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A method for installing and connecting magnesium anode rods for water storage water heaters

A connection method and technology of magnesium anode, applied in the field of material processing, can solve the problems of low bonding strength between the iron core and the anode rod, prone to crevice corrosion, cumbersome assembly procedures, etc., to reduce interface resistance, avoid crevice corrosion, and improve welding quality effect

Inactive Publication Date: 2017-08-25
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at disadvantages such as cumbersome assembly procedures, low bonding strength between the iron core and the anode rod, prone to crevice corrosion, and high interfacial resistance caused by human factors in the existing magnesium alloy sacrificial anode assembly process, and develops a magnesium alloy sacrificial anode rod The process route of friction welding with iron core dissimilar metals, the main process is shown in figure 1

Method used

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  • A method for installing and connecting magnesium anode rods for water storage water heaters

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Experimental program
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Effect test

Embodiment 1

[0023] Fasten the iron core 1 on the rotating shaft 3, turn the front end of the iron core 1 into a cone shape, the cone angle is 0.5π, and the iron core about 5mm; at the same time, fix the magnesium anode rod 2 in the fixture 4 with a circular groove; open the valve of the protective gas guide pipe 5 to make the SF 6 +CO 2 The mixed gas covered the surface of the magnesium anode rod 2, where SF 6 :CO 2 =1:100 (volume ratio), the flow rate is about 0.01L / min, continuous air supply; the motor is turned on to drive the rotating shaft 3 to rotate at a high speed, the speed of the iron core 1 is kept at about 2400r / min, and the iron core 1 is on the rotating shaft 3 Driven by it, it moves vertically downward at a speed of about 2mm / s until the iron core 1 is implanted into the rod about 25mm; after the magnesium liquid on the magnesium anode rod 2 is solidified and cooled, take the welded magnesium anode rod 2 out to be assembled. The service life of sacrificial anode rods c...

Embodiment 2

[0025] Fasten the iron core 1 on the rotating shaft 3, and the front end of the iron core 1 is tapered, the cone angle is 0.5π, the iron core is about 8mm; at the same time, fix the magnesium anode rod 2 in the fixture 4 with a circular groove; open the valve of the protective gas guide pipe 5 to make the SF 6 +CO 2 The mixed gas covered the surface of the magnesium anode rod 2, where SF 6 :CO 2 =1:100 (volume ratio), the flow rate is about 0.008L / min, continuous air supply; the motor is turned on to drive the rotating shaft 3 to rotate at a high speed, the speed of the iron core 1 is kept at about 2800r / min, and the iron core 1 is on the rotating shaft 3 Driven by it, it moves vertically downward at a speed of about 5mm / s, until the iron core 1 is implanted into the rod about 25mm; after the magnesium liquid on the magnesium anode rod 2 is solidified and cooled, take the welded magnesium anode rod 2 out to be assembled. Compared with the traditional adhesive connection m...

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Abstract

The invention relates to a method for installing and connecting a magnesium anode rod used in a water storage type water heater. The iron core is first fastened on the rotating shaft by means of friction welding, and the front end of the iron core is tapered; at the same time, the magnesium anode rod is fixed on the In the fixture with a circular groove; open the valve of the protective gas guide pipe so that the mixed gas of SF6+CO2 covers the surface of the magnesium anode rod; turn on the motor to drive the rotating shaft to rotate at a high speed, and at the same time the iron core is driven by the rotating shaft , rotate at high speed and move vertically downward until the iron core is implanted into the rod; after the magnesium liquid on the magnesium anode rod solidifies and cools down, remove the welded anode rod and wait for assembly. The invention can realize the seamless welding of the iron core and the magnesium rod, not only can improve the connection strength between the iron core and the magnesium rod, reduce the interface resistance to the greatest extent, but also has no gap, and avoids the bonding between the iron core and the magnesium rod Crevice corrosion caused by the gap caused by the time.

Description

technical field [0001] The invention relates to a method for installing and connecting a magnesium anode rod used in a water storage type water heater, in particular to a method for installing and connecting a magnesium alloy anode rod used as a sacrificial anode in a water storage type water heater and an iron core, and belongs to the field of material processing Processing method of medium magnesium anode rod. Background technique [0002] The inner tank of water storage water heaters (including electric water heaters) not only requires heat preservation and pressure resistance, but also must have corrosion resistance and good sealing performance. If the water heater is used for a long time, if no anti-corrosion protection is added, the inner tank will be corroded and perforated, resulting in water leakage, greatly reducing the safety factor of the water heater, and the water heater will be scrapped accordingly. [0003] Cathodic protection is to connect a metal with a ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F13/02
Inventor 邹宏辉马志新卢晓军温军国
Owner GRIMAT ENG INST CO LTD
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