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Electric heating tube manufacturing process

A manufacturing process and technology of electric heating tube, applied in the direction of heating element shape and other directions, can solve the problems of low pressure resistance, short life, small application range, etc., and achieve the effect of high pressure resistance, long service life and not easy to damage

Inactive Publication Date: 2016-01-13
TANGZHOU QIANGMING ELECTROTHERMAL APPLIANCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current withstand voltage standard of electric heating tubes is that under the condition of 1500V / mit, there is no breakdown, and the maximum does not exceed 2000V. Existing products all adopt this standard, which has low withstand voltage, small application range, and relatively short life.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0017] The manufacturing process of the electric heating tube:

[0018] (1) To remove impurities and oil stains from seamless steel pipes, dry them at a temperature of 60° to 80° to remove moisture and a small amount of oil stains, wrap them with cloth and sandpaper, and place them in the pipe to remove impurities;

[0019] (2) Make the heating wire spiral;

[0020] (3) Measure the resistance of the heating wire;

[0021] (4) Rivet the conductive rod on the heating wire;

[0022] (5) Insert the heating wire into the seamless steel pipe and fill it with G3 high temperature magnesium oxide aluminum powder;

[0023] (6) Perform high-voltage detection under the condition of 3000-3500V / mit;

[0024] (7) Shrinkage treatment, shrinking the diameter of the seamless steel pipe from 14mm to 12mm;

[0025] (8) Measure the resistance of the heating wire again to meet the requirements;

[0026] (9) The high voltage test is carried out for the second time, and the condition is not lowe...

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Abstract

The invention discloses an electric heating tube manufacturing process, which relates to the technical field of electric heating tube manufacturing. The process comprises steps: decontamination and impurity removal are carried out; an electric heating wire is manufactured; resistance of the electric heating wire is measured; a conductive rod is riveted on the electric heating wire; the electric heating wire penetrates through a seamless steel tube, and filling of G3 high-temperature magnesium aluminum oxide powder is carried out; in a condition of 3000 to 3500V / mit, high voltage detection is carried out; tube narrowing is carried out, and the diameter of the seamless steel tube is narrowed to 12mm from 14mm; the resistance of the electric heating wire is measured again, and requirements are reached; second-time high voltage test is carried out in a condition no lower than 2800V / mit; drying and annealing are carried out; and test is carried out according to drawing requirements, and after qualification, a tube sealing nozzle is sealed with silicone oil. The electric heating tube manufactured by the above process has the advantages of high voltage resistance, long service life and hard damage.

Description

technical field [0001] The invention relates to the technical field of electric heating, in particular to the technical field of manufacturing electric heating tubes. Background technique [0002] The current withstand voltage standard of electric heating tubes is that under the condition of 1500V / mit, there is no breakdown, and the maximum does not exceed 2000V. Existing products all adopt this standard, which has low withstand voltage, small application range, and relatively short life. . Contents of the invention [0003] The purpose of the present invention is to provide a processing technology of an electric heating tube with high withstand voltage and long service life. [0004] The specific process steps are: [0005] (1) Remove impurities and oil from seamless steel pipes; [0006] (2) Make the heating wire spiral; [0007] (3) Measure the resistance of the heating wire; [0008] (4) Rivet the conductive rod on the heating wire; [0009] (5) Insert the heatin...

Claims

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Application Information

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IPC IPC(8): H05B3/44H05B3/52
Inventor 杨书春
Owner TANGZHOU QIANGMING ELECTROTHERMAL APPLIANCE CO LTD
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