Impressed current cathodic protection device for container and pipeline inner wall

Abstract

The invention discloses an impressed current cathodic protection device for inner walls of a container and a pipeline. The device comprises a permanent seat, a fastening device, an auxiliary anode and an insulating jacket, wherein the insulating jacket and the auxiliary anode form an integral body through sheathing; a center hole is formed in the permanent seat, in central alignment with holes in the walls of the container and the pipeline and fixedly connected with the outer walls of the container and the pipeline in a welding manner; a centre hole is formed on the fastening device which is inserted into the center hole of the permanent seat and is hermetically and fixedly connected with the permanent seat; the upper part of the insulating jacket is inserted into the center hole of the fastening device and is hermetically and fixedly connected with the fastening device; a lead cable of the auxiliary anode passes through the center hole of the fastening device and is electrically connected with an external cable. By arranging the fastening device which is connected with and used for fixing the anode and adopting circular truncated cone threaded connection and trapezoid Telfon material to seal, the device can bear relatively high pressures and can be used for applying impressed current cathodic protection on the inner walls of the pressure container and the pipeline required by a safe pressure range.

Description

technical field [0001] The invention relates to a cathodic protection device, in particular to an externally applied current cathodic protection device for the inner wall of a container and a pipeline. Background technique [0002] When designing impressed current cathodic protection for the inner wall of steel containers and pipelines, it is necessary to open holes in the tank body, and extend the auxiliary anode into the electrolyte solution inside the container and pipeline. , The cable forms an electrical circuit, and forms a cathodic protection for the inner wall of the container and the pipeline. In China, the current domestic cathodic protection for the external current applied to the inner wall generally places the auxiliary anode in the electrolyte solution inside the container, which requires very high insulation requirements for the joint between the cable and the auxiliary anode, and is prone to short circuit due to poor insulation treatment. At the same time, t...

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Problems solved by technology

However, domestic current cathodic protection for the external current on the inner wall generally places the auxiliary anode in the electrolyte solution inside the container, which requires very high insulation requirements for the joint between the cable and the auxiliary anode, and is prone to short circuit due to poor insulation treatment

At the same time, the insulation sheath on the outside of the cable is also prone to aging problems if it is soaked in the solution for a long time

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