Digital communication optoelectronic composite cable

Abstract

The present invention discloses a digital communication optoelectronic composite cable, wherein four separation areas of a cross partition frame in a cable core are respectively provided with twisted wire groups, an optical fiber unit is provided at the core position of the cross partition frame, and a tensile filler is filled between the optical fiber unit cladding and the optical fiber outer sheath; the twisted wire groups are coated with a unit shielding structure, which includes a unit shielding corrugated belt and a unit shielding support ring supported at intervals; an inner sheath, a general shielding structure and an outer sheath are sequentially coated on the cable core from the inside to the outside; the inner sheath includes a sheath body, and a plurality of supporting ribs are provided on the inner wall surface of the sheath body, and the rib ends of the supporting ribs are respectively located on four circumferential surfaces; the general shielding structure includes a general shielding corrugated belt and a general shielding support ring supported at intervals. The optoelectronic composite cable can not only effectively suppress the flexibility of optical fiber and reduce light loss, but also both optical fiber and cable can transmit digital signals, and has a wider range of applications.

Description

Technical Field

[0001] The present invention relates to the technical field of digital communication, and in particular to an optoelectronic composite cable having a twisted pair digital communication cable and an optical fiber unit. Background Art

[0002] With the booming communications industry, data services are growing exponentially. Multimedia such as language, data and images need to be transmitted, so a larger network capacity and wider bandwidth are needed. Currently, the main digital network transmission media are high-value digital communication cables in twisted pair groups and optical fiber cables.

[0003] Twisted-pair digital communication cable is a commonly used network transmission medium. It is cheap and is the most cost-effective digital communication cable. It consists of eight insulated core wires twisted into four pairs of wires, which are then twisted into cables and finally squeezed into outer sheaths to make finished cables. However, in the existing cable structure, the relative positions of the wire pairs are fixed only by the outer sheath of the cable. The laying, pulling and twisting of the cable will produce traction, stretching and squeezing effects on the cable structure, causing the relative positions of the wire pairs to shift and change. Even in the process of cable coiling, its structural parameters will change. The instability of the cable structure will inevitably lead to the degradation of performance indicators such as input impedance, near-end crosstalk, far-end crosstalk and attenuation, which seriously restricts the improvement of the working frequency and data transmission speed of the data communication cable. In order to improve the transmission performance of the data cable, people have developed data cables that apply technologies such as cross-separated skeletons and various shielding structures, so that the transmission rate of the data cable continues to increase. The corresponding digital communication cables need to develop from category 5, category 5e, category 7 to category 8 and ultra-high transmission frequency communication cable products.

[0004] Optical fiber communication is a new transmission method of modern communication network. The birth and development of optical fiber communication is an important revolution in the history of telecommunications. Due to the rapid development of Internet services and the growth of audio, video, data and multimedia applications, there is a more urgent need for large-capacity (ultra-high speed and ultra-long distance) optical wave transmission systems and networks. Compared with previous electrical communications, the main difference between optical fiber communication and traditional electrical communications is that it has many advantages: wide transmission bandwidth and large communication capacity; low transmission loss and long relay distance; saving metal materials, which is conducive to the rational use of resources; strong insulation and anti-electromagnetic interference performance; strong corrosion resistance and radiation resistance. However, optical fiber is relatively expensive and cannot withstand tension. In particular, when the optical fiber is compressed from the side, the central axis of the fiber core will bend slightly, causing an increase in light loss, resulting in a decrease in transmission distance and transmission quality.

[0005] The current optoelectronic composite cable is actually a combination of optical fiber and power transmission copper wire, and can only be used as a single transmission connector; that is, it is only used to transmit optical signals and electrical energy. Optical fiber is used to transmit digital signals, while cables can only transmit electrical energy and not digital signals. This type of optical cable composite cable equipment has insufficient applicability and field adaptability, and cannot meet the user's multiple choices and different needs; the product is limited in scope of application and can only be used in situations where optical fiber transmits digital signals, but not in equipment that matches digital signal cables. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a digital communication optoelectronic composite cable, which can not only effectively suppress the flexibility of the optical fiber to reduce the light loss caused by micro-bending of the optical fiber, but also enable both the optical fiber and the cable to transmit digital signals, and has a wider range of applications.

[0007] In order to solve the above technical problems, the digital communication optoelectronic composite cable of the present invention includes a cable core and a cross partition frame filled in the cable core, and twisted wire groups are respectively arranged in the four partition areas of the cross partition frame, and an optical fiber unit is arranged at the core position of the cross partition frame, and the optical fiber unit includes a fiber core and an optical fiber outer sheath, the fiber core is surrounded by a cladding, and a tensile filler is filled between the cladding and the optical fiber outer sheath; each twisted wire group is coated with a unit shielding structure, and the unit shielding structure includes a unit shielding corrugated belt and a unit shielding support ring supported in the unit shielding corrugated belt at intervals; an inner sheath, a general shielding structure and an outer sheath are sequentially coated on the cable core from the inside to the outside; the inner sheath includes a sheath body, and a plurality of supporting ribs are arranged on the inner wall surface of the sheath body, and the rib ends of the supporting ribs are respectively located on four circumferential surfaces; the general shielding structure includes a general shielding corrugated belt and a general shielding support ring supported in the general shielding corrugated belt at intervals.

[0008] In the above structure, since the twisted pair groups are respectively located in the four partition areas of the cross partition frame, and the optical fiber unit is arranged at the core position of the cross partition frame, the structure surrounds the optical fiber unit in the center position of the four pairs of twisted pair groups and the cross partition frame, avoiding direct pressure on the optical fiber unit by side pressure, and effectively suppressing the increase in optical loss caused by micro-bending due to external pressure; at the same time, the optical fiber unit is filled with tensile fillers, which effectively enhances the tensile strength of the optical fiber unit, and the optical fiber is coated in the middle of the tensile filler, so that the optical fiber unit has a comprehensive mechanical strength to resist side pressure and axial tension, and effectively suppresses the optical fiber flexibility and micro-bending light loss caused by external force. In addition, since a number of supporting ribs are arranged on the inner wall surface of the sheath body of the cable inner sheath, the supporting ribs and the cross dividing frames form an effective grip on the twisted pair wire groups. At the same time, the ends of the supporting ribs are respectively located on four circular surfaces that can accommodate the twisted pair wire groups. On the one hand, effective grip is formed on the corresponding twisted pair wire groups to avoid displacement and stringing of the pair wire groups, and the cable core structure maintains a more stable and reliable position state. The holding structure also prevents the mutual embedding of the pair wire groups and avoids the interference caused by the mutual embedding of the pair wire groups. On the other hand, this holding structure greatly enhances the support contact area of ​​the twisted pair wire groups, reduces the contact stress of the wire group gripping, and plays a stabilizing role on the wire group in terms of position state and appearance structure, thereby ensuring the stability of various cable parameters, increasing the working frequency of the cable to transmit digital signals, and accelerating the data transmission speed. Also, because both the unit shielding structure and the overall shielding structure include a shielding corrugated belt and a shielding support ring supported in the shielding corrugated belt, the corrugated shielding corrugated belt not only has a relatively stable shielding performance, but also can enhance the bending flexibility of the wire group and the cable, avoiding bending, extrusion and deformation of the insulated single wire and the insulated conductor when the cable and the wire group are bent, and can effectively ensure the stability and firmness of the position of the insulated single wire structure; the annular shielding support ring embedded in the inner side of the corrugated belt can effectively support the pressure on the twisted wire group by external force, forming a reliable protection structure, improving the anti-extrusion mechanical properties of the cable or twisted wire group, not only can ensure the stability, coaxial capacitance, concentricity and ellipticity of the insulated single wire structure in the shielding layer, but also can avoid the occurrence of compression and breakage of the insulation and conductor, forming a dual effect of shielding and protection.

[0009] In a preferred embodiment of the present invention, the optical fiber unit has at least one fiber core, and each fiber core is surrounded by a corresponding cladding. The tensile filler is composed of aramid fiber yarn, which can form sufficient tensile strength.

[0010] In a preferred embodiment of the present invention, the twisted pair wire group is formed by twisting two insulated single wires, the insulated single wires include a conductor, and the conductor is sequentially coated with an insulating inner layer, an intermediate foam layer and an insulating outer layer. The three-layer insulation structure greatly reduces the working capacitance between the insulated single wires and reduces the transmission attenuation constant of the wire group.

[0011] In a preferred embodiment of the present invention, the unit shielding corrugated belt is a corrugated copper belt, and the unit shielding support ring is embedded in the corrugated groove corresponding to the unit shielding corrugated belt. The unit shielding support ring is made of carbon fiber, and the unit shielding support ring includes a unit upper support ring and a unit lower support ring, and the unit upper support ring and the unit lower support ring are mortised to each other by support ring tenons and support ring grooves. The structure is reasonable, easy to manufacture and assemble, and can effectively enhance the pressure bearing capacity of the support diagram.

[0012] In a preferred embodiment of the present invention, the overall shielding corrugated belt is a corrugated aluminum belt, and the overall shielding support ring is embedded in the corrugated groove corresponding to the overall shielding corrugated belt. The overall shielding support ring is made of carbon fiber, and the overall shielding support ring includes an upper support ring and a lower support ring, and the upper support ring and the lower support ring are mortised to each other by a plug-in tenon and a plug-in groove. The structure is reasonable, easy to manufacture and assemble, and the support ring has a strong pressure bearing capacity.

[0013] In a preferred embodiment of the present invention, the support ribs on the inner wall of the jacket body are arranged at intervals, and the diameter of the circumferential surface where the ends of the support ribs are located is equal to the outer diameter of the unit shielding structure. The support ribs corresponding to the same circumferential surface extend toward the circumferential surface from a perpendicular direction, and the support ribs are connected to the jacket body as a whole. The structure is more stable, and the firm gripping effect on the twisted wire group is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The digital communication optoelectronic composite cable of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] Figure 1 It is a schematic cross-sectional structure diagram of a specific implementation of a digital communication optoelectronic composite cable of the present invention;

[0016] Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of a unit shielding structure in the illustrated embodiment;

[0017] Figure 3 yes Figure 2 A schematic cross-sectional structure diagram of a unit shielding support ring in the structure shown;

[0018] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure of the upper support ring of the unit in the structure shown;

[0019] Figure 5 yes Figure 4 Left view of

[0020] Figure 6 yes Figure 3 A schematic diagram of the cross-sectional structure of the lower support ring of the unit in the structure shown;

[0021] Figure 7 yes Figure 6 Left view of

[0022] Figure 8 yes Figure 1 A schematic diagram of the cross-sectional structure of the inner sheath in the illustrated embodiment;

[0023] Fig. 9 yes Figure 1 A schematic cross-sectional view of the overall shielding structure in the illustrated embodiment;

[0024] Fig.10 yes Fig. 9 A schematic diagram of the cross-sectional structure of the total shielding support ring in the structure shown;

[0025] Fig.11 yes Fig.10 A left side view of the upper support ring in the structure shown;

[0026] Fig.12 yes Fig.10 Left side view of the upper support ring in the structure shown.

[0027] In the figure, 1 is a twisted pair, 2 is an insulated single wire, 21 is a conductor, 22 is an insulating inner layer, 23 is an intermediate foam layer, 24 is an insulating outer layer, 3 is a unit shield, 31 is a unit shield corrugated tape, 32 is a unit shield support ring, 33 is a unit upper support ring, 34 is a unit lower support ring, 35 is a support ring tenon, 36 is a support ring groove, 4 is a cross partition, 5 is an optical fiber unit, 51 is a fiber core, 52 is a cladding, 53 is a tensile filler, 54 is an optical fiber outer sheath, 6 is an inner sheath, 61 is a sheath body, 62 is a supporting rib, 7 is a total shielding structure, 71 is a total shielding corrugated tape, 72 is a total shielding support ring, 73 is an upper support ring, 74 is a plug-in tenon, 75 is a lower support ring, 76 is a plug-in groove, and 8 is an outer sheath. DETAILED DESCRIPTION

[0028] like Figure 1 The digital communication composite cable shown includes a cable core filled with a cross partition frame 4, and twisted wire groups 1 are respectively arranged in four separation areas of the cross partition frame 4. Each twisted wire group 1 is formed by twisting two insulated single wires 2. The conductor 21 of the insulated single wire 2 is sequentially coated with an insulating inner layer 22, an intermediate foam layer 23 and an insulating outer layer 24 from the inside to the outside.

[0029] An optical fiber unit 5 is arranged at the core position formed by the intersection of the cross wing plates of the cross partition frame 4. The optical fiber unit 5 includes two fiber cores 51 and an optical fiber outer sheath 54. Of course, the optical fiber unit 5 includes at least one fiber core 51, and the number of fiber cores depends on the specific design. Each fiber core 51 is surrounded by a cladding 52, and a tensile filler 53 composed of aramid fiber yarn is filled between the cladding 52 and the optical fiber outer sheath 54. Aramid fiber has high tensile strength and flexibility, which can better protect the fiber core and greatly improve the tensile strength of the optical fiber unit.

[0030] Each pair of twisted wires 1 is covered with a unit shielding structure 3. The cable core is covered with an inner sheath 6, a total shielding structure 7 and an outer sheath 8 from the inside to the outside.

[0031] like Figure 2 , Figure 3 As shown, the unit shielding structure 3 includes a unit shielding corrugated belt 31, which adopts a commonly used corrugated aluminum belt, and an annular unit shielding support ring 32 is supported on the inner wall surface of the unit shielding corrugated belt 31 at intervals. By adjusting the spacing distance between two adjacent unit shielding support rings 32, the pressure-bearing strength of the shielding structure can be changed to adapt to different use environments. The unit shielding support ring 32 is just embedded in the corrugated groove corresponding to the unit shielding corrugated belt 31, so that the unit shielding support ring 32 is relatively stably fixed on the inner wall surface of the unit shielding corrugated belt 31. The annular unit shielding support ring 32 is made of carbon fiber material, and has the characteristics of light weight and high strength. The unit shielding support ring 32 is composed of a unit upper support ring 33 and a unit lower support ring 34.

[0032] like Figure 4 , Figure 5 As shown, the upper support ring 33 of the unit is a semicircular ring made of carbon fiber material, and both ends of the semicircular ring are trapezoidal support ring tenons 35. Figure 6 , Figure 7 As shown, the unit lower support ring 34 is also a semicircular ring made of carbon fiber material, and a support ring groove 36 with a concave trapezoidal cross-section is provided at both ends of the semicircular ring. The cross-sectional shapes of the support ring tenon 35 and the support ring groove 36 are consistent with each other, so as to be plugged into each other to form a unit shielding support ring 32 with a full ring structure.

[0033] like Figure 8As shown, the inner sheath 6 is extruded from polyethylene material, and includes a sheath body 61 and a plurality of sheet-shaped support ribs 62 disposed on the inner wall of the sheath body 61 and spaced apart from each other. The sheath body 61 and the support ribs 62 thereon are extruded into an integral structure. The rib ends of the plurality of support ribs 62 disposed on the inner wall of the sheath body 61 are respectively located on four circumferential surfaces, and the diameter of each circumferential surface is correspondingly equal to the outer diameter of the unit shielding structure 3, so as to better accommodate and hold the corresponding unit shielding structure 3 and its twisted pair wire group 1. The support ribs 62 corresponding to each circumferential surface extend toward the circumferential surface along two mutually perpendicular radial directions, and the mutually perpendicular radial directions are parallel to the mutually perpendicular fins of the cross partition frame 4, thereby forming a stable holding effect on the twisted pair wire group.

[0034] like Fig. 9 As shown, the total shielding structure 7 includes a total shielding corrugated belt 71, which is made of commonly used corrugated aluminum belt. On the inner wall surface of the total shielding corrugated belt 71, annular total shielding support rings 72 are supported at intervals. By adjusting the spacing between two adjacent total shielding support rings 72, the pressure-bearing strength of the shielding structure can be changed to adapt to different use environments. The total shielding support ring 72 is embedded in the corrugated groove corresponding to the total shielding corrugated belt 71, so that the total shielding support ring 72 is relatively stably fixed on the inner wall surface of the total shielding corrugated belt 71. Fig.10 As shown, the annular total shielding support ring 72 is made of carbon fiber material, and has the characteristics of light weight and high strength. The total shielding support ring 72 is composed of an upper support ring 73 and a lower support ring 75.

[0035] like Fig.11 As shown, the upper support ring 73 is a semicircular ring made of carbon fiber material, and both ends of the semicircular ring are provided with a trapezoidal plug-in tenon 74. Fig.12 As shown, the lower support ring 75 is also a semicircular ring made of carbon fiber material, and both ends of the semicircular ring are provided with a concave trapezoidal cross-section plug-in groove 76. The cross-sectional shapes of the plug-in tenon 74 and the plug-in groove 76 are consistent, so as to be plugged into each other to form a total shielding support ring 72 of a full ring structure.

Claims

1. A digital communication optoelectronic composite cable, comprising a cable core and a cross partition frame (4) filled in the cable core, wherein four partition areas of the cross partition frame (4) are respectively provided with twisted wire groups (1); an optical fiber unit (5) is provided at the core position of the cross partition frame (4); the cable core is sequentially covered with an inner sheath (6), a general shielding structure (7) and an outer sheath (8) from the inside to the outside; characterized in that: The optical fiber unit (5) comprises a fiber core (51) and an optical fiber outer sheath (54); the fiber core (51) is surrounded by a cladding (52); a tensile filler (53) is filled between the cladding (52) and the optical fiber outer sheath (54); the tensile filler (53) is composed of aramid fiber yarn; Each pair of twisted wires (1) is coated with a unit shielding structure (3), the unit shielding structure (3) comprising a unit shielding corrugated belt (31) and unit shielding support rings (32) supported in the unit shielding corrugated belt (31) at intervals from each other, the unit shielding support rings (32) being embedded in corresponding corrugated grooves of the unit shielding corrugated belt (31), and the unit shielding support rings (32) being made of carbon fiber; The inner sheath (6) comprises a sheath body (61), a plurality of supporting ribs (62) are arranged on the inner wall surface of the sheath body (61), the rib ends of the supporting ribs (62) are respectively located on four circumferential surfaces, and the supporting ribs (62) are connected to the sheath body (61) as a whole; The overall shielding structure (7) comprises an overall shielding corrugated belt (71) and an overall shielding support ring (72) supported in the overall shielding corrugated belt (71) at intervals from each other, the overall shielding support ring (72) being embedded in the corrugated groove corresponding to the overall shielding corrugated belt (71), and the overall shielding support ring (72) is made of carbon fiber.

2. The digital communication optoelectronic composite cable according to claim 1, characterized in that: The optical fiber unit (5) has at least one fiber core (51), and each fiber core (51) is surrounded by a corresponding cladding (52).

3. The digital communication optoelectronic composite cable according to claim 1, characterized in that: The twisted pair wire group (1) is formed by twisting two insulated single wires (2), wherein the insulated single wire (2) comprises a conductor (21), and an insulating inner layer (22), an intermediate foam layer (23) and an insulating outer layer (24) are sequentially coated on the conductor (21).

4. The digital communication optoelectronic composite cable according to claim 1, characterized in that: The unit shielding corrugated tape (31) is a corrugated aluminum tape.

5. The digital communication optoelectronic composite cable according to claim 4, characterized in that: The unit shielding support ring (32) comprises a unit upper support ring (33) and a unit lower support ring (34), and the unit upper support ring (33) and the unit lower support ring (34) are mutually mortised by a support ring tenon (35) and a support ring groove (36).

6. The digital communication optoelectronic composite cable according to claim 1, characterized in that: The overall shielding corrugated strip (71) is a corrugated aluminum strip.

7. The digital communication optoelectronic composite cable according to claim 6, characterized in that: The total shielding support ring (72) comprises an upper support ring (73) and a lower support ring (75), and the upper support ring (73) and the lower support ring (75) are mutually mortised by means of a plug-in tenon (74) and a plug-in groove (76).

8. The digital communication optoelectronic composite cable according to claim 1, characterized in that: The supporting ribs (62) on the inner wall surface of the sheath body (61) are arranged at intervals from each other, and the diameter of the circumferential surface where the rib ends of the supporting ribs (62) are located is equal to the outer diameter of the unit shielding structure (3).

9. The digital communication optoelectronic composite cable according to claim 1 or 8, characterized in that: The supporting ribs (62) corresponding to the same circumferential surface extend toward the circumferential surface from a perpendicular direction.

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