CN201294119Y - Signal transmission cable - Google Patents

Abstract

The utility model belongs to the technical field of the signal transmission, in particular to a signal transmission cable, which comprises a cabling layer, a shielding layer and a sheath, wherein the cabling layer comprises two pairs or more than two pairs of twisted paired wires, and an insulating macromolecular foamed film is wrapped on the outer sides of each pair of the twisted paired wires, an insulating macromolecular foamed film is coated on the outer side of the cabling layer, and the twisted paired wires are differentiated by using different colors. The cable provided by the utility model has the advantages of stable structure, reliable performance, compact volume and lower industrial production cost.

Description

A kind of signal-transmitting cable

Technical field

The utility model belongs to the signal transmission technology field, relates to a kind of signal-transmitting cable.

The utility model background

Along with the develop rapidly and the progress of field of telecommunications, electronics, communication apparatus widely apply, accurate day by day, complexity and multifunction, and various electronic equipment is subjected to the unsettled puzzlement of signal-transmitting cable quality all the time.Because at present transmission cable has all adopted technology such as high-tech manufacturing, so with regard to a system, the construction of cable and electrical quality are the most serious, the processing internal signal transmission that it can be appropriate again can be with the system that the is sent to outside of the signal integrity of internal system.Therefore, equipment plays an important role in transmission with transmission cable.Because the digital simulation signal handling equipment of prior art is bulky with cable, performance is inferior, and the defective of cable itself can influence the signal quality of transmission, thus the interference signal treatment facility, and this is very disadvantageous for signal processing.Because complex structure, it is its assurance that high-end devices also must be arranged in addition, and difficulty of processing, manufacturing cost are higher.The signal type of attachment is that many point-to-points are fixedly connected between existing field apparatus or laboratory equipment, and there is the defective that wiring is complicated, use inconvenience in this kind connected mode.

VDSL cable (Very-high-bit-rate Digital Subscriber loop cable) very-high-bit-rate digital subscriber loop cable is applicable to the high speed transmission system of broadband network.Briefly, VDSL is exactly the quick version of ADSL.Use VDSL, pass speed under the maximum in the short distance and can reach 55Mbps, uploading rate can reach 19.2Mbps, even higher.At present, use these type of VDSL dedicated transmissions cable great majority to take import at home, domestic also do not have a reliable manufacturing experience.The cable of now taking in the domestic VDSL system equipment that mostly is external import perhaps uses some volumes big, poor stability, expensive other cables as an alternative, result of use is difficult to reach aspiration level.Guarantee its stability of structure by high end instrument and the special equipment that involves great expense often and produce this series products abroad, reliability.More external in industry manufacturers have caused great monopolization to this type of cable, and great restriction has been carried out in the domestic market.

The utility model content

The purpose of this utility model is the above-mentioned deficiency at prior art, a kind of Stability Analysis of Structures, dependable performance, volume compact, signal-transmitting cable that industrial manufacturing cost is lower are provided, this kind cable, be applicable to VDSL equipment, also be applicable to the industry spot and the indoor scenarios that need a large amount of analog or digital signals of transmission.For this reason, the utility model adopts following technical scheme:

A kind of signal-transmitting cable, comprise stranding layer, screen and sheath, it is characterized in that, the stranding layer comprises that two pairs or more strand is to line, each pair twist is surrounded with insulation macromolecule foaming film outward to line, the stranding layer is surrounded with insulation macromolecule foaming film outward, and strand is distinguished without color mutually to adopting between the line.

As preferred implementation, above-mentioned signal-transmitting cable, insulation macromolecule foaming film are environmental protection insulation macromolecule PP foam films; Strand has 24 pairs to line, according to the hierarchical sequence symmetric arrays of 2+8+14 from inside to outside; Between screen and stranding layer, indulge and put a ground wire; The sheath that is adopted is an environmental protection low smoke and zero halogen sheath, and it is provided with tear line.

Compared with prior art, this kind cable has following advantage:

● cost is low.

In present same purposes product, other cables with same function, manufacturing price is quite expensive, and need to adopt expensive import manufacturing equipment to guarantee its structural stability, its cost of equipment is quite surprising, cause the product price height, the price of this cable is feared thereby form the numerous domestic Virtual network operator.The signal-transmitting cable that the utility model provides can substitute the import like product fully, and its performance, structural stability all meet or exceed external like product, and through client's use test, fully can import substitutes.

● Stability Analysis of Structures.

Present same purposes product not only costs an arm and a leg, and its performance also is other people's worry, and unsettled structure causes the instability of its technical indicator.The utility model is by the change to its structure, add a kind of new macromolecule insulating environment-friendly material, make screen and conductor thread core be maintained fixed distance, increase the shielding external diameter, strengthen the distance between conductor and the screen, improve the electric property of outer layer pair, improve screen effect, thereby performances such as the impedance of assurance cable, decay reach the application technology index request.

● superior performance

The utility model adopts macromolecule insulating environment-friendly material to wrap up in and is attached between screen and the stranding layer, thereby, the overall performance electrical performance of cable is got a promotion.The insulating environment-friendly material that this dielectric constant is lower has played rock-steady structure in the construction of cable, reduce the cable attenuation index, improves the uniformity of cable electrical property, increases the antijamming capability of whole cable.

● work simplification

Present same purposes product, the manufacturing process complexity consumes great human and material resources, financial resources.And the transmission cable that the utility model provides, technology is simple, and Stability Analysis of Structures can realize on general device with few personnel.Thereby further reduce production costs, enhance productivity.

Description of drawings

Fig. 1 VDSL device-specific 100 Europe symmetrical expression transmission cable product overall structure generalized sections of the present utility model;

Among the figure: 1-24 twists line organizing 25 environmental protection insulation macromolecule PP foam films, the zinc-plated ground wire of 260.41mm, 27 two-sided aluminium strip screens, 28 tear lines, 29 environmental protection low smoke and zero halogen sheaths

Fig. 2 VDSL device-specific 100 Europe symmetrical expression transmission cable product unit structural profile schematic diagrames of the present utility model.

Among the figure: 30HDPE insulation, 310.41mm bare copper conductor

Embodiment

Below in conjunction with drawings and Examples the utility model is described further.

Present embodiment is VDSL device-specific 100 Europe symmetrical expression transmission cables, and referring to Fig. 1, transmission cable is made of stranding layer, screen and sheath.

The stranding layer by 24 pairs of lines to forming, divide three layers, arrange in order, arrange and press the arrangement of core different color sequences, the one-tenth cable structure is 2+8+14, interior core is wrapped PP foam films 25 in the stranding process, the stranding layer adopts PP foam films 25 parcels outward, and screen adopts two-sided aluminum composite belt 27, and central longitudinal is put a zinc-plated ground wire 26 of 0.41mm, sheath adopts environmental protection low smoke and zero halogen sheath 29, and sheath is provided with tear line 28.

Cable is 24 pair twists to line to group, every pair of color, and twisting pitch has nothing in common with each other.Color is respectively: white, blue line is right, white, right, white, the brown line of tangerine line is right, white, gray line is right, red, blue line is right, red, tangerine line to, red, green line is right, red, brown line is right, red, gray line is right, black, blue line is right, and is black, the tangerine line is right, black, green line is right, black, brown line is right, black, gray line is right, and is yellow, blue line is right, yellow, the tangerine line is right, yellow, green line is right, yellow, brown line is right, and is yellow, gray line is right, and white (indigo plant), blue line are right, (indigo plant), tangerine line are right in vain, and white (indigo plant), green line are right, and white (indigo plant), brown line are right.Strand to the structure of line as shown in Figure 2, among the figure, 30 is the HDPE insulating barrier, 31 is the 0.41mm bare copper conductor.

It is external to line that environmental protection insulation macromolecule PP foam films (twisting external to line) is wrapped in strand.Main effect:

A). the assurance strand to not out of order, causes align-err to line, prevents the cross-talk decreased performance.

B). structurally fixing of core in strengthening, guarantee to arrange according to the hierarchical sequence of 2+8+14, avoid the structural arrangement of interior lines in length is produced, making the mistake.The interior core of present embodiment has strand to 24 pairs on line, according to the hierarchical sequence symmetric arrays of 2+8+14, also can be 2 pairs, and 4 pairs, 12 pairs, 48 equities, or other number.

C) distance between increase outer layer pair and the aluminium strip increases screen effect, reduces cable attenuation, enhances product performance, and makes electrical property more even.

Interior lines are to wrapped PP foam films in the stranding process, be convenient to produce, and around-packing technology reduced and needed to cooperate stationary device mechanism in some production and processings, product structure is simplified very much, batch process needn't drop into the cost of equipment of great number and huge labour, thereby saves cost.This kind arrangement mode, even structure has strengthened the distance between screen and the conductor layer, stablized the impedance index, improved impedance stability, outer decay does not reduce, transmission performance is good, has improved the performance of anti-electromagnetic interference and electromagnetic radiation, guarantees that the high-speed transfer signal is steady and audible.

The signal-transmitting cable structure that the utility model proposes is not only applicable to VDSL equipment, is applicable to industry spot and indoor scenarios equipment yet.

Claims (5)

1. signal-transmitting cable, comprise stranding layer, screen and sheath, it is characterized in that, the stranding layer comprises that two pairs or more strand is to line, each pair twist is surrounded with insulation macromolecule foaming film outward to line, the stranding layer is surrounded with insulation macromolecule foaming film outward, and strand is distinguished without color mutually to adopting between the line.

2. signal-transmitting cable according to claim 1 is characterized in that, described insulation macromolecule foaming film is an environmental protection insulation macromolecule PP foam films.

3. signal-transmitting cable according to claim 1 is characterized in that, described strand has 24 pairs to line, according to the hierarchical sequence symmetric arrays of 2+8+14.

4. according to the signal-transmitting cable of claim 1, it is characterized in that, between screen and stranding layer, indulge and put a ground wire.

5. according to the signal-transmitting cable of claim 1, it is characterized in that described sheath is an environmental protection low smoke and zero halogen sheath, it is provided with tear line.

Images