Changeable deep well anode land bed and construction method

Abstract

An exchangeable deep-well type anode earth-bed for protecting the buried metallic body, such as steel pipe or the bottom plate of storage tank features that the perforated concrete pipe is used as its protecting pipe, the small-size, light-weight and anticorrosive metallic oxide is used as its anode rod and the underground water is used as electrically conductive medium. Its construction method includes such steps as prefabricating perforated concrete pipe, drilling deep well, putting the concrete pipe in the deep well, and installing anode rod.

Description

technical field [0001] The invention relates to a replaceable deep well anode ground bed, which is especially suitable for electrochemical protection of metal objects buried in the ground or in contact with the ground, such as steel pipes and bottom plates of storage tanks. Background technique [0002] Cathodic protection is a relatively reasonable and effective anti-corrosion technology for metal structures. It uses the protected object as a cathode, and uses an external power supply to provide electrons to the protected object through the anode body to slow down or eliminate metal corrosion. As one of the main components of the cathodic protection system, the deep well anode bed plays a vital role in the effective operation of the whole system. At present, graphite anodes or high-silicon cast iron anodes are commonly used as anode materials. However, when deep wells are used as the anode bed, due to the heavy weight of the material itself, and th...

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Problems solved by technology

At present, graphite anodes or high-silicon cast iron anodes are commonly used as anode materials. However, when deep wells are used as the anode bed, due to the heavy weight of the material itself, and the high brittleness of cast iron, it is easy to break, and coke and other filling materials , it is very difficult to successfully install more than ten anodes into the anode well with a depth of tens of meters or even hundreds of meters. If you are not careful, it will cause accidents such as anode cable breakage and well collapse.

After the construction of this kind of deep well anode bed is completed, the coke filled in will fix the anode body in the deep well. also discarded

In addition, during the operation of the anode well, the deep well anode system will not work properly due to cable breakage, damage at the cable joint, uneven dissolution of the anode (end effect and neck effect) and gas blockage. , and cannot be repaired, it can only be discarded and rebuilt, resulting in a waste of resources

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