CN201681664U

CN201681664U - Data transmission cable

Info

Publication number: CN201681664U
Application number: CN2010202037900U
Authority: CN
Inventors: 颜君
Original assignee: CHANGSHU HL ELECTRIC WIRE CABLE Co Ltd
Current assignee: Changshou City Jing Hong Sheng communication Polytron Technologies Inc
Priority date: 2010-05-24
Filing date: 2010-05-24
Publication date: 2010-12-22
Anticipated expiration: 2020-05-24

Abstract

The utility model discloses a data transmission cable, which belongs to field of signal transmission cable technology. The data transmission cable comprises at least one pair of conductors, a first shielding belt, a second shielding belt, a weaving shielding sleeve, and an outer sheath. The characteristics are as follows: the insulating layer extending along the strength direction of the conductor is covered onto each conductor; the first shielding belt is wrapped outside the insulating layer; the second shielding belt is wrapped outside the first shielding belt; the weaving shielding sleeve is located outside the second shielding belt; and the outer sheath is located outside the weaving shielding belt. The characteristics are as follows: the first shielding belt longitudinally wraps the conductor along the length direction of the conductor, and the edge at one side of the length direction of the first shielding belt and the edge of the length direction of the other side are mutually joined or overlapped. The technical scheme is as follows: a binding bag is changed into a longitudinal bag, thereby controlling the signal attenuation; ideal transmission effect is presented under frequency of 20 GHz; compared with the prior art, the transmission speed is increased by six times, the connection between the servers which are equal to or smaller than 30m, between high-speed switches and between base-station servers; and the application cost is reduced.

Description

Data cable

Technical field

The utility model belongs to technical field of signal transmission cables, is specifically related to a kind of data cable.

Background technology

Data cable is called data cable for short, main but be used between the server with being not limited to, between the high speed switch and the connection between the base station server or the like, wherein, the connection between the server is comparatively general.In Chinese patent literature, can be seen in the technical scheme of data cable in a large number, recommend to have a kind of data cable that has conductive plastic shielding layer as CN2845120Y, and for example CN201051425Y introduces a kind of independent data cable that divides shielding that has, CN2758948Y discloses for another example anti-interference high-speed data cable, also disclose a kind of high-speed data cable with individually shielded twisted pairs as CN1183553C, and then as the public all a kind of star quad stranding type data cables that has of CN201081801Y, disclosing more and as CN101174495A has a kind of armored data cable, disclose more and as CN2758946Y again a kind of shielding high-speed data cable is arranged, also higher shielded enclosure external application data cable is arranged as CN2609126Y instruction, or the like.

In the above-mentioned patent, except CN201081801Y and CN101174495A, all be around improving the scheme that shield effectiveness proposes, strengthen humidity resistance, mechanical performance and the withstand voltage properties of cable when wherein the scheme that provides of CN201081801Y is intended to improve transmission performance, for the problem of signal attenuation of data cable, the foaming layer that patent has used foaming to add real core polyolefin layer insulation ensures.And the technical essential of CN101174495A is to improve the compressive resistance and the radiation proof mouse bite preventing of data cable, so this cable obviously is an outside cable and for burying use underground.

Except that above-mentioned patent documentation, a kind of DVI/HDMI high-frequency data transmission cable that also has CN2881897Y to recommend, this patent scheme has solved the in full reportedly problem that deal is heavy, volume is big and cost is high of transmission cable of prior art, not to providing the technology enlightenment as the signal attenuation of considering data cable and loop loss technical connotation; What the symmetric form data cable that CN201215742Y provides centered on is to save copper material and reduce cost, and more particularly, conductor is adopted copper cover aluminum, i.e. plated copper layer outside the aluminium core.

Comparatively typical as publication number that proposed by the applicant is a CN101447254A high speed parallel symmetric data cable, and this patent application scheme can make decay and loop loss effectively reduce; And set forth the reason that causes decay as the data cable (the 1st page in specification) in background technology that CN13177716C provides, the technical scheme that provides is by the capable announcement of Instructions Page 2 4-13, core be to the mask tape towards a face of conductor give thickness 〉=1 μ m and≤metal level of 10 μ m, this patent scheme can suppress decay to a great extent.Show by the product experiment that above-mentioned two patent program simulations obtain through the applicant, with length for≤30m is an example, in the time of in frequency is 3GHz, fluctuation does not appear, and when frequency is the 6-12GHz scope, just shown very big fluctuation, when more than or equal to 12GHz and smaller or equal to 20GHz, relaxation phenomenon is very serious, causes data transmission fails." one deck has the wrapped shielding of spiral; its transfger impedance descends by the rule of uniform pipe at the beginning; the sharply rising owing to the axial magnetic field effect of helix tube then, and therefore the performance of this shielding construction is very poor under high frequency " that set forth on this 513rd page of left hurdle of " electrical property of telecommunication cable and designing and calculating " book the 2nd chapter that has just in time confirmed China's publication.

Present situation is, mostly uses Optical Fiber Transmission in the occasion that transmission speed is high, and this is because due to the problem of signal attenuation of data cable effectively solved all the time.Yet the cost of Optical Fiber Transmission (is example with 30m) approximately exceeds about five times than the cost of data cable transmission.With the transfer of data between two servers of 30m is example, need two photoelectric conversion modules and one and be connected in two fiber assemblies between the photoelectric conversion module, the signal of telecommunication by first server output is converted to light signal through first photoelectric conversion module, be transferred to second photoelectric conversion module through fiber assembly, be converted to the signal of telecommunication by this second photoelectric conversion module again.The present expense of a covering device like this (system) is about the 500-600 dollar.Yet, if adopt the data cable mat, can directly be connected by data cable so, thereby save a pair of photoelectric conversion module with two servers for Optical Fiber Transmission, expense only is the 80-100 dollar.Therefore, fiber optic applications between the especially aforesaid server of short-range transmission, between the high speed switch and the transfer of data of base station server and so on be extremely uneconomic, only be the caving-in bash that people do something against one's will.

As from the foregoing, if can make data cable from prior art only can 3GHz degree (speed) bring up to 20GHz, and transmission steadily and not takes place than high attenuation, so just, alternative short-range Optical Fiber Transmission, and then can fully be applied between the aforesaid server, being connected of high speed switch and base station server, the purposes of data cable is expanded.For this reason, the applicant explores, and technical scheme described below produces under this background.

Summary of the invention

Task of the present utility model is to provide a kind of and can guarantees that the transmission signals decay is little and transmission speed fast and use and satisfy such as between the server, between the high speed switch and the data cable that requires of the transfer of data between the base station server.

Task of the present utility model is finished like this, and a kind of data cable comprises at least one pair of conductor, and each conductor is covered with the insulating barrier of the length direction extension of prolonging conductor outward; One first mask tape is wrapped in outside the described insulating barrier; One secondary shielding band is wrapped in outside described first mask tape; One braid shielded cover is positioned at outside the described secondary shielding band; One oversheath, be positioned at outside the described braid shielded band, be characterised in that described first mask tape is along the vertical bag of the length direction of described conductor, and the edge of the length direction of the edge of a side of the length direction of first mask tape and opposite side is engaged with each other or overlapping.

In a specific embodiment of the present utility model, described first mask tape is made of laminated polyester film, metal level and glue-line, metal level is combined in the surface of laminated polyester film towards a side of described conductor, and glue-line then is combined in the surface towards described secondary shielding band of laminated polyester film.

In another specific embodiment of the present utility model, described metal layer thickness is 10.1-20 μ m, and described glue-line is a PUR, and thickness is 0.5-5 μ m.

In another specific embodiment of the present utility model, described metal level is an aluminum membranous layer.

In another specific embodiment of the present utility model, described metal level is a copper film layer.

Also have in the specific embodiment of the present utility model, described metal level is the aluminum bronze rete.

More of the present utility model and in specific embodiment, described secondary shielding band is wrapped in outside described first mask tape in the mode of being wrapped.

In of the present utility model and then specific embodiment, described secondary shielding band has adhesive layer in the surface combination towards a side of described first mask tape.

Of the present utility model again more and in specific embodiment, described adhesive layer is a hot melt adhesive layer, its thickness is 0.5-5 μ m.

In again of the present utility model and then specific embodiment, also insert an earth connection that reduces the frequency dependence of cable attenuation along the length direction of conductor being used to of extending between the described pair of conductors.

The technical scheme that the utility model provides is owing to change the mask tape into vertical bag by being wrapped in the prior art, thereby signal attenuation is under control, when frequency still can show desirable laser propagation effect during at 20GHz, make transmission speed improve six times with respect to prior art (3GHz), can satisfy≤server of 30m scope between, between the high speed switch and the connection between the base station server, application cost is minimized more than five times.

Description of drawings

Fig. 1 is a specific embodiment structure chart of the present utility model.

Fig. 2 cuts open enlarged drawing for the A of Fig. 1.

Fig. 3 cuts open enlarged drawing for the B of Fig. 1.

Fig. 4 is the frequency characteristic comparison diagram of the data cable in the utility model data cable and the prior art.

Embodiment

For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present utility model and beneficial effect more, the applicant general elaborates in conjunction with the accompanying drawings in the mode of embodiment below, but to the description of embodiment all is not restriction to the utility model scheme, any according to the utility model design done only for pro forma but not substantial equivalent transformation all should be considered as the technical solution of the utility model category.

Ask for an interview Fig. 1, Fig. 2 and Fig. 3, in the present embodiment, by shown in Figure 1, provided two pairs of conductors 1 of identical in structure, also can increase the logarithm of conductor 1 certainly as required, as three pairs, four pairs or more, that is to say that conductor 1 both can lack to a pair of, but also the as many as number is right.When conductor 1 exists a pair ofly when above, braid shielded cover 4 and oversheath 5 still all only need one.Be that example is described with pair of conductors 1 below, squeeze insulating layer coating 11 with the habitual technology of electric wire processing industry, that is to say that insulating barrier 11 covers along the length direction of conductor 1 is crowded in the outside of each conductor 1.The pair of conductors 1 be covered with insulating barrier 11 is outer wraps up first mask tape 2 with vertical packet mode squeezing separately, and the notion of the vertical bag of being said is for being wrapped here, and therefore vertical bag also can be described as directly to be put or directly wrap.In the present embodiment, by shown in Figure 1, first mask tape 2 is that the length direction along conductor 1 directly wraps equally, and the edge of a side of the length direction of first mask tape 2 and the edge that is similarly length direction of opposite side are overlapping, overlapping Duplication is preferably 3-60%, be 10-40% preferably, 20-30% more preferably, be preferably 25%, the top Duplication of saying is meant the ratio of the overall width of the lap width and first mask tape 2, because lap too much can cause the unreasonable waste of first mask tape 2.Certainly, reach the degree of seamless combination rightly if can satisfy the dual-side edge of the length direction that makes first mask tape 2, just need not overlapping so.In view of this, whether the edge of the both sides of the length direction of first mask tape 2 needs overlappingly to be determined by the technological requirement of data cable in manufacture process.Length direction along conductor 1 between pair of conductors 1 is laid with the earth connection 6 that (inserting) helps to reduce the frequency dependence of cable attenuation, and this earth connection 6 also can be described as anti-interference line or row's interfering line.

Please in conjunction with Fig. 2, aforesaid first mask tape 2 comprises laminated polyester film 21 (being polyester film), metal level 22 and glue-line 23, wherein, metal level 22 is combined in the surface of laminated polyester film 21 towards a side of aforesaid conductor 1, be conducted with aforesaid earth connection 6, glue-line 23 then is combined in the surface of laminated polyester film 21 towards a side of the following secondary shielding band 3 that also will describe.Metal level 22 is aluminum membranous layer, copper film layer or aluminum bronze compound (mixing) rete that had both at the same time by aluminium and copper, the thickness of metal level 22 is preferably 10.1-20 μ m, is 11-16 μ m preferably, is 11.5-14 μ m better, be preferably 12 μ m, the utility model is selected 12 μ m.Metal level 22 and glue-line 23 all are combined on the polyester film 21 with coating method.The material of glue-line 23 is a PUR, and preferred thickness is 0.5-5 μ m, is 0.8-4 μ m preferably, is preferably 3 μ m, and present embodiment is selected 3 μ m.

Continue to see Fig. 1 and in conjunction with Fig. 3, the secondary shielding band 3 of being filled the post of (taking on) by polyester film is coated on outside aforesaid first screen 2 in the mode of being wrapped.By shown in Figure 3, have thickness to be preferably the adhesive layer 31 of 0.5-5 μ m at secondary shielding band 3 towards the surface coated of a side of first mask tape 2, the thickness preferably of adhesive layer 31 is 0.8-4 μ m, is preferably 3 μ m, present embodiment is selected 3 μ m, and preferably adopts PUR as adhesive layer 31.

Still see Fig. 1, outside aforesaid secondary shielding band 3, be arranged with braid shielded cover 4, this braid shielded cover 4 be braiding machine by special use with metal wire knitted outside secondary shielding band 3.Outside braid shielded cover 4, squeeze and establish oversheath 5, thereby obtain the finished product data cable.

Ask for an interview Fig. 4, this figure has illustrated the different-effect that is shown after tested of data cable of the present utility model and known data cable, the dashed curve of the dark color among the figure is represented the characteristic that data cable reflected in the prior art, and the light solid line among the figure is represented the characteristic that the utility model data cable shows.When frequency 3GHz with interior promptly≤during 3GHz, both frequency fluctuation difference is also not obvious; And more than 3GHz, especially when 3GHz-12GHz, the data cable in the prior art has then shown very unusual fluctuation, even and data cable of the present utility model still shows as more steady at 20GHz.Therefore, show by contrast test, the frequency of data cable of the present utility model can be brought up to 20GHz with the 3GHz in the prior art, frequency improves about more than 6 times, transmission speed is also corresponding to reach (raising) more than 6 times, thereby can adapt to fully with short distance as the connection between the server of≤30m distance, being connected between connection between the high speed switch and base station and the server, or the like, making prior art dependence optical fiber connect to change into adopts cable to be connected to become possibility, help to reduce investment cost, therefore to can yet be regarded as be a ultimate attainment technical scheme to the utility model, can embody the good commercial using value.

Claims

1. a data cable comprises at least one pair of conductor (1), the outer insulating barrier (11) that is covered with the length direction extension of prolonging conductor (1) of each conductor (1); One first mask tape (2) is wrapped in outside the described insulating barrier (11); One secondary shielding band (3) is wrapped in outside described first mask tape (2); One braid shielded cover (4) is positioned at outside the described secondary shielding band (3); One oversheath (5), be positioned at outside the described braid shielded band (4), it is characterized in that, described first mask tape (2) is along the vertical bag of the length direction of described conductor (1), and the edge of the length direction of the edge of a side of the length direction of first mask tape (2) and opposite side is engaged with each other or overlapping.

2. data cable according to claim 1, it is characterized in that described first mask tape (2) is made of laminated polyester film (21), metal level (22) and glue-line (23), metal level (22) is combined in the surface of laminated polyester film (21) towards a side of described conductor (1), and glue-line (23) then is combined in the surface towards described secondary shielding band (3) of laminated polyester film (21).

3. data cable according to claim 2, the thickness that it is characterized in that described metal level (22) are 10.1-20 μ m, and described glue-line (23) is a PUR, and thickness is 0.5-5 μ m.

4. according to claim 2 or 3 described data cables, it is characterized in that described metal level (22) is an aluminum membranous layer.

5. according to claim 2 or 3 described data cables, it is characterized in that described metal level (22) is a copper film layer.

6. according to claim 2 or 3 described data cables, it is characterized in that described metal level (22) is the aluminum bronze rete.

7. data cable according to claim 1 is characterized in that described secondary shielding band (3) is wrapped in outside described first mask tape (2) in the mode of being wrapped.

8. according to claim 1 or 7 described data cables, it is characterized in that described secondary shielding band (3) has adhesive layer (31) in the surface combination towards a side of described first mask tape (2).

9. data cable according to claim 8 is characterized in that described adhesive layer (31) is a hot melt adhesive layer, and its thickness is 0.5-5 μ m.

10. data cable according to claim 1 is characterized in that also inserting between the described pair of conductors (1) earth connection (6) that reduces the frequency dependence of cable attenuation along the length direction of conductor (1) being used to of extending.