RU153801U1 - ALARM AND LOCK CABLE - Google Patents

Abstract

1. A cable for signaling and blocking, including armor made of steel tape, insulated copper conductive conductors twisted into bundles, twisted into a common core filled with water-blocking material, placed in a polymer sheath, on which a cushion of creped paper is laid, on which aluminum is applied a shell on which a cushion is applied, comprising at least one layer of bitumen and a protective hose made of polyethylene, characterized in that the conductive wires are twisted into bundles together with water-blocking threads, each bundle is wrapped with a water-blocking tape, the voids between the bundles are filled with additional water-blocking threads, while this pillow contains a tarred paper tape superimposed on the specified protective hose, and the cable armor is made of galvanized steel. 2. The cable according to claim 1, characterized in that the aluminum sheath is made of at least twice the thickness. The cable according to claim 1, characterized in that the bitumen paper tape is applied to the protective hose by wrapping with overlap. 4. The cable according to claim 1, characterized in that the armor is made of two galvanized steel strips by a winding method with a gap. 5. The cable according to claim 1, characterized in that an additional protective hose made of polyethylene is applied to the armor.

Description

The proposed utility model relates to cable products, specifically to cables for signaling and blocking.

Known cables for signaling and blocking (hereinafter referred to as cables) containing insulated conductive wires twisted into elementary bundles that are twisted into a core on which a protective sheath is applied (see, for example, RF patent for PM No. 109906). A cable is also known in which the space between the conductive conductors is filled with a hydrophobic aggregate. The protective cover of this cable includes armor, a protective hose and other elements (see RF patent for ПМ No. 411183).

The closest, in our opinion, to the proposed utility model is a cable brand SBPZABPShp (prototype), developed by JSC "VNII cable production" (hereinafter - VNIIKP). The prototype device is disclosed in the "Technical Conditions" TU 16.K71-297-2000, published by VNIIKP. The specified cable contains copper conductive cores insulated with polyethylene. The cores are twisted into bundles that are twisted into a common core. To protect against moisture, the space between the bundles is filled with a hydrophobic aggregate. The core is placed in a shell made of polyethylene (hereinafter - PE). A belt insulation consisting of paper and PE tapes is applied over the shell. To protect against electromagnetic fields, an aluminum sheath is applied to the belt insulation. To protect against moisture, a cushion is applied to the shell, consisting of a layer of bitumen, a PE hose, a crepe paper winding, and a second layer of bitumen. For durability, armor from steel tapes is imposed on the pillow. To protect against corrosion, an outer cover is applied to the armor, including a layer of bitumen and a protective hose made of polyethylene.

The disadvantages of the prototype include the complexity of the technology associated with filling the core with a hydrophobic mass, the manufacture of pillows with two layers of bitumen. Armor made of ordinary steel is more susceptible to corrosion. In addition, currently known regions where an abnormally high electromagnetic background is detected, from which enhanced protection is required.

The technical task is to increase manufacturability, simplifying the device, providing protection against corrosion and electromagnetic fields.

The technical result is achieved by the fact that in the cable for signaling and blocking, including armor made of steel tape, insulated copper conductive wires twisted into bundles that are twisted into a common core, placed in a polymer sheath filled with water-blocking material, on which an aluminum sheath is applied, on which cushion is applied, including at least one layer of bitumen and a protective hose made of polyethylene, these conductive wires are twisted into bundles together with water-blocking threads, each bundle is wound water-blocking tape, the voids between the bundles are filled with additional water-blocking threads, while this pillow contains tarred paper tape superimposed on the specified protective hose, and the armor of the cable is made of galvanized steel.

In the cable, the aluminum sheath can be made of at least twice the thickness. In the cable, tarred paper tape may be applied to said protective hose by overlapping winding. In the cable, the armor can be made of two galvanized steel strips by the winding method with a gap. In the cable, an additional protective hose made of polyethylene can be applied to the specified armor.

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

In a specific embodiment, the cable for signaling and blocking contains copper conductive conductors 1, on which polyethylene insulation is applied 2. Between the insulated conductors 1 there are water-blocking (hereinafter - WB) threads 3. The conductors 1 are twisted together with the WB threads 3 into bundles 4. Bundles 4 wrapped in WB tapes 5. Between bundles 4 there are additional WB threads 6. Bundles 4 are twisted together with WB threads 6 into core 7, so that all voids between bundles are filled with WB threads.

The core 7 is wrapped with a tape 8 made of polyethyleneterephthalate (hereinafter referred to as PET) and WB tape 9, over which a PE sheath is applied 10. A control core 11 and a waist insulation including a PET tape 12 and several cable paper tapes 13 are applied to the sheath 10. To protect the cable from electromagnetic fields, the core is placed in an aluminum shell 14. To protect against ultra-high electromagnetic fields, the shell 14 can be made, at the request of the customer, reinforced thickness, for example, doubled. A cushion is applied to the casing 14, which comprises a layer of bitumen 15, a protective PE hose 16, and a winding 17 of tarred paper tape. The cable is equipped with 18 galvanized steel double tape armor. Armor 18 is imposed by a winding method with a gap. An outer cover from an additional protective PE hose 19 is applied to the armor 18.

The technical result consists in the fact that the use of water blocking (WB) filaments instead of a hydrophobic mass allows one to significantly automate cable production (improving manufacturability). The use of pre-made tape from bitumen paper, instead of a second layer of bitumen, also improves manufacturability and simplifies cable production. The manufacture of galvanized steel armor enhances its anti-corrosion properties (increased reliability). The reinforced thickness of the aluminum sheath protects the cable from an abnormally high electromagnetic background.

For the manufacture of the proposed cable using standard equipment of the cable industry. The cable production technology provides for drawing and annealing of copper wire for current-carrying conductors on drawing machines, insulation (including waist) using extrusion lines, twisting of conductors and WB threads into bundles and core on twisting machines of frame, lamp type or SZ machines - twisting, applying armor on an armored car, applying aluminum shell and protective PE hoses using extrusion lines. The application of aluminum cladding by longitudinal welding is provided.

According to the scheme described above, a pilot batch of cable products was manufactured with both a conventional aluminum sheath and a reinforced aluminum sheath. Tests of cable samples showed a good result.

A new and industrially applicable cable arrangement is proposed for legal protection by a utility model patent.

Claims (5)

1. A cable for signaling and blocking, including armor made of steel tape, insulated copper conductive conductors twisted into bundles, twisted into a common core filled with water-blocking material, placed in a polymer sheath, on which a cushion of creped paper is laid, on which aluminum is applied a shell on which a cushion is applied, comprising at least one layer of bitumen and a protective hose made of polyethylene, characterized in that the conductive wires are twisted into bundles together with water-blocking threads, each bundle is wrapped with a water-blocking tape, the voids between the bundles are filled with additional water-blocking threads, while this pillow contains tarred paper tape superimposed on the specified protective hose, and the cable armor is made of galvanized steel. 2. The cable according to claim 1, characterized in that the aluminum sheath is made of at least twice the thickness. 3. The cable according to claim 1, characterized in that the bitumen paper tape is applied to the protective hose by winding with overlapping. 4. The cable according to claim 1, characterized in that the armor is made of two galvanized steel strips by a winding method with a gap. 5. The cable according to claim 1, characterized in that an additional protective hose made of polyethylene is applied to the armor.

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