RU190640U1 - CABLE FOR SIGNALING AND LOCKING WITH PROTECTION AGAINST RODENTS - Google Patents

Abstract

The utility model relates to cables intended for installation in rail transport tunnels. The technical task is to increase the safety of operation of electric trains in subway tunnels. The cable contains conductive wires 1, covered with insulation 2. The wires are twisted together with water-blocking (XB) threads 3 in bundles 4. The bundles are wrapped with a tape winding method made of WB material 5. Bundles are twisted into a core 6. WB tape 7 and tape 8 made of polyethylene terephthalate are successively applied to the core by the winding method. Belt insulation 9 of PVC plastic, as well as screen 10 of aluminoflex, are superimposed on the winding of the core. The cable contains protective armor from rodents in the form of a glass fiber sheet 11, which is superimposed on the inner shell 12 of polyethylene. On a twist of glass rods 11 by extrusion a protective hose 13 made of polyethylene is applied. 5 hp f-ly, 1 ill.

Description

The proposed utility model relates to cables intended for installation in subway tunnels.

Known cable according to the patent of the Russian Federation on PM No. 164841, containing insulated conductors (hereinafter referred to as cores), a water blocking material, belt insulation, a screen of aluminoflex and a protective outer hose made of plastic. Also known is a cable for rolling stock according to patent No. 110533, which contains insulated conductors twisted into a core, a copper screen and a plastic sheath.

The closest, in our opinion, to the proposed utility model is a cable for rolling stock according to the patent of the Russian Federation No. 113861 - a prototype. The specified cable contains insulated conductors twisted into a core, thermal protection from silicone film, a screen made of copper wire, as well as a protective sheath in the form of a braid made of glass fiber, which is impregnated with heat-resistant varnish.

The disadvantages of the prototype include the fact that it is practically not protected from rodents. As practice shows, the cable in the subway is constantly exposed to attacks of rats, which have taken root in warm tunnels and gnaw through cable insulation. The usual methods of rodent control (toxic gases, chemicals) are not applicable here, given the ramification of the metro tunnels and its saturation with passengers. In addition, this cable is not sufficiently protected from high humidity, which is present in the subway tunnels.

The technical task is to increase the safety of operation of electric trains in tunnels by protecting electrical equipment of rail transport from gnawing animals, as well as from exposure to high humidity.

The technical result is achieved by the fact that the cable for signaling and blocking, containing insulated copper conductors, is twisted together with water blocking threads into bunches that are wrapped with water blocking tapes, twisted into a common core, onto which a water blocking tape is wound, a tape made of polyethylene terephthalate, and an inner sheath of polymer, armor made of flexible glass material, is characterized in that said armor is made in the form of a glass-fiber sheet, which is superimposed on the inner shell, while The shield hose is laid on the glass fiber winding.

In the cable, the conductors can be made of stranded, twisted from thin copper wires, or single-wired, from copper wire with a diameter of 0.9 mm or 1.0 mm. In the cable, the inner sheath and protective hose can be made of polyethylene, while the core insulation can be applied to the core from polyvinyl chloride (PVC) plastic. In the cable, a screen of aluminum-polyethylene film (aluminoflex) can be applied to the belt insulation.

The utility model is illustrated in the drawing, which schematically shows the cross-section of the proposed cable.

In the specific example, the cable contains conductors 1 covered with insulation 2. The conductors can be single-wired, from annealed copper wire with a diameter of 0.9 mm or 1.0 mm, or multi-wired, twisted from copper wires with a total cross section from 1.0 to 4.0 mm ² . Insulation 2 is made of polyethylene. The veins are twisted together with the water-blocking (hereinafter - WB) threads 3 in bundles 4. The bundles are covered with windings 5 of WB tape. The bundles are stranded to a common core 6. A winding is applied to the core, which contains WB tape 7 and tape 8 made of polyethylene terephthalate (hereinafter PET). Belt insulation 9 of PVC plastic and screen 10 of aluminoflex are applied to the core winding. The cable contains protective armor in the form of a glass fiber sheet 11, which is superimposed on the inner shell 12 of polyethylene. The shell 12 is imposed on the screen 10 or directly on the winding of the core 6, if under the operating conditions in the cable device does not need the screen and belt insulation. On the glass fiber winding 11, a protective polyethylene hose 13 is applied.

The proposed cable has a number of improvements compared with the prototype. The water-blocking material protects the wires from high humidity; glass-fiber winding protects the cable from rodents.

The proposed cable does not contain imported materials, all elements of the cable structure are produced by domestic industry.

Produce the proposed cable according to traditional technology on the well-known equipment. Conductors are made of copper rod, manufactured according to GOST R53803-2010. Overlay insulation on the conductors produced sequentially on the extrusion equipment. The twisting of the insulated conductors is carried out on a cigar-shaped machine. The twisting of the bundles of the cores in the core is carried out on lamination-type twisting machines. The winding of the bundles of the strands of the polymer film is produced on tape wrapping machines. Glass bars are made according to TU2296-001-98155183-07. Poviv of glass rods perform on lamination type twisting machines.

According to the scheme described above, the applicant’s enterprise has manufactured a number of cable prototypes that are marked: SBMBBPU, SBVPPU, SBMBBEPPU and SBVBEPPU for laying in subway tunnels. Tests have shown that the protective armor of the cable in the form of glass strand from the glass rods reliably protects the cable conductors from rodents, and the water-blocking material provides protection against high humidity.

The proposed cable is environmentally friendly. Under established operating conditions, the cable does not emit harmful products that are hazardous to the human body and pollute the environment.

The cable is used according to the rules of installation of electrical installations and design documentation in relation to the laying of cables in tunnels and the installation of electrical equipment on rolling stock of rail vehicles.

The applicant has begun the formation of a portfolio of orders for the developed cable products with high moisture resistance and protection from rodents.

Claims (6)

1. Cable for signaling and blocking with protection against rodents, containing insulated copper conductor wires, are twisted together with water blocking threads into bundles that are wrapped with water blocking tapes, twisted into a common core, onto which a water blocking tape is wound, a tape made of polyethylene terephthalate, an inner sheath of polymer, armor made of flexible glass material, characterized in that said armor is made in the form of a glass fiber sheet, which is superimposed on the inner shell, while the protective hose is superimposed on the windings of glass. 2. The cable according to claim 1, characterized in that the conductive wires are made of multi-wired. 3. The cable according to claim 1, characterized in that the conductive wires are made of single-wire. 4. Cable according to Claim. 1, characterized in that the inner shell and the protective hose are made of polyethylene. 5. The cable according to claim 1, characterized in that the core is superimposed with a belt insulation of PVC plastic. 6. Cable according to claim 1, characterized in that a screen of alumina film (aluminoflex) is applied to the belt insulation.

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