CN102290133A - Underwater cable - Google Patents

Abstract

The invention discloses an underwater cable. The underwater cable is characterized in that the main body in the middle of the cable is formed by wire cores; the wire cores are formed by winding conductor isolation strips outside conductors containing water-resistant materials and extruding insulating layers outside the conductor isolation strips; a cable core is formed by stranding a plurality of wire cores and water-resistant fillers; and a cable core water-resistant isolation strip, an inner sheath, a braided reinforcing layer and an outer sheath are arranged outside the cable core in sequence. The underwater cable has the following beneficial effects: the underwater cable can be movably laid or fixedly laid and has stronger water resisting and waterproofing functions; therefore the cable can be safely and reliably operated underwater, safety production is ensured and the service life of the cable is simultaneously prolonged; and the cable is also provided with the metal armored structure, thus resisting damage of various nektons underwater and playing a role in shielding interference from various electromagnetic waves underwater.

Description

A kind of submerged cable

 

Technical field

The present invention relates to the electric wire field, specifically is a kind of at rated voltage 0.6/1kV and following under water with systems such as electric power, signal controlling, information transfer and the emission waterproof armoured cable that blocks water.

Background technology

Submerged cable is mainly used in the underwater electrical equipment, realizes functions such as electric power conveying, signal controlling, information transfer and emission.The structure of the submerged cable of existing rated voltage 0.6/1kV and following grade is: after afterwards twist plastics conductor strand back or restraint earlier, extrude plastic insulation, stranding wrapped afterwards or behind the armouring again extrusion molding material sheath form.After rubber class cable generally adopts thin copper wire multiply bundle to close, be twisted into again conductor (major part is the 5th a kind of soft copper conductor), extrude the rubber insulation layer, through the sulfuration after, the stranded stranding of multicore, extrude again sheath, the sulfuration form.Reality is, all kinds of electric equipments under water (as soundd navigation and ranging, underwater lighting etc.) are in its use, and various trips under water are biological, infringement or the cable socket of shellfish are handled blow-by, cause cable directly, vertically to be intake causes equipment burnout, distorted signals phenomenon to happen occasionally because of cable is subjected under water; After the cable that has had even just been installed, phenomenons such as equipment burnout just appearred in a power turn-on, can not continue to come into operation and scrapped thereupon cable.The main cause that above-mentioned phenomenon occurs is: 1) lack in the construction of cable block water, watertight composition, 2) cable lacks metal armouring layer or anti-electromagnetic interference.

Summary of the invention

Technical problem to be solved by this invention provides a kind of being difficult for by aquatic organism damage sheath, the submerged cable that the while water resistance is strengthened.

Main body in the middle of the submerged cable of the present invention, cable is a core, and described core is wrapped conductor isolation strip outside containing the conductor of material water-proof material, and the extruded insulation layer forms outside the conductor isolation strip; Some cores add to block water to fill and are twisted into cable core, set gradually cable core block water isolation strip, inner sheath, braiding reinforced layer and oversheath outside cable core.

But above-mentioned conductor preferably adopts the 5th class tinned conductor.

The present invention can be used as to move to lay also to can be used as fixedly and lays, its have stronger block water, water-proof function, thereby make cable under water can safety, reliability service, guarantee to keep the safety in production, prolong cable useful life simultaneously.Be provided with the metal armouring structure among the present invention again, possess the biological damage of anti-various trips under water, play the effect of various Electromagnetic Interference under the shield water.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Embodiment

As Fig. 1, submerged cable of the present invention, its main body is a core, and described core is wrapped conductor isolation strip 2 outside the conductor 1 that contains material water-proof material, and extruded insulation layer 3 forms outside conductor isolation strip 2; Present embodiment adopts four cores to add to block water fills 4,5 and is twisted into cable core, sets gradually cable core block water isolation strip 6, inner sheath 7, braiding reinforced layer 8 and oversheath 9 outside cable core.

1, technical process of the present invention:

Conductor through wire drawing and annealing usually by the 5th kind of filament diameter that the soft copper conductor structure is used →Bundle closes, multiple skein should add material water-proof material when closing and twisting again, and bundle closes lay ratio ≯ 25, stranded lay ratio internal layer ≯ 18, outer ≯ 14; It is dextrad that bundle closes direction, twists direction again and is left-hand, the outer overlapping wrapped isolation strip of multiple stranded conductor →Insulation extrudes →Insulated wire cores is carried out withstand voltage test →Stranding cable core gap places the filler that blocks water, and the stranding direction is a dextrad, stranding lay ratio ≯ 14, the cable core isolation strip that outward should wrapped one deck blocks water →Extrude inner sheath →Metal base transistor layer zinc-coated wire →Oversheath extrudes →Product detects and test.

Conductor bundle close or multiple stranded conductor in contain behind the material water-proof material heavy in section vertical bag isolation strip in the extruded insulation process that adds twining package tape, small bore and decide on insulating material, extruded insulation layer again, insulate then after withstand voltage test and to fill stranding with blocking water, the wrapped isolation strip that blocks water on the cable core, after extrude inner sheath, braided metal reinforced layer again.Extrude oversheath at last again.

The product technology standard of [example] SXEEU82-0.6/1 4 * 10 cables

1, conductor

Monofilament meets the requirement of TR type among the GB/T3953-2009.

Conductor structure: 7 * 12/0.40.The water blocking yarn that adds a 85dtex in the per share conductor

It is dextrad that the bundle of strand closes direction, and bundle closes lay ratio ≯ 25.

The multiple stranded conductor direction of lay is a left-hand, stranded lay ratio ≯ 14; The center adds the water blocking yarn of 2 85dtex, the polyester belt that the outer overlapping wrapped layer thickness of dextrad of conductor is 0.04mm.

D.C. resistance in the time of 20 ℃ ≯ 1.91 Ω/km.

2, insulation

Adopt XJ-30A second third Insulation Material, true qualities, digital coding 1,2,3,4, coding must use rubber printing ink, adopts the character wheel lettering.Distance is less than 10mm between each coding, and the insulated wire cores lettering is coated with medical talc powder.

The insulation nominal value is 1.2mm, and the insulation average thickness is not less than nominal value, and the insulation average thickness is not more than nominal value, and thinnest part thickness is not less than the 90%-0.1mm of nominal value.

Mechanical performance behind the insulation squeezing bag sulfuration: tensile strength ≮ 6.5N/mm2, elongation at break ≮ 250%.

The insulated wire cores withstand voltage test of should soaking, test voltage 2.4kV/5min does not puncture, after the test with core surface water wiped clean.

3, after-combustion

Insulated wire cores must through soak withstand voltage qualified after, carry out 10kV power frequency spark pressure test.

4, stranding

Stranding direction dextrad, stranding lay ratio ≯ 14, center and the peripheral waterproofing rope that adopts are filled.Cable core employing thickness is that the waterstop left-hand of 0.2mm is overlapping wrapped.Cable core shall be rounded up behind the stranding, tight, Stability Analysis of Structures.

5, inner sheath extrudes

Inner sheath adopts white Polyurethane EU, and the thickness nominal value is 2.0mm, and thinnest part thickness is not less than the 80%-0.2mm of nominal value.Inner sheath tensile strength ≮ 8.0N/mm2, elongation at break ≮ 175%.

6, braiding

The braided wires external diameter is 0.30mm, and the count degree is not less than 90%, braid answers uniformity, is convinced, closely, rounding, the dew scar must not be arranged.

7, oversheath

Oversheath squeezes and adopts the black pvc protective cover material, and the thickness nominal value is 1.2mm, and average thickness is not less than nominal value, and thinnest part thickness is not less than the 80%-0.2mm of nominal value.The oversheath surface can not have foaming, scratch, section pore-free, outward appearance should be closely, evenly, rounding, smooth, have no mechanical damage.

Sheath mechanical performance: tensile strength ≮ 10N/mm2, heat extends ≮ 175%.

8, cable surface lettering: factory of manufactory name, model, rated voltage, specification, length.

9, examination requirements

1, sampling test: physical dimension (conductor radical, monofilament maximum gauge, insulating sleeve thickness); The finished product withstand voltage test of soaking under hydraulic pressure 1.0Mpa: 20 ℃ of room temperatures, soaking time is not less than 24h, should stand 3.5kV/5min, does not puncture in this test to carry out the alternative conventional immersion withstand voltage test in back.

2, routine test: D.C. resistance, insulation resistance ≮ 500 Ω km should meet regulation requirement above; The conventional immersion of finished product withstand voltage test: 20 ℃ of room temperatures, soaking time is not less than 24h, should stand 3.5kV/5min, does not puncture.

Concrete application approach of the present invention is a lot, and the above only is a preferred implementation, should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvement, these improvement also should be considered as protection scope of the present invention.

Claims (2)

1. a submerged cable is characterized in that the main body in the middle of the cable is a core, and described core is wrapped conductor isolation strip (2) outside containing the conductor of material water-proof material (1), and extruded insulation layer (3) forms outside conductor isolation strip (2); Some cores add the filling that blocks water (4,5) and are twisted into cable core, set gradually cable core block water isolation strip (6), inner sheath (7), braiding reinforced layer (8) and oversheath (9) outside cable core.

2. submerged cable according to claim 1 is characterized in that conductor (1) but the 5th class tinned conductor of employing.