CN210606782U

CN210606782U - Metal armored super six-type double-shielded cable

Info

Publication number: CN210606782U
Application number: CN201921808418.XU
Authority: CN
Inventors: 杨珺; 顾卫中; 陈澍; 沈文海; 王句
Original assignee: Suzhou Yongding Cable Technology Co ltd
Current assignee: Suzhou Yongding Cable Technology Co ltd
Priority date: 2018-10-26
Filing date: 2019-10-25
Publication date: 2020-05-22
Anticipated expiration: 2029-10-25

Abstract

The utility model discloses a metal armored super six-class double-shielded cable, which comprises a cable core, an inner sheath and an outer sheath from inside to outside in sequence, wherein the cable core comprises at least two groups of foaming core wires, each foaming core wire comprises a conductor and a skin-foam-skin insulating layer coated on the outer layer of the conductor, and the foaming core wires are coated with aluminum foils; a copper wire woven layer is arranged between the cable core and the inner sheath, and a metal armor layer is arranged between the inner sheath and the outer sheath. The utility model realizes the shielding between the wire core and the wire core by coating the aluminum foil outside the foaming wire core; the whole cable core is coated with the copper wire braided layer, so that the round shaping of the cable core is ensured, and meanwhile, the double shielding net is formed by the braided layer and the aluminum foil on the inner layer, so that the shielding effect of the cable is further improved, and the requirement of 5G communication can be met; the cable can be laid outdoors through the external metal armor layer.

Description

Metal armored super six-type double-shielded cable

Technical Field

The utility model relates to a communication cable field, concretely relates to metal armor's two shielded cable of super six types.

Background

The Ministry of industry and communications in 11 th Lat of 2017 releases a notice, formally starts the third stage of the 5G technology research and development test, and strives to realize the third stage of the test before the end of 2018. The general manager of china unicom indicates the general land beneficiaries in unicom international partner meeting in 2018, 6 and 26 months, the china unicom performs 5G trial business in 2019, and the general manager of china unicom performs formal business in 2020.

The shielding type data cable used for 4G network application in the existing communication is an ultra-five type cable (CAT5e), the transmission bandwidth is 100MHZ, the attenuation in hundred mega transmission is 19.1dB, the cable generally adopts a structure of one layer of aluminum foil shielding, but with the use of the 5G network, the transmission bandwidth requirement of the cable reaches above 500MHZ, and the attenuation in 500MHZ transmission is 45.3dB, which means that the requirement on the anti-electromagnetic interference performance of the communication cable is higher, so the one layer of aluminum foil shielding in the prior art can not meet the shielding requirement, in order to improve the transmission rate and the transmission bandwidth of the cable, reduce the signal transmission delay, reduce the crosstalk between the cables, the ultra-six type cable is developed on the basis of the ultra-five type cable: the existing pair shielding is to isolate a plurality of groups of foaming core wires by using a framework, for example, Chinese patent CN201720762007.6 discloses a method for isolating a pair of twisted wires by using a cross-shaped framework, but the method has three defects:

1. the outer diameter of the cable core is increased by the cross-shaped framework, so that the outer diameter of the whole cable is increased;

2. the single twisted pair and the outside are still shielded by one layer, and the double shielding effect cannot be achieved.

3. The cable lacks good protection, can not be applicable to outdoor adverse circumstances, does not have the bite-preventing and water-discharging requirements laid outdoors.

In summary, there is a need in the industry for a cable with dual shielding effect for outdoor applications.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a super six types of shielded cable that have double shielding effect of metal armor.

In order to solve the technical problem, the utility model provides a metal armored ultra-six type double-shielded cable, which comprises a cable core, an inner sheath and an outer sheath from inside to outside in sequence, wherein the cable core comprises at least two groups of foaming core wires, the foaming core wires comprise conductors and skin-foam-skin insulating layers coated on the outer layers of the conductors, and the foaming core wires are coated with aluminum foils; a copper wire woven layer is arranged between the cable core and the inner sheath, and a metal armor layer is arranged between the inner sheath and the outer sheath.

The utility model discloses a preferred embodiment, further include the copper wire weaving layer includes copper wire and fibre, the copper wire warp direction is densely covered, interweaves with the fibre or the copper wire of latitudinal direction sparse cloth, forms textile structure.

In a preferred embodiment of the present invention, the copper wire is a red copper wire or a tin-plated copper wire.

In a preferred embodiment of the present invention, the metal armor layer further comprises a base steel tape and a waterproof and breathable film attached to the base steel tape.

In a preferred embodiment of the present invention, the coating-foam-coating insulating layer is further provided with a coloring strip, and the coloring strip is embedded in the coating-foam-coating insulating layer.

In a preferred embodiment of the present invention, a tearing rope is disposed between the inner sheath and the braided copper wire layer.

In a preferred embodiment of the present invention, it is further included that the outer sheath is an anti-UV sheath.

The present invention further comprises a filling unit in the foaming core wire, wherein the filling unit is disposed on both sides of the conductor.

The utility model has the advantages that:

1. the aluminum foil covers the foamed wire cores to realize shielding between the wire cores;

2. the whole cable core is coated with the copper wire braided layer, so that the round shaping of the cable core is ensured, and meanwhile, the double shielding net is formed by the braided layer and the aluminum foil on the inner layer, so that the shielding effect of the cable is further improved, and the requirement of 5G communication can be met;

3. the cable can be laid outdoors through the external metal armor layer.

Drawings

Fig. 1 is a schematic cross-sectional view of an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of another embodiment of the present invention;

fig. 3 is the utility model discloses a 4 group shield effect test charts, wherein, a, b, c, d are four groups experimental data curve graphs, and L1 is standard shield effect curve, and L2 is this application shield effect curve.

The reference numbers in the figures illustrate: 1. the cable comprises a cable core, 2, an inner sheath, 3, an outer sheath, 4, a foaming core wire, 41, a conductor, 42, a skin-foam-skin insulating layer, 5, aluminum foil, 6, a copper wire braided layer, 7, a metal armor layer, 8, a tearing rope, 9 and a filling unit.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1, the metal armored ultra-six double-shielded cable of the present invention includes a cable core 1, an inner sheath 2 and an outer sheath 3 in sequence from inside to outside, in this embodiment, the cable core 1 includes four groups of foaming core wires 4, each group of the foaming core wires 4 includes a conductor 41 and a skin-foam-skin insulating layer 42 coated outside the conductor 41, each group of the foaming core wires 4 is separately coated with an aluminum foil 5, the aluminum foil 5 is longitudinally coated outside the foaming core wires 4, which can have a good shielding effect, and has a thermal insulation effect, and is convenient to use under a high temperature condition, the overlapping rate of the aluminum foil 5 in the preparation process is controlled within a range of 20% -45%, which is beneficial to improving the shielding effect, and each foaming core wire 4 is separately coated with one layer of the aluminum foil 5, so that the foaming core wires 4 can have a good shielding effect; a copper wire woven layer 6 is arranged between the cable core 1 and the inner sheath 2, the copper wire woven layer 6 comprises copper wires and fibers, the copper wires are densely distributed in the warp direction and are interwoven with the fibers or the copper wires which are sparsely distributed in the weft direction to form a textile structure, and the copper wire woven layer 6 is coated on the outer side of the cable core 1, so that the whole cable core 1 is shielded, and a double shielding effect is formed by combining the aluminum foil 5 coated outside each foaming core wire 4; and a metal armor layer 7 is arranged between the inner sheath 2 and the outer sheath 3.

In this embodiment, through the outer copper wire weaving layer that covers of whole cable core, guaranteed the round integer of cable core, constituted dual shielding net with the aluminium foil of inlayer simultaneously, to single foaming heart yearn, the outer aluminium foil that covers of sinle silk is first layer shielding net, and the copper wire weaving layer of cladding outside the cable core has constituted second floor shielding net, and the shielding effect of individual layer shielding net is good in prior art relatively to the shielding effect of cable has further been improved.

In addition, signal attenuation can be generated in the process of signal transmission in the cable, electromagnetic interference exists between the foaming core wire and the foaming core wire in the cable in the signal attenuation process, and electromagnetic interference also exists between two adjacent cables. This application adopts dual shielding net, and at the cable core outside cladding aluminium foil, form the aluminium foil shielding layer for electromagnetic interference between the shielding foaming heart yearn, at the whole cladding copper wire weaving layer in the outside of cable core, form copper wire braided net shielding layer, aluminium foil shielding layer and copper wire braided net shielding layer cooperation are used for shielding the electromagnetic interference between cable and the cable. Every process shielding net of electromagnetic interference that the in-process of signal produced at the decay all can play certain shielding effect to electromagnetic interference, and this application sets up the cable on double-deck shielding layer and compares individual layer shielded cable shielding effect further promotion among the prior art.

Referring to fig. 3, specifically, according to the experimental method of the transmission experiment of 3.3 parts in the industry standard YD/T838.1-2003 twisted pair/star twisted symmetric cable for digital communication, 4 sets of experiments for testing the shielding effect of the cable are provided, and compared with the shielding effect existing in the industry standard YD/T1019-2003 twisted pair cable for digital communication polyolefin insulation level, and the specific experimental data refer to table one:

watch 1

The skin-foam-skin insulation layer 42 is composed of an inner layer, a foam layer and an outer layer 3-layer structure: 1. inner layer: a solid layer extruded on the conductor 41, so that the conductor 41 and the insulating layer have good adhesion; 2. a foam layer: the layer requires high foaming degree (dielectric constant is reduced, long-distance transmission is facilitated), nitrogen is used as a foaming agent, and the nitrogen is injected into a polymer of an extruding machine at a constant flow rate under the action of pressure, so that dense and fine bubbles which are uniformly distributed are formed in the extruding process, and the high foaming degree is achieved; 3. outer layer: can ensure the whole insulating layer to have certain mechanical strength and good surface quality.

In this embodiment, a coloring strip is further disposed outside the skin-foam-skin insulation layer 42, the coloring strip is embedded in the skin-foam-skin insulation layer 42 and co-extruded with the skin-foam-skin insulation layer, and a four-layer co-extrusion technology is adopted in the process; the color bars can be arranged to facilitate distinguishing each group of foam core wires 4.

In this embodiment, metal armor 7 includes the basic unit steel band and attaches the waterproof ventilated membrane on the basic unit steel band, when having the armor function, has improved tensile and crushing resistance of cable when the pipeline is laid, still increases waterproof ventilated membrane, can further promote the dampproofing and waterproofing performance of cable.

In this embodiment, the copper wire used by the copper wire braid 6 is a red copper wire or a tinned copper wire, and such copper wire has good shielding property.

In this embodiment, be provided with between inner sheath 2 and the copper wire weaving layer 6 and tear rope 8, tear rope 8 and set up along the cable axial, when the construction was used, peel off inner sheath 2, metal armor 7 and the oversheath 3 of cable conveniently.

In this embodiment, the inner sheath 2 is a PVC sheath, and the outer sheath 3 is a UV-resistant sheath; the shielding PVC inner sheath, the metal armor and the anti-UV outer sheath have the advantages that the anti-electromagnetic interference and high flame retardance are met, and meanwhile, the functions of water resistance, ultraviolet resistance and rat bite resistance are added.

Referring to fig. 2, in another embodiment of the present invention, in order to ensure the roundness of the foam core wire 4, a filling unit 9 is further included in the foam core wire 4, the filling unit 9 is disposed at two sides of the gap between the two conductors 41, and is twisted together with the conductor 41 coated with the sheath insulation layer 42 to form a set of foam core wires 4; the advantages of such an arrangement are:

1. the torsion of the two conductors 41 during twisting and twisting is prevented from being too large, so that the performance of the conductors 41 is prevented from being influenced, and the torsion of the conductors 41 during twisting is reduced by adding the two filling units 9;

2. the roundness of the foaming core wire 4 is ensured, and the aluminum foil 5 is conveniently coated outside the foaming core wire 4 in the follow-up process.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. The metal armored ultra-six-type double-shielded cable sequentially comprises a cable core, an inner sheath and an outer sheath from inside to outside, and is characterized in that the cable core comprises at least two groups of foaming core wires, each foaming core wire comprises a conductor and a skin-foam-skin insulating layer coated on the outer layer of the conductor, and each group of foaming core wires is independently coated with an aluminum foil; a copper wire woven layer is arranged between the cable core and the inner sheath, and a metal armor layer is arranged between the inner sheath and the outer sheath.

2. The metal-armored super-six-category double-shielded cable according to claim 1, wherein the copper wire braided layer comprises copper wires and fibers, the copper wires are densely distributed in the warp direction and are interwoven with the fibers or the copper wires sparsely distributed in the weft direction to form a textile structure.

3. The metal-armored super-six-category double-shielded cable of claim 2, wherein the copper wires are red copper wires or tinned copper wires.

4. The metal-armored super-six-category double-shielded cable of claim 1, wherein the metal armor layer comprises a base steel tape and a waterproof breathable film attached to the base steel tape.

5. The metal-armored supersix-category double-shielded cable of claim 1, wherein the sheath-foam-sheath insulation layer is further provided with coloring strips, and the coloring strips are embedded in the sheath-foam-sheath insulation layer.

6. The metal-armored supersix-category double-shielded cable of claim 1, wherein a ripcord is disposed between the inner jacket and the copper braid.

7. The metal-armored super-six-category double-shielded cable of claim 1, wherein the outer jacket is a UV-resistant jacket.

8. The metal-armored supersix-category double-shielded cable of claim 1, further comprising filler cells within the foam core, the filler cells being disposed on both sides of the conductor.