CN201219040Y

CN201219040Y - High-strength four-core stranded buoyant cable

Info

Publication number: CN201219040Y
Application number: CNU2008201502240U
Authority: CN
Inventors: 刘辉
Original assignee: CETC 23 Research Institute
Current assignee: CETC 23 Research Institute
Priority date: 2008-06-30
Filing date: 2008-06-30
Publication date: 2009-04-08
Anticipated expiration: 2018-06-30

Abstract

The utility model relates to a floating cable for underwater communication. A high strength four-core stranding type floating cable capable of satisfying the water-tight requirement of vertical and horizontal 4.5MPa resistance and the requirement of transmitting the very low frequency and extremely low frequency signal, with high tensile strength and zero-fault during repeatedly deploying and retracting the floating cable, and satisfying the requirement of cable with small specific gravity. The center signal wire uses the four-core stranding structure, and the stranding clearance of the four-core stranding structure uses the waterproof glue to fill; a layer of inner sheath is extruded outside the four-core stranding structure; a layer of reinforced layer is set besides the inner sheath; a layer of outer skinning is extruded outside the reinforced layer; a layer of foaming outer sheath is extruded outside the outer skinning. The cable uses four-core stranding structure to transmit the very low frequency signal and extremely low frequency signal and tests show that the floating cable can also satisfy the electric specification performance and watertightness performance index after being repeatedly bent by 1000 times.

Description

The stranded type buoyant cable of high strength four-core

Technical field:

The utility model relates to the buoyant cable that subsurface communication is used.

Background technology:

Buoyant cable has started to walk to study at home, but domestic research manufacturing situation of not seeing the four-core buoyant cable; The development of external buoyant cable is started in the seventies, now ripe, and a large amount of the use, and name of product is RG-384/U buoyant coaxial cable, its typical cable structure such as Fig. 1; Domestic employed buoyant cable is except the floating coaxial cable of RG-384/U, also has compound buoyant cable, this kind cable only increases one deck outer conductor again in the outside of the outer conductor of floating coaxial cable, has constituted the coaxial configuration of double-deck outer conductor, and its concrete structure as shown in Figure 2.

Among Fig. 1,1a is an inner wire; 2a is an insulating barrier; 3a is an outer conductor; 4a is an inner sheath; 5a is an enhancement layer; 6a is the foaming oversheath; 7a is solid oversheath.

Among Fig. 2,1b is an inner wire; 2b is an insulating barrier; 3b is an outer conductor; 4b is an inner sheath; 5b is an outer conductor; 6b is an enhancement layer; 7b is the foaming oversheath; 8b is solid oversheath.

Effect of each layer and constituted mode commonly used thereof are as follows among the figure: inner wire adopts single bare copper wire, is used for transmission signals; Insulating barrier adopts polyethylene, and insulation is used; Outer conductor adopts the copper strap wire braiding, is used for shielding; Inner sheath adopts polyethylene, is used to isolate enhancement layer and outer conductor; Enhancement layer adopts the aramid fiber braiding, and it is stressed to be used for tension; The foaming oversheath adopts polyethylene foamed, is used to reduce the density of cable; Solid oversheath adopts polyethylene, makes the horizontal watertight of cable ability.

Though this two kinds of cable signals transmission attenuation is little, only can transmit very low frequency signal, can't transmit very low frequency and extremely low frequency signal simultaneously; The outer conductor of braiding uses the back easily to rupture standing alternating bending, and shielding can't be communicated with seawater, can't receive signal, breaks down easily.In addition, in a single day this cable in use galls the solid oversheath of outermost, just can not satisfy the horizontal watertightness under the high hydraulic pressure, causes the last proportion of cable excessive, can't satisfy actual needs.In addition, these two kinds of cable tensile strength are low, and maximum only is 9kN.

Summary of the invention:

Technical problem to be solved in the utility model is to provide the high strength four-core stranded type buoyant cable, can satisfy anti-ly to require, can satisfy the requirement of transmitting very low frequency and extremely low frequency signal simultaneously and tensile strength height, folding and unfolding fault-free repeatedly, satisfy the little specification requirement of cable proportion to the watertight of 4.5MPa in length and breadth.

For realizing above purpose, the utility model is achieved through the following technical solutions:

The stranded type buoyant cable of high strength four-core is characterized in that: its center holding wire adopts the four-core lay configuration; The stranded gap of four-core lay configuration adopts the glue that blocks water to fill; Extrusion molding one deck inner sheath outside the four-core lay configuration; Outside inner sheath, be provided with one deck enhancement layer; The outer skinning of the outer extrusion molding one deck of enhancement layer; Outer skinning extrudes one deck foaming oversheath outward again.

Described four-core lay configuration can be a star-quad construction, also can be multiple twin formation.

Described oversheath adopts the high low density polyethylene (LDPE) material monolithic foaming structure of uniformity.Or the elastomer integral foam structure of employing uniformity.

The utility model brings following beneficial effect:

(1) this cable has adopted the four-core lay configuration, can transmit very low frequency signal and extremely low frequency signal, and electric property is stable, and through test, alternating bending still can be satisfied electricity function index and watertightness performance index after using 1000 times.

(2) adopt the glue that blocks water to fill the star quad stranding gap, can satisfy the direction waterproof of cable.

(3) extrusion molding one deck inner sheath can well be protected quadrature arrangement, make it in use stand big lateral pressure after its structure still can keep stablizing constant.

(4) adopt excellent integral foam material to form oversheath, do not need the solid oversheath of extrusion molding one deck again.

Description of drawings:

Fig. 1: typical cable structural representation in the prior art

Fig. 2: compound buoyant cable structural representation in the prior art

Fig. 3: the construction of cable schematic diagram of a preferred embodiment of the utility model

Embodiment:

Below in conjunction with the drawings and specific embodiments the utility model is further described:

Among Fig. 3,1c is a conductor; 2c is an insulating barrier; 3c is a lapping layer; 4c is an inner sheath; 5c is an enhancement layer; 6c is outer skinning; 7c is an oversheath.

Present embodiment has adopted four high insulated single wires of external diameter precision to form through star quad stranding; Twisting pitch only is 30mm; This cable adopts the glue that blocks water to fill the star quad stranding gap, to satisfy the direction waterproof of cable; Extrusion molding one deck inner sheath 4c again outside lay configuration is used for well protecting quadrature arrangement; At the enhancement layer 5c of inner sheath 4c peripheral hardware one deck aramid fiber material, skinning 6c outside extrusion molding one deck outside enhancement layer 5c, the last external diameter that can make cable is uniformity not only, and smooth smooth; Adopt the high low density polyethylene (LDPE) material monolithic foaming of proper ratio to form then as its oversheath 7c.High low density polyethylene (LDPE) expanded material can satisfy needed density, hardness, intensity and environmental stress crack resistance energy simultaneously by the proper proportion collocation, can make buoyant cable satisfy it simultaneously in length and breadth to the watertight requirement of 4.5MPa, and make oversheath 7c under frayed situation, still can keep horizontal watertightness, and do not need the solid oversheath of extrusion molding one deck again.

Claims

1, the stranded type buoyant cable of high strength four-core is characterized in that: its center holding wire adopts the four-core lay configuration; The stranded gap of four-core lay configuration adopts the glue that blocks water to fill; Extrusion molding one deck inner sheath outside the four-core lay configuration; Outside inner sheath, be provided with one deck enhancement layer; The outer skinning of the outer extrusion molding one deck of enhancement layer; Outer skinning extrudes one deck foaming oversheath outward again.

2, according to the stranded type buoyant cable of the described high strength four-core of claim 1, it is characterized in that: described four-core lay configuration can be a star-quad construction; It also can be multiple twin formation.

3, according to claim 1 or the stranded type buoyant cable of 2 described high strength four-cores, it is characterized in that: described oversheath adopts the high low density polyethylene (LDPE) material monolithic foaming structure of uniformity; Or the elastomer integral foam structure of employing uniformity.