RU2130511C1 - Anode grounding conductor - Google Patents

Abstract

FIELD: devices of cathode protection and electromechanical treatment of materials. SUBSTANCE: anode grounding conductor has electrodes in the form of thin-walled titanium body concentrically arranged round cable. Outer surface of the body has protrusions. Layer of active material is applied to catalytically treated surface for reduction of current density, and contact members ensuring electrical connection of the body with cable conductor may be stamped directly from titanium body in the form of lugs or cut outs or made in the form of expansion bolts or rivets. Body of grounding conductor may be made in the form of band wound on cable with connection of adjacent turns by locks and by installation of contact members. EFFECT: higher efficiency. 4 cl, 3 dwg

Description

 The invention relates to electrical engineering, in particular to devices for cathodic protection and electrochemical processing of materials.

 Known anode ground electrode containing a current lead and serially connected electrodes, each of which consists of a thin-walled titanium housing with a catalytic coating, a cable located along the axis of the device and contact elements in the form of bushings located inside the housing and cable sealing nodes crimping the housing at the ends.

 The disadvantage of this design is the high complexity of manufacturing and low reliability of electrical contact elements and cable sealing.

 To eliminate the noted drawbacks, protrusions are applied on the outer surface of the electrode housing, on the catalytically treated surface of which a layer is applied in the form of an active mass to reduce current density. In addition, the contact elements can be stamped out of the titanium case in the form of various protrusions, bends or cuts, and also made in the form of dowels or rivets that provide electrical connection of the case with a residential cable, and the case can be made of tape wound around the cable, interlocked locks.

 In FIG. 1 shows a diagram of an anode earthing switch with a contact element in the form of a sleeve; in FIG. 2 - contact elements in the form of rivets, bends and cuts; in FIG. 3 - a device with a housing made of tape.

 A cable in the form of a core 1 and insulation 2 is installed along the axis of a thin-walled titanium case 3. The internal cavity of the case is filled with insulating compound 4 (between the plug 5 and contact element 6). The latter is made in the form of a sleeve, crimped by a housing under current, which enhances electrical contact due to spot welding. On the outer surface of the housing protrusions 7 are made, the surface of which is catalytically treated.

 The thickness of this layer is 5-50 A. A layer 8 is applied along the catalytic layer - an active mass to reduce current density (magnetite as the most environmentally friendly material, manganese oxide, etc., as well as additives, for example, carbon compounds to give the layer elasticity), which are applied anodically or by plasma spraying. Polymers may be introduced into layer 8 to reduce brittleness and ensure the integrity of the layer. Outside layer 8, layer 9 is applied to extract charge carriers from the medium and reduce current density (for example, a mixture of several fractions of ground magnet, coke, etc.).

 A filter bed 10 is arranged over the layer 9 and a perforated casing pipe 11 is put on, and the ends of the ground electrode are closed by covers 12.

 Contact elements instead of the sleeve 6 can be made in the form of dowels and rivets 13, or bends or cuts 14.

 The body 3 of the ground electrode can be made in the form of a tape with a pre-treated surface and wound on a cable. The turns of the tape are interconnected by locks 15 for electrical connection and tightness (at the same time, the locks play the role of protrusions).

 When applying electric potential to the core 1, the corresponding charge acts on the medium, thanks to the contact elements 6, 13, 14 (insulation 2 cables in the places of contact removed or broken), the housing 3, the protrusions 7, layers 8 and 9. In this case, the developed surface of the protrusions 7 and layer 8 provides an extensive zone of high-quality impact on the medium, and the perforated casing 11 with sprinkling 10 - contact with the medium. The tightness and design of the ground electrode system are provided by sealant 4, plugs 5 and covers 12.

 The use of the proposed options for contact elements eliminates the time-consuming operations of stripping the cable, installing and crimping the bushings.

 The proposed anode ground electrode provides uniform high-quality contact with the medium, while possessing high manufacturability.

Claims (4)

 1. Anode earthing switch containing electrodes in the form of a thin-walled titanium housing cable concentrically positioned relative to the core with protrusions made on its outer surface on which a catalytic coating is applied, contact elements that provide electrical connection between the housing and the living cable by contact welding, a layer for removing carriers charge from the medium and casing pipes with filtering conductive filling, characterized in that the catalytic coating on the outer surface of the housing nan September conductive layer from the active mass in order to reduce the current density.  2. The earthing switch according to claim 1, characterized in that the contact elements are stamped directly from the titanium body in the form of bends or cuts.  3. The earthing switch according to claim 1, characterized in that the contact elements are made in the form of dowels or rivets with which the earthing switch housing is punctured from the outside to ensure its electrical contact with the core cable.  4. The earthing switch according to claim 1, characterized in that the thin-walled titanium body is made in the form of a tape with a catalytically machined surface wound on a cable, the turns of which are connected by locks, on which the contact elements are mounted.

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