the insulating pipe busbar castable described in Example 3 is not smooth and not delaminated. The mechanical test results show that the flexural strength is 31MPa and has excellent mechanical properties; the water absorption rate is tested 0.05%, with excellent waterproof effect; electrical performance test results show that the insulation resistance at room temperature is 10000MΩ, with excellent insulation effect; fire resistance test low voltage 750° / 3h fire prevention.

[0046] Table 3 main properties of the insulating castable of the present invention

[0047]

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Abstract

The invention discloses a castable for an insulating tube bus. The castable comprises the following raw materials in percentage by mass: 11-15% of epoxy resin, 2-5% of a curing agent, 1-3% of a toughening agent, 0.5-1% of an accelerant, 0.5-1% of a diluent, 55-65 wt.% of aggregate silica powder, 8-13% of filler alumina and 9-12 % of filler wollastonite. The castable for the insulating tube bus is high in acid resistance and alkali resistance after being cured, is hardly corroded by environmental acid and alkali, is high in compactness, is less than 0.05% in water absorption, is greater than 30MPa in breaking strength, is greater than 1T ohm in normal-temperature insulation resistance, and greatly improves the safety coefficient of an inorganic casting bus duct in use. Therefore, the insulating tube bus prepared from the castable has the characteristics of high insulativity, corrosion resistance, stable performance and the like.

Description

technical field [0001] The invention specifically relates to a pouring material for an insulating pipe busbar and a process for preparing an inorganic insulating pipe busbar. Background technique [0002] Insulated tubular busbars are widely used in various places such as shipbuilding, papermaking, power plants, substations, petrochemical, iron and steel metallurgy, machinery and electronics and large buildings due to their outstanding advantages such as high mechanical strength, large carrying capacity and good insulation performance. [0003] The busway of the metal casing cannot prevent acid rain corrosion, and the corrosive gas produced by the chemical plant, and even the corrosive liquid will splash on the electrical products. This requires the busbar to have corrosion resistance. The epoxy resin castable for pouring busway has excellent anti-corrosion performance and can effectively resist the erosion of various chemicals. [0004] The solid epoxy composite resin cas...

Claims

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Application Information

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IPC IPC(8): C04B26/14C04B14/04C04B14/06C04B14/30C04B111/92C04B111/28
Inventor 程晓敏王秀丽徐凯陈泗洪李元元南浩周锦平
Owner WUHAN UNIV OF TECH
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