RU167954U1 - MOUNTING CABLE WITH LOW SMOKE AND GAS DISCHARGE - Google Patents

Abstract

The utility model relates to cable technology, specifically to mounting cables for industrial automation systems. The technical task is to simplify the cable, reduce the complexity of production, reduce the cost of installation. The cable contains conductive wires 1, coated with insulation 2, made of polyvinyl chloride (PVC) plastic compound of low fire hazard with low smoke and gas emission. Between the veins laid longitudinally yarn 3 of water blocking material (VBM). Veins 1 are twisted together with threads 3 from VBM into bundles 4. Shields 5 of alumoflex are superimposed on the bundles. The bundles 4 are twisted into a core 6. A tape 7 made of polyethylene terephthalate (PET) is applied to the core. On tape 7 superimposed tape 8 of VBM, longitudinally or winding with overlap. On the tape 8 superimposed a common screen 9 of alumoflex. On the screen 9 imposed a shell 10 of PVC compound of low fire hazard with low smoke and gas emission. Armor 11 is imposed on the shell. The armor is made of two galvanized steel tapes wound with a gap, or galvanized steel wires, or corrugated steel tape laminated with polyethylene, laid longitudinally with overlap. A protective hose 12 made of PVC compound of reduced fire hazard with low smoke and gas emission from the PPO 30-35 brand is superimposed on the armor. The cable is equipped with a tinned copper contact wire 13. 6 cp f-ly, 1 ill.

Description

The proposed utility model (PM) relates to cable technology, specifically to cables for mounting industrial automation systems.

Known optical cable according to the patent of the Russian Federation on PM No. 114379, including a polymer sheath made of polyvinyl chloride (PVC) plastic compound of low combustibility with low smoke and gas emission. Also known is the control cable according to the patent of the Russian Federation on PM 45554, containing conductive cores and waist insulation, including a winding in the form of a tape of polyethylene terephthalate (PET). These cables are not moisture proof.

Closest to the proposed PM is, in our opinion, the cable according to the patent of the Russian Federation for PM No. 117704 - a prototype. The specified cable contains conductive cores, belt insulation, a shield, a protective sheath made of PVC compound with low smoke and gas emission, armor. The cable is protected against moisture in the form of a water blocking material (VBM) made of silicone paste applied to the screen and armor.

The disadvantages of the prototype include the complexity of its manufacture, since the application of organosilicon paste on the cable elements is a rather time-consuming operation. In addition, if necessary, to protect the veins from moisture, it is necessary to use a cable with moisture-resistant armor and a shield, although armor and a shield are not always required. This circumstance increases the cost of installation work.

The technical task is to simplify the cable, reducing the complexity of production, reducing the cost of installation.

The technical result is achieved by the fact that the assembly cable with low smoke and gas emission is moisture resistant, containing water blocking material (VBM), conductive conductors, insulated with low-risk fire hazard PVC and PVC compound, twisted into the core, a belt insulation, including a winding made of polyethylene terephthalate (PET), a protective shell made of PVC compound of low fire hazard with low smoke and gas emission, armor, characterized in that the VBM is made in the form of threads and tapes, moreover, the threads from VBM are laid longitudinally between insulated conductive cores and twisted together with the indicated cores into a core, a tape from VBM is laid longitudinally on a PET winding or a winding with overlap, and a fireproof PVC hose with low smoke and gas emission is applied to the armor.

The cable is characterized in that a common screen of alumoflex or copper tape or in the form of a braid of tinned copper or copper wires is superimposed on the core. The cable differs in that the armor is made of two galvanized steel tapes wound with a gap, or steel galvanized wires, or from a steel corrugated tape imposed longitudinally with overlapping. The cable is characterized in that the steel corrugated tape is laminated with polyethylene.

The cable is characterized in that the conductive conductors are twisted two or three into bundles, which are equipped with individual shields of alumoflex, or copper tape, or tinned copper wires. The cable is characterized in that it is equipped with a tinned copper contact wire, laid under the common screen.

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

In a specific example, the cable contains conductive conductors 1 (conductors) coated with insulation 2. Insulation 2 is made of PVC compound of reduced fire hazard with low smoke and gas emission of PPI 30-30 brand. The cores can be single-wire, from soft copper wire, or multi-wire, twisted from thin copper or tinned copper wires. Between the veins laid longitudinally yarn 3 of water blocking material (VBM). The cores 1 are twisted in pairs together with the 3 threads from the VBM into bundles 4. Individual baffles 4 are superimposed on individual screens 5 of alumoflex. The twists are twisted into a core 6. A tape 7 made of polyethylene terephthalate (PET) is applied to the core. On tape 7 superimposed tape 8 of VBM, longitudinally or winding with overlap. Tapes 7 and 8 form a belt insulation with the function of protecting the cores from moisture. A total screen 9 of alumoflex is superimposed on the waist insulation. On the screen 9, a shell 10 of PVC compound of reduced fire hazard with low smoke and gas emission of the PPO 30-35 brand is superimposed. Armor is applied to the shell 11. The armor can be made of two galvanized steel tapes wound with a gap, or galvanized steel wires, or corrugated steel tape laminated with polyethylene, laid longitudinally with an overlap of 20-30%. A protective hose 12 made of PVC compound of reduced fire hazard with low smoke and gas emission from the PPO 30-35 brand is superimposed on the armor. The cable is equipped with a contact wire 13 of tinned copper wire. The wire 13 is laid under the screen 8 from the side of the aluminum coating.

The cable is used in accordance with the Electrical Installation Rules and design documentation for the industrial automation system.

New in the installation cable with low smoke and gas emission is that in it moisture protection is made in the form of threads and ribbons from VBM, with the threads laid longitudinally between the cores, and the tape applied to the belt insulation made of PET. Threads and tapes are made in advance, stored in the form of coils and rolls. In the manufacture of cable, threads and tapes from VBM are wound on a machine, like a regular PET tape. This solution reduces the complexity, simplifies production, reduces the cost of the cable. Since the VBM cable in the proposed cable is not attached to the screen or to the armor, this solution allows the cable to be protected against moisture without a screen and without armor, if their presence is not required by the automation system project. The proposed solution simplifies the installation of the cable while providing protection from moisture, reduces the cost of installation, since a cable without armor and a shield is cheaper. The cable option with corrugated armor has increased flexibility, which makes it possible to reduce the bending radius of the cable during installation. This solution improves the convenience of installing armored cable.

According to the scheme described above, the applicant’s enterprise manufactured a number of prototypes of an installation cable with low smoke and gas emission, moisture-proof for transmitting electricity and electrical signals in industrial electrical systems at voltages up to 500 volts at a relative humidity of up to 98% (at a temperature of + 35 ° C). Tests showed a good result. At the applicant’s enterprise, the formation of a portfolio of orders for cable products of this type has begun.

The new installation cable described above with low smoke and gas emission, moisture resistant, is proposed for legal protection by a utility model patent.

Claims (7)

1. Mounting cable with low smoke and gas emission, moisture resistant, containing water blocking material (VBM), conductive copper conductors, single-wire, or copper multi-wire, or tinned copper multi-wire, insulated with low fire hazard, low-smoke and gas emission PVC plastic twisted into core, belt insulation, including a winding of polyethylene terephthalate film (PET), a sheath made of PVC compound of low fire hazard with low smoke and gas emission of the grade PPO 30-35, armor, from characterized in that the VBM is made in the form of threads and tapes, and the threads from the VBM are laid longitudinally between insulated conductive cores and twisted together with them into the core, the tape from the VBM is applied longitudinally to the PET winding or with an overlapping winding, while the method is applied to the armor extrusion protective hose made of PVC compound of low fire hazard with low smoke and gas emission grade PPO 30-35. 2. The cable according to claim 1, characterized in that a common screen of alumoflex or copper tape or in the form of a braid of tinned copper or copper wires is superimposed on the core. 3. The cable according to claim 1, characterized in that the armor is made of two galvanized steel tapes wound with a gap. 4. The cable according to claim 1, characterized in that the armor is made of galvanized steel wires or of corrugated steel tape laid longitudinally with overlapping. 5. The cable according to claim 4, characterized in that the steel corrugated tape is laminated with polyethylene. 6. The cable according to claim 1, characterized in that the conductive conductors are twisted two or three together with threads from VBM into bundles, which are equipped with individual shields of alumoflex or copper tape or in the form of a braid of tinned copper or copper wire. 7. The cable according to claim 1, characterized in that it has a tinned copper contact wire laid along under a common screen.

Images