SU20181A1 - The way to control the effects of stray currents, as well as chemical and electrochemical processes on underground electrical cables - Google Patents

Description

  .

current, hard tire H and insulating gasket V (Fig. 2). At the cable connection points, bell-shaped caps M are installed (Fig. 4) into which air can be forced through pipes G and 5, the pressure of which prevents water from penetrating uninsulated parts abel. FIG. 3 shows a cable well with this cap. The connection of the ends of the control wires is carried out with the help of clamps N on the mufgs (installed in caps at the joints. From the same clamps wires k to the control point can be removed.

The cable can be placed in several zholobah. For example, in FIG. 6 and 7 two zholob 3 and 4 are shown in which / the cable 11 is located, which is filled in exactly the same way as the space between the zholoba 7, bitumen. Insulating paper 15 is also laid in the inner chute, and there are also control wires 13, 14, which can also be placed between the two chutes, in addition to the wires D shown in FIGS. 1 and 2. The boxes and the chutes are connected with overlays of such they are the same shape as the ones themselves, and the seams between them are filled with bitumen (Figs. B and 7), so that moisture can get to the cable only through a thick layer of bitumen.

Tire tires 3 and 4 may be formed by their curved edges. So that there are no closed circuits for Foucault currents, the chute is provided with an internal and isolation pad 29 (Fig. 8), or the sap itself is made of an insulating material (Fig. 9).

The subject of the patent.

1. The way to control the effects of stray currents, as well as chemical and electrical processes on the underground. electric cables, placed and gestured with bitumen and covered in it, Cocoa chute Find, in your

a queue in a box filled with insulating material, characterized in that, in order to verify the condition of the cable and establish the onset of corrosion, over the insulating layer covering the cable (for example, winding covering the lead sheath), one or more wires are laid along the cable, He strengthened them with a thin layer of non-insulating material, and wrapped them around with insulating material again.

2. The modification of the method specified in paragraph 1, characterized in that, in addition to the wires imposed on the wires specified in paragraph 1, one or two additional control wires, parallel to the cable and bitumen poured together with the cable, are laid in the cable's chute.

3. In the method described in clauses 1 and 2 for cable laying, several concentric rigid cans nested into each other to eliminate the contact between which cans are laid insulating rigid gaskets, and the resulting empty space is filled with an insulating mass hpH than additional control wires are laid between the first and second hard zholob. .

4. Acceptance of the method described in paragraphs 1 and 3, characterized in that, in order to eliminate the Foucault currents in the hard cholok, the tires of these cholobas do not form with a chute in cross section of closed lines, but between the tire and the chute or between curved parts (edges) of the zholobov forming a tire. Insulating gaskets are laid.

5. When described in pp. 1-4 method of application, in order to eliminate lopadan water and good 8 uninsulated parts of the cable 8 places cable connections, bell-shaped caps, so installed above the connection, so that water can not rise to the place of connection.

l, -