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A high-temperature-resistant and anti-corrosion electric heating belt coating and its coating method

An electric heating band and high-temperature-resistant technology, which is applied in the direction of anti-corrosion coatings, fire-proof coatings, coatings, etc., can solve problems such as poor electrical insulation, loss of insulation ability, environmental debris pollution, etc., to avoid insulation aging and deterioration, and avoid coating Layer peeling, the effect of improving heat resistance and aging resistance

Active Publication Date: 2020-10-09
山西臣功新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the use of electric heating belts, accidents caused by high temperature and fire are the biggest safety hazards. The reasons include the following aspects: due to excessive use time, environmental debris pollution, high temperature for a long time, or exposure to moisture and corrosion , the insulation is aging and deteriorated and loses its insulation capacity, causing a short circuit to catch fire; or the electric heating belt is exposed outdoors, and due to overvoltage such as lightning strikes, the insulation of the electric heating belt may be broken down to form an instantaneous short circuit; Current but stronger heating effect than short circuit current, causing fire or even explosion etc.
In order to prevent the heating cable from being oxidized and burned at high temperature, a layer of glue is generally applied to the end of the existing heating belt, but there are the following disadvantages: it cannot be sprayed, only brushed; the bonding force is not good at high temperature; heat conduction at high temperature Poor performance; poor electrical insulation; high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for coating a high-temperature-resistant and anti-corrosion electric heating belt coating, comprising the following steps:

[0022] Step 1. Weigh the silicone resin, add 2.0 times its weight of inorganic filler to the silicone resin, stir to obtain a mixture, then add a nano-modifier whose weight is 2.5% of the total weight of the mixture, and add 3 times the weight of the mixture weight of deionized water, stirred evenly, ball milled, filtered, and dried to obtain a powder, the powder was placed in a reaction kettle, and ethanol, glycerin and surfactant were added, and the reaction kettle was heated to 85°C under 1.3 atmospheric pressure , after reacting for 4 hours, stop heating, take out the material after standing for 2.5 hours, wash with deionized water, and dry to obtain a modified inorganic filler for subsequent use; the inorganic filler is composed of magnesium oxide, zinc oxide and aluminum oxide, magnesium oxide, The weight ratio of zinc oxide and alu...

Embodiment 2

[0026] A method for coating a high-temperature-resistant and anti-corrosion electric heating belt coating, comprising the following steps:

[0027] Step 1. Weigh the silicone resin, add 1.7 times its weight of inorganic filler to the silicone resin, stir to obtain a mixture, then add a nano-modifier whose weight is 1% of the total weight of the mixture, and add 2.0 times the weight of the mixture weight of deionized water, stirred evenly, ball milled, filtered, and dried to obtain a powder, the powder was placed in a reaction kettle, and ethanol, glycerin and surfactant were added, and the reaction kettle was heated to 75°C under 1.5 atmospheric pressure , after reacting for 4.5 hours, stop heating, take out the material after standing for 2 hours, wash with deionized water, and dry to obtain a modified inorganic filler for subsequent use; the inorganic filler is composed of magnesium oxide, zinc oxide and aluminum oxide, magnesium oxide, The weight ratio of zinc oxide and alu...

Embodiment 3

[0031] A method for coating a high-temperature-resistant and anti-corrosion electric heating belt coating, comprising the following steps:

[0032]Step 1. Weigh the silicone resin, add 1.5 times its weight of inorganic filler to the silicone resin, stir to obtain a mixture, then add a nano-modifier whose weight is 3% of the total weight of the mixture, and add 1.5 times the weight of the mixture weight of deionized water, stirred evenly, ball milled, filtered, and dried to obtain a powder, the powder was placed in a reaction kettle, and ethanol, glycerol and surfactant were added, and the reaction kettle was heated to 70°C under 1.2 atmospheric pressure , after reacting for 5 hours, stop heating, take out the material after standing for 3 hours, wash with deionized water, and dry to obtain a modified inorganic filler for subsequent use; the inorganic filler is composed of magnesium oxide, zinc oxide and aluminum oxide, magnesium oxide, oxide The weight ratio of zinc and alumin...

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Abstract

The invention discloses a high temperature-resistant anticorrosion ribbon heater coating and a coating method thereof. The coating comprises, by weight, 100 to 135 parts of glue, 25 to 27 parts of modified phenolic resin, 35 to 38 parts of sodium silicate, 20 to 35 parts of a modified inorganic filler, 5 to 10 parts of nano-silicon carbide, 5 to 10 parts of nano-boron nitride and 10-15 parts of silicon dioxide. The coating method of the ribbon heater coating comprises putting the coating into a spray gun pot, carrying out repeated spray-coating on a ribbon heater to obtain multiple coating layers, and curing the coating layers at 200 DEG C for 24-48h. The coating method utilizes a spray gun-based coating method. Compared with the existing artificial brush coating method, the method improves coating uniformity. The coating has a good bonding force at a high temperature, does not fall off, has good electrical insulation properties at a high temperature, prevents breakdown under 1000V in 1h, has good thermal conductivity and a thermal conductivity rate of 20 w / m.k and realizes a low cost.

Description

technical field [0001] The invention relates to the technical field of electric heating belts, in particular to a high-temperature-resistant and anti-corrosion electric heating belt coating and a coating method thereof. Background technique [0002] Electric heating belt is a heating element of self-limiting temperature heating belt. It is a core belt made of semiconductor PTC material with a positive temperature coefficient that is evenly extruded between two parallel metal busbars. It can be widely used in storage and transportation of oil, Insulation, heat tracing, heating, etc. of pipe tanks, pumps, valves, instruments, tanks, houses, geothermal heat, etc. for water, gas and other media. [0003] Electric heating belts are generally divided into parallel type and series type according to the structure, and self-limiting type and constant power type according to the calorific value. The wire core of the self-limiting electric heating belt is a very complex high molecular...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/08C09D7/62C09D7/61
CPCC08K3/34C08K9/04C08K9/08C08K13/06C08K2003/222C08K2003/2227C08K2003/2296C08K2003/382C08K2201/014C09D1/00C09D5/08C09D5/18C09D7/61C09D7/62C09D7/65
Inventor 孙俊彪林云汉刘爱杰
Owner 山西臣功新能源科技有限公司
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