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A kind of solder and its igniter for exothermic welding of grounding body in grounding system

A technology of grounding system and grounding body, which is applied in the direction of aluminothermic welding equipment, welding/cutting medium/material, welding medium, etc., and can solve problems such as poor welding performance and impurities in welded joints

Inactive Publication Date: 2011-12-07
HEILONGJIANG PATENT TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problem that the existing exothermic welding hot-melt flux contains impurities in the welding joint, which leads to poor welding performance, and provides a solder and its lead for exothermic welding of the grounding body in the grounding system. fuel

Method used

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Examples

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Effect test

specific Embodiment approach 1

[0010] Specific embodiment one: A kind of solder used for exothermic welding of grounding bodies in the grounding system in this embodiment consists of 40-50 parts of copper oxide powder, 30-50 parts of copper powder, 10-15 parts Industrial pure aluminum powder, 1-2 parts of zinc powder, 1-4 parts of zirconium powder, 1-2 parts of ferrosilicon powder with a silicon mass percentage of 0.15%-0.35%, 4-5 parts of fluorspar powder, 1-2 parts of marble powder, 0.1-0.5 parts of lanthanum-cerium alloy powder.

[0011] In this embodiment, the particle size of the powder is adopted so that copper oxide powder and industrial pure aluminum powder undergo the thermite reaction. Since aluminum and copper oxide have a thermite reaction, the reaction speed is fast, the heat release is large, and explosion is easy to occur, which threatens the personal safety of welding operators. Therefore, a certain amount of copper is added to control the reaction process, which is equivalent to cooling; A...

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment differs from Embodiment 1 in that: the particle size of the copper oxide powder (CuO) is 60 mesh to 270 mesh; the mass percentage of copper oxide in the copper oxide powder has a purity of ≥99%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: This embodiment differs from Embodiment 1 in that: the particle size of the copper oxide powder (CuO) is 200 mesh; the mass percentage of copper oxide in the copper oxide powder has a purity of 99.5%. Others are the same as in the first embodiment.

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Abstract

The invention discloses a solder for exothermic welding of a grounding body in a grounding system and an ignition agent of the solder, relates to the solder for the exothermic welding and the ignition agent of the solder and solves the technical problem of poor welding performance caused by impurities contained in a welding joint which is obtained by the conventional exothermic welding hot-melting soldering agent. The solder for the exothermic welding of the grounding body in the grounding system consists of copper oxide powder, copper powder, industrial pure aluminum powder, zinc powder, zirconium powder, silicon iron powder, fluorite powder, marble powder and lanthanum cerium alloy powder. The ignition agent of the solder for the exothermic welding of the grounding body in the groundingsystem consists of magnesium powder, the copper oxide powder, the industrial pure aluminum powder, potassium permanganate powder and red phosphorus powder. When the solder and the ignition agent are used, the mass ratio of the solder for the exothermic welding of the grounding body in the grounding system to the ignition agent is (78-82):1. All elements in the solder and rare-earth elements can purify the welding joint. The invention is applicable to welding of copper, copper alloy, steel, galvanized steel, copper-clad steel, stainless steel and high-resistance heating source materials.

Description

technical field [0001] The present invention relates to solder for exothermic welding and its igniter. Background technique [0002] With the development of the power system, the requirements for grounding devices in the power system are becoming more and more stringent. A long-term, reliable and safe grounding system is the fundamental guarantee and important measure to maintain the stable operation of the power system and ensure the safety of operating personnel and electrical equipment. The weak current system puts forward the requirements of low resistivity and high corrosion resistance for the grounding device. Grounding devices often fail due to corrosion of welded joints, and reliable quality connection joints are a strong guarantee for the long-term safe operation of the grounding system. At present, copper alloys are usually used to improve the conductivity of the grounding system. For electrical connection, especially the electrical connection method of outdoor s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/36B23K23/00
Inventor 李卓然王征征刘羽吴广东
Owner HEILONGJIANG PATENT TECH DEV
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