CN104078121A - Intrinsically safe instrument flexible cable for marine engineering - Google Patents

Abstract

This ampere of instrument flexible cable for ocean engineering relates to cable manufacturing technical field, especially the manufacturing technical field of this ampere of instrument flexible cable for ocean engineering. The cable comprises three groups of cable cores which are mutually twisted, wherein a total wrapping layer, a total shielding layer, an inner protection layer, an armor layer and an outer sheath layer are sequentially arranged outside the twisted three groups of cable cores; an outer drainage wire is arranged between the main lapping layer and the main shielding layer; filling is arranged between the three groups of wire cores and the total wrapping layer; every group sinle silk all includes that tinned copper wire restraints hank conductor, sets gradually insulating layer, unit shielding layer and unit around the covering outside tinned copper wire restraints hank conductor, sets up the internal current drainage line respectively between insulating layer and unit shielding layer. The invention has scientific, novel and reasonable structure, advanced process and good use performance, and not only has the characteristics of excellent low capacitance, low inductance, intrinsic safety, strong signal transmission capability, good anti-interference performance and the like; and has the performances of flame retardance, low temperature resistance, oil sludge resistance, water resistance and the like.

Description

Intrinsically safe instrument flexible cable for marine engineering

technical field

The invention relates to the technical field of cable manufacturing, in particular to the technical field of manufacturing intrinsically safe instrument flexible cables for marine engineering.

Background technique

With the transfer of global energy exploitation to the ocean, offshore oil and gas engineering is in the ascendant. Because offshore oil and gas projects are full of flammable and explosive oil and gas, in order to ensure the safety of electrical signal transmission in the equipment, special intrinsically safe instrument cables are required to match it. In the prior art, the instrument cables used in ships and marine engineering are generally arranged separately and wired independently, which takes up a large space, weak protection of the cables, and poor reliability.

Contents of the invention

The object of the present invention is to provide an intrinsically safe instrument flexible cable for marine engineering that can combine multiple instrument signal cables into one cable and can operate safely.

The present invention includes three groups of wire cores twisted with each other, and a total wrapping layer, a total shielding layer, an inner sheath layer, an armor layer and an outer sheath layer are sequentially arranged outside the three groups of twisted wire cores; An external drain line is arranged between the total wrapping layer and the total shielding layer; filling is arranged between the three sets of wire cores and the total wrapping layer; each set of wire cores includes a tinned copper bundle stranded conductor, and the An insulating layer, a unit shielding layer and a unit wrapping layer are sequentially arranged on the outer side of the tinned copper bundle stranded conductor, and inner drain wires are respectively arranged between the insulating layer and the unit shielding layer.

The conductor of the present invention is twisted by seven tinned copper wires; the insulating layer is low-density cross-linked polyethylene; the unit shielding layer and the overall shielding layer are aluminum foil polyester composite tapes, and the inner sheath is low-smoke halogen-free polyethylene; The outer sheath is low temperature resistant, oil sludge resistant, low smoke and halogen-free modified cross-linked polyolefin; the armor layer is braided by tinned copper wire. The invention has a scientific, novel and reasonable structure, advanced technology, and good performance. It not only has the characteristics of excellent low capacitance, low inductance, intrinsic safety, strong signal transmission ability, and good anti-interference performance; it also has flame retardancy, low temperature resistance, and oil sludge resistance. Water resistance and other properties.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

As shown in Figure 1, the present invention includes three sets of wire cores 1 twisted with each other, and a total wrapping layer 2, a total shielding layer 4, an inner sheath 5, an armor The outer sheath layer 6 and the outer sheath layer 7; the outer drain wire 3 is set between the total wrapping layer 2 and the total shielding layer 4; the filling 8 is set between the three sets of wire cores 1 and the total wrapping layer 2 Each group of wire cores 1 includes a tinned copper strand stranded conductor 9, and an insulating layer 10, a unit shielding layer 12 and a unit wrapping layer 13 are sequentially arranged on the outside of the tinned copper strand stranded conductor 9. Inner drain wires 11 are respectively arranged between the insulating layer 10 and the unit shielding layer 12 .

Claims (1)

1. ocean engineering intrinsically-safe instrument flexible cable, is characterized in that: comprise three groups of stranded cores mutually, set gradually total lapping layer, total screen, sheath, armour and external sheath layer in described three groups of stranded core outsides; Between described total lapping layer and total screen, external drainage line is set; Between described three groups of cores and total lapping layer, filling is set; Described every group of core includes tin-coated copper tow strand conductor, sets gradually insulating barrier, unit screen and unit lapping layer in described tin-coated copper tow strand conductor outside, between described insulating barrier and unit screen, interior drainage thread is set respectively.