RU187486U1 - FLEXIBLE REDUCED FIRE HOSE - Google Patents

Abstract

The utility model relates to the construction of electric cables and is intended for connecting electrical machines and household appliances and similar applications to the electric network with a rated alternating voltage up to 380/660 V at a nominal frequency of 50 Hz. The insulated conductive wires of the flexible wire are made of copper wires or aluminum alloy wires and are sheathed. The insulation and shell are made of low fire hazard PVC compound containing not more than 60% chalk and flame retardants. As a flame retardant, magnesium hydroxide, aluminum hydroxide or a mixture thereof is used. Increased tensile strength of the insulation and sheath, at least 12 N / mm, and elongation at break of at least 200%. The technical result is an increase in service life. 4 s.p. f-ly, 1 il.

Description

The utility model relates to the construction of electric cables and is intended for connecting electrical machines and appliances for domestic and similar use (electrical appliances and power tools for housing care and repair, washing machines, refrigerators, dryers, small-scale mechanization and other similar machines and devices) to electrical networks with a rated alternating voltage up to 380/660 V of a rated frequency of 50 Hz in conditions where requirements for increased fire safety are imposed.

State of the art

Known wire (patent RU 133651 publ. 29.10.2013), which contains a multi-wire conductive core of copper or copper alloy, aluminum or aluminum alloy core. The insulation is made of polymers of high heat resistance.

A flexible low fire hazard wire is also known (patent RU 49341 publ. 10.11.2005), selected for the prototype, which is made of copper conductive cores, and the insulation and sheath are made of low fire hazard polyvinyl chloride plastic compound.

A disadvantage of the known technical solutions is the insufficiently high service life.

The technical problem of the proposed technical solution is to expand the arsenal of funds for a similar purpose.

The technical result of the claimed solution is to increase the service life of the flexible wire due to the use of more fire-resistant PVC compound and to improve the insulation and sheath characteristics.

The technical result is achieved by the fact that in a flexible low fire hazard wire, including conductive conductors, on top of which insulation and a sheath of low fire risk PVC are applied, according to the proposed solution, the sheath and insulation are made of polyvinyl chloride plastic compound containing not more than 60% chalk and fire retardant, this average value of the tensile strength of the insulation and sheath is not less than 12 N / mm, and the elongation at break is not less than 200%.

Conductors can be made of aluminum alloy wires or copper wire.

As a flame retardant, you can use magnesium hydroxide or aluminum hydroxide, as well as their mixture.

Four or five insulated cores can be twisted into a core around a bundle.

From patent and scientific and technical sources, the totality of the features of the claimed technical solutions is unknown, which allows us to conclude that the criterion of novelty is met.

Brief Description of the Drawings

The utility model is illustrated in the figure, which shows a cross section of a five-core flexible wire of reduced fire hazard of the proposed design.

Utility Model Implementation

Flexible wire consists of conductive conductors 1 made of copper wires or aluminum alloy wires. Insulation 2 is applied to conductive conductors, sheath 3 is applied over insulated conductive conductors twisted into the core. Insulation 2 and sheath 3 are made of low fire hazard PVC compound containing not more than 60% chalk and flame retardant. As a flame retardant, magnesium hydroxide, aluminum hydroxide or a mixture thereof is used.

Insulation 2 must fit snugly against the twisted conductive conductors 1 and freely separate from them without damaging the insulation 2. The sheath 3 is laid in such a way that fills the gaps between the conductive conductors 1 twisted into the core, giving the flexible wire a round shape.

In preferred embodiments, four or five insulated cores are twisted into a core around a bundle 4.

The increased tensile strength of the insulation and sheath, which is at least 12 N / mm ² , and the elongation at break of at least 200% increase the resistance of the wire to external mechanical stresses and, consequently, increase the service life.

The resource of the inventive flexible wire, expressed in resistance to alternating bending deformations, is at least 35,000 (70,000) cycles (movements).

The utility model can be manufactured on equipment using well-known processes and materials.

Claims (5)

1. A flexible wire of reduced fire hazard, including conductive conductors, on top of which insulation and a sheath made of low-risk PVC compound are applied, characterized in that the sheath and insulation is made of polyvinyl chloride plastic compound containing not more than 60% chalk and fire retardant, while the average strength value at the gap of the insulation and the shell is at least 12 N / mm, and the elongation at break is at least 200%. 2. The flexible wire according to claim 1, characterized in that the conductive wires are made of aluminum alloy wires or copper wire. 3. The flexible wire according to claim 1, characterized in that magnesium hydroxide or aluminum hydroxide is used as a flame retardant. 4. The flexible wire according to claim 1, characterized in that a mixture of magnesium hydroxide and aluminum hydroxide is used as a flame retardant. 5. The flexible wire according to claim 1, characterized in that four or five insulated conductors are twisted into a core around the bundle.

Images