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Method for preparing wound heat-insulating drum

A thermal insulation tube and soft felt technology, which is applied in thermal insulation, pipeline protection, mechanical equipment, etc., can solve problems such as the difficulty of grinding and repairing the transition section of the inner and outer surfaces of the thermal insulation felt, insufficient bonding force between layers, and difficulty in releasing the stress of the thermal insulation tube. Achieve good high-temperature dimensional stability, short preparation cycle, and not easy to delaminate

Active Publication Date: 2011-12-14
XIAN CHAOMA SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of the continuous winding molding method is that it is difficult to grind and repair the transition section of the inner and outer surfaces of the insulation felt, and the appearance is not very beautiful; Difficult to release, resulting in product delamination
The problem of the layer-by-layer winding molding method is: due to the layer-by-layer winding, the bonding force between the layers is not strong enough, and it is also easy to cause product delamination during the carbonization and high-temperature treatment process
[0005] Although the manufacturing method of the thermal insulation material involved in the above-mentioned patent has good integrity and performance, the production cost is high and the production cycle is long

Method used

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  • Method for preparing wound heat-insulating drum
  • Method for preparing wound heat-insulating drum
  • Method for preparing wound heat-insulating drum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1: Use polyacrylonitrile-based carbon felt with an ash content less than 2000ppm, cut the polyacrylonitrile-based carbon felt to a width of 30 mm, place it in a dipping machine, and pre-impregnate the polyacrylonitrile-based carbon felt with an impregnating agent. The impregnating agent is the mixed glue of alcohol or acetone and phenolic resin, the mass fraction of phenolic resin in the mixed glue is 20%, wherein the phenolic resin is aminophenolic resin, boron phenolic resin, barium phenolic resin or water-soluble phenolic resin The amount of resin and impregnating agent is to submerge the soft felt, and then dry the pre-impregnated soft felt for 5 hours;

[0037] Step 2, the twill carbon of 1K is arranged in the dipping machine (wherein K refers to the number of thousands of tows), and the carbon cloth is dipped with the dipping solution, and the dipping solution is a mixture of alcohol or acetone and phenolic resin Mix the glue solution, the mass fraction of ph...

Embodiment 2

[0046] Step 1, using polyacrylonitrile graphite felt with an ash content less than 1000ppm, cutting the polyacrylonitrile graphite felt to a width of 120 mm and placing it in a dipping machine, pre-impregnating the polyacrylonitrile graphite felt with an impregnating agent, the impregnating agent It is a mixed glue of alcohol or acetone and phenolic resin, the mass fraction of phenolic resin in the mixed glue is 50%, wherein the phenolic resin is aminophenolic resin, boron phenolic resin, barium phenolic resin or water-soluble phenolic resin, impregnated The amount of agent used is to submerge the soft felt, and then dry the pre-impregnated soft felt for 60 hours;

[0047] Step 2, arrange the plain carbon of 1K in the dipping machine (wherein K refers to the number of thousands of tows), and dip the carbon cloth with the dipping solution, which is a mixture of alcohol or acetone and phenolic resin Mix glue solution, the mass fraction of phenolic resin in the dipping solution i...

Embodiment 3

[0056] Step 1, using viscose-based graphite felt with an ash content less than 1000ppm, cutting the viscose-based graphite felt to a width of 110 mm and placing it in a dipping machine, pre-impregnating the viscose-based graphite felt with an impregnating agent, the impregnating agent It is a mixed glue solution of alcohol or acetone and furfurone resin, the mass fraction of furfurone resin in the mixed glue solution is 80%, the amount of impregnating agent is enough to submerge the soft felt, and then dry the pre-impregnated soft felt for 32 hours;

[0057] Step 2, arrange the plain carbon of 12K in the dipping machine (wherein K refers to the number of thousands of tows), and dip the carbon cloth with the dipping solution, which is a mixture of alcohol or acetone and phenolic resin Mix the glue solution, the mass fraction of phenolic resin in the dipping solution is 80%, wherein the phenolic resin is aminophenolic resin, boron phenolic resin, barium phenolic resin or water-so...

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Abstract

The invention relates to a method for preparing a wound heat-insulating drum. The method comprises the following steps of: 1, cutting a soft felt, pre-dipping and performing air drying; 2, gumming carbon cloth; 3, brushing an adhesive on the soft felt and the carbon cloth; 4, winding; 5, curing; 6, repairing an end face; 7, sealing holes of a coating; 8, performing carbonization treatment; and 9,performing high-temperature treatment and cooling along with a furnace to obtain the wound heat-insulating drum. The method has the advantages of simple process and batch production; and the preparedwound heat-insulating drum has the advantages of difficult layering, good mechanical property, superior high-temperature dimensional stability, low thermal conductivity and low ash content. The method reduces the replacement frequency of the heat-insulating drum and has great significance in prolonging the service life of the heat-insulating drum in high-temperature furnace equipment.

Description

technical field [0001] The invention belongs to the technical field of thermal field material accessories for high-temperature furnaces, and in particular relates to a preparation method of a winding insulation cylinder. Background technique [0002] As one of the commonly used equipment in the fields of powder metallurgy, new materials, new energy, and national defense industry, high-temperature furnaces are widely used. Thermal field materials for high-temperature furnaces have dual functions of function and structure. As consumable parts, the annual consumption is huge. In recent years, due to the progress in the preparation technology of carbon / carbon composite materials and their excellent mechanical properties, thermal insulation properties, corrosion resistance, and air erosion resistance, the thermal field materials for high-temperature furnaces have gradually shifted from graphite materials to carbon / carbon composite materials. [0003] At present, the winding and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L59/02D06B3/10
Inventor 邵海成肖志超彭志刚苏君明侯卫权白建雄赵俊
Owner XIAN CHAOMA SCI TECH
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