RU157826U1 - ALARM AND LOCK CABLE - Google Patents

Abstract

1. A cable for signaling and blocking, containing water-blocking material, insulated conductive conductors twisted into bundles, twisted into a core, on which a protective sheath made of PVC plastic compound, belt insulation, an aluminum sheath over which a pillow containing a layer of bitumen is laid, are sequentially applied polyvinyl chloride (PVC) plastic hose, paper tapes, steel tape armor, over which a protective PVC plastic hose is applied, characterized in that each conductive core is twisted from thinly x copper wires, the total cross-section of which is not less than the cross-section set for a single-wire core, these wires are twisted into bundles in pairs together with threads of water-blocking material, while the protective sheath is made of PVC compound of reduced fire hazard, the sheath of aluminum is solid, and the hose cushion and protective hose over the armor are made of PVC compound of reduced fire hazard. 2. The cable according to claim 1, characterized in that the protective sheath, the hose in the pillow and the protective hose on top of the armor are made of PVC compound of low fire hazard grade LS.3. The cable according to claim 1, characterized in that the paper tapes in the pillow in front of the steel armor are tarred paper. The cable according to claim 1, characterized in that the armor is made of two galvanized steel strips, imposed by a winding method with a gap.

Description

The proposed utility model relates to cable products, specifically to cables for signaling and blocking, waterproof, with protection against fire hazard.

Known thermoelectrode cable containing insulated conductors twisted into a core, which is superimposed belt insulation and sheath (see RF patent for PM No. 149105). In this cable, the insulation and sheath are made of polyvinylchloride (hereinafter - PVC) plastic compound with reduced fire hazard.

Closest to the proposed utility model is, in our opinion, a cable for communication, signaling and blocking systems according to the RF patent for ПМ No. 138270 - a prototype. The specified cable contains insulated copper conductive conductors with a thickness of 1.0 mm. The veins of four are twisted into bundles that are twisted into a common core. The cable contains a belt insulation, an aluminum sheath, a protective sheath made of polymer. The cable also includes a pillow, armor and a protective hose made of polymer. The volume inside the core is filled with water blocking material (hereinafter - VBM). The disadvantage of the prototype is that such a twist of the veins has a stiffness that does not allow bending the cable with a radius of less than 12 diameters. In this case, the polymer sheath and the hose do not adequately protect the cores from the fire hazard, which prevents the cable from being laid in the bundle. In addition, the VBM inside the core does not protect conductive conductors in bundles from moisture. These shortcomings degrade the performance of the cable.

The technical challenge is to improve the performance of the cable.

The technical result is achieved in that in the cable for signaling and blocking, containing water-blocking material, insulated conductive conductors are twisted into bundles that are twisted into a core, on which a plastic sheath, belt insulation, an aluminum sheath over which a pillow is applied, are sequentially applied containing a layer of bitumen, a hose made of plastic and paper tapes, armor made of steel tapes, over which a protective hose made of plastic is applied, each conductive core is twisted from thin copper salt, the total cross section of which is not less than the cross section established for a single-wire core, these wires are twisted in bundles in pairs together with threads of water-blocking material, while the protective sheath is made of PVC compound of reduced fire hazard, the aluminum sheath is made by continuous extrusion or longitudinal welding moreover, the hose in the pillow and the protective hose over the armor are made of PVC compound of reduced fire hazard.

In the cable, the protective sheath, the hose in the pillow and the protective hose over the armor are made of PVC compound of low fire hazard grade, the pillow contains tarps from tarred paper, the armor includes two galvanized steel tapes imposed by a winding method with a gap.

The utility model is illustrated in the drawing, which shows a cable for signaling and blocking in section. The cable contains conductive conductors 1 twisted from thin copper wires 2. The total cross section of the wires 2 is not less than the cross section of the wire with a diameter of 0.9-1.0 mm. Cores 1 have insulation 3 made of polyethylene (hereinafter - PE). The cores 1 are twisted in pairs together with threads 4 from the VBM into bundles 5 twisted into a common core 6. The core 6 is wrapped with tape 7 made of polyethylene terephthalate (hereinafter referred to as PET) and tape 8 from VBM. A protective sheath 9 is made on the tape 8, made of PVC compound of reduced fire hazard. A belt insulation 10 is applied to the shell, including a PET tape and two or three cable paper tapes superimposed by a method of winding with overlapping.

A control core 11 and an aluminum sheath 12 made by extrusion or longitudinal welding are superimposed on the belt insulation. A cushion is imposed on the casing 12, consisting of a layer of bitumen 13, a hose 14 made of low-fire hazardous PVC compound and tapes 15 of bitumen paper of the BKKB brand. Armor 16 of two galvanized steel tapes wound with a gap is imposed on the pillow. A protective hose 17 of PVC compound of reduced fire hazard is applied to the armor.

New in the cable for signaling and blocking is the implementation of conductive conductors twisted from thin wires, which gives greater flexibility. The protective sheath and hoses are made of PVC plastic compound brand LS, which reduces the fire hazard. Twisting the cores in pairs together with the threads from the VBM increases the moisture resistance.

According to the scheme described above, the applicant made an experimental batch of cable grade SBMVBABVShvng (A) -LS. Tests showed excellent results. The cable is well protected from moisture and fire, while the minimum bending radius was 9 outer diameters.

The technology of materials for the cable is described in detail in the patent of the Russian Federation on PM No. 83874. The cable is used in accordance with the design documentation for the alarm and interlock system, as well as the Electrical Installation Rules.

Claims (4)

1. A cable for signaling and blocking, containing water-blocking material, insulated conductive conductors twisted into bundles, twisted into a core, on which a protective sheath made of PVC plastic compound, belt insulation, an aluminum sheath over which a pillow containing a layer of bitumen is laid, are sequentially applied polyvinyl chloride (PVC) plastic hose, paper tapes, steel tape armor, over which a protective PVC plastic hose is applied, characterized in that each conductive core is twisted from thinly x copper wires, the total cross section of which is not less than the cross section established for a single-wire core, these wires are twisted in bundles in pairs together with threads of water-blocking material, while the protective sheath is made of PVC compound of reduced fire hazard, the sheath of aluminum is made continuous, and the hose the pillow and the protective hose over the armor are made of PVC compound of reduced fire hazard. 2. The cable according to claim 1, characterized in that the protective sheath, the hose in the pillow and the protective hose on top of the armor are made of PVC compound of low fire hazard grade LS. 3. The cable according to claim 1, characterized in that the paper tapes in the pillow in front of the steel armor are tarred paper. 4. The cable according to claim 1, characterized in that the armor is made of two galvanized steel tapes imposed by a winding method with a gap.

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