CN215769136U - Communication optical cable with excellent water resistance - Google Patents

Abstract

The invention provides a communication optical cable with excellent water resistance, which comprises a cable core and a sheath structure outside the cable core; the cable core comprises a central reinforcing support and a plurality of optical communication units arranged on the periphery of the central reinforcing support, each optical communication unit comprises a sleeve, a plurality of optical fibers in the sleeve and a plurality of inner water blocking members, the outer side of each optical fiber is coated with an inner water blocking layer, and the outer side of each sleeve is coated with a first water blocking layer; the sheath structure comprises a PET tape winding layer, a fourth water-resistant layer, a comprehensive sheath, a fifth water-resistant layer, an armor layer, an outer water-resistant layer and an outer sheath which are sequentially coated from inside to outside. The invention has the advantages of reasonable structural design, light weight of the optical cable, convenient construction and maintenance, excellent temperature resistance, moisture resistance, pressure resistance, friction resistance, animal tooth bite resistance and the like, and high safety and reliability.

Description

Communication optical cable with excellent water resistance

Technical Field

The invention belongs to the technical field of communication facilities, and particularly relates to a communication optical cable with excellent water blocking performance.

Background

With the development of communication technology, the application of optical cables is gradually widespread, and the water resistance is an important index of the optical cables in the design and manufacturing process of the optical cables. Once water or moisture invades the inside of the optical cable, not only can the metal element be corroded, but also the water peak attenuation of the optical fiber can be caused, the loss of the optical fiber is increased, and the transmission performance of the optical fiber is seriously influenced. Therefore, technical innovation needs to be performed on the existing communication optical cable, the structural design of the common optical cable is improved, and the waterproof performance is improved.

Disclosure of Invention

In view of the above, the present invention provides a communication optical cable with excellent water-blocking performance, which aims to overcome the defects in the prior art.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a communication optical cable with excellent water resistance performance comprises a cable core and a sheath structure outside the cable core; the cable core comprises a central reinforcing support and a plurality of optical communication units arranged on the periphery of the central reinforcing support, each optical communication unit comprises a sleeve, a plurality of optical fibers in the sleeve and a plurality of inner water blocking members, the outer side of each optical fiber is coated with an inner water blocking layer, and the outer side of each sleeve is coated with a first water blocking layer; the cable core is characterized in that a second water-resistant layer, a third water-resistant layer and an inner sheath are sequentially coated on the outer side of the cable core, and the sheath structure comprises a PET tape winding layer, a fourth water-resistant layer, a comprehensive sheath, a fifth water-resistant layer, an armor layer, an outer water-resistant layer and an outer sheath which are sequentially coated from inside to outside.

Further, the inner side of the second waterproof layer is filled with an outer waterproof piece.

Further, the inner water blocking layer adopts a waterproof coating layer.

Furthermore, the first water-resistant layer, the second water-resistant layer and the fourth water-resistant layer adopt water-resistant yarn layers.

Further, the third water-resistant layer and the fifth water-resistant layer adopt water-resistant tape wrapping layers.

Furthermore, the armor layer adopts a corrugated pipe copper strip armor layer.

Further, the sleeve adopts a PBT loose sleeve.

Compared with the prior art, the invention has the following advantages:

the invention has the advantages of reasonable structural design, light weight of the optical cable and convenient construction and maintenance. The water-blocking glass fiber woven belts outside the stranded optical communication units and the water-blocking glass fiber woven belts outside the comprehensive protective layers play a role in double protection around the covering and have good water-blocking and tensile properties, so that the optical cable has excellent transverse water-blocking and longitudinal water-blocking functions, has excellent temperature-resistant, moisture-proof, pressure-resistant, friction-resistant, animal bite-resistant and other functions, and is high in safety and reliability. The armor adopts bellows copper strips armor, and the armor has the ripple structure, and structural strength is high, non-deformable, and the optical cable has higher tensile strength and bending property.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:

FIG. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic diagram of a portion of an optical communication unit in an embodiment of the present invention;

fig. 3 is a schematic view of the inventive central reinforcing brace with an inner support.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.

A communication optical cable with excellent water-blocking performance is shown in figures 1 and 2 and comprises a cable core and a sheath structure outside the cable core; the cable core is including central strengthening support piece 1 and central strengthening support piece peripheral a plurality of optical communication unit 2 of arranging, optical communication unit includes sleeve pipe 3 and intraductal several optic fibre 4 of sleeve and a plurality of interior water blocking spare 5, and every optic fibre outside all wraps has interior water blocking layer 6, the sleeve pipe outside wraps has first water blocking layer 7, and above-mentioned sleeve pipe adopts the PBT loose tube.

The outer side of the cable core is sequentially coated with a second water-resistant layer 8, a third water-resistant layer 9 and an inner sheath 10, and the sheath structure comprises a PET tape winding layer 11, a fourth water-resistant layer 12, a comprehensive sheath 13, a fifth water-resistant layer 14, an armor layer 15, an outer water-resistant layer 16 and an outer sheath 17 which are sequentially coated from inside to outside.

The inner side of the second water-blocking layer (between the optical communication units and the central reinforcing support) is filled with an outer water-blocking member 18, the inner water-blocking member and the outer water-blocking member can be of strip-shaped or rope-shaped structures and can be made of water-blocking yarns, and particularly, the inner water-blocking member and the outer water-blocking member are filled in gaps between the optical fibers and the loose tubes in a filling mode. The second water-blocking layer is coated outside the cable core in a spiral winding mode, so that the cable core is guaranteed to be compact and not to be loose, and the integrity is good.

The inner water-blocking layer adopts a waterproof coating layer, and the waterproof coating is arranged on the surface of the optical fiber, so that when water flows to the surface of the coating, the water can slide off due to the hydrophobic effect of the coating, and the surface of the optical fiber is not subjected to water retention, thereby achieving the purpose of water blocking.

The first water-resistant layer, the second water-resistant layer and the fourth water-resistant layer adopt water-resistant yarn layers. The adopted water-blocking yarns are prepared by a process of vertically drying water-soluble high-molecular compounds such as sodium polyacrylate water-absorbent resin, and super water-absorbent polymer substances are uniformly coated around each yarn, so that the obtained water-blocking yarns are soft and super water-absorbent, and therefore, the water-blocking yarns can provide very uniform protection for water migration and can replace the traditional water-blocking factice as a water-blocking material, the buffering of the factice is avoided, the weight of the optical cable is reduced, and meanwhile, the construction and the maintenance are convenient.

The third water-blocking layer and the fifth water-blocking layer are wrapped by water-blocking tapes, for example, water-blocking woven glass fiber tapes are wrapped by water-blocking woven glass fiber tapes, and the water-blocking woven glass fiber tapes are longitudinally wrapped during manufacturing. It should be pointed out that, the water-blocking glass fiber braided belt is usually a center reinforcing support process of coating water-soluble high molecular compounds such as sodium polyacrylate water-absorbing resin by adopting a vertical drying technology, each glass fiber is uniformly coated with super water-absorbing polymeric substances, the obtained glass fiber strand is soft and tough, the glass fiber braided belt is formed and coated at one time by adopting a longitudinal coating process, and the processing equipment and the process are simple, so that the water-blocking glass fiber braided belt has good water blocking performance and tensile tension, and is soft and flexible.

The armor layer adopts a corrugated pipe copper strip armor layer. The copper strips quantity is little, and production efficiency is high, low in manufacturing cost, and the armor has the ripple structure, and structural strength is high, non-deformable, and the optical cable has higher tensile strength and bending property.

In an alternative embodiment, as shown in fig. 3, the central reinforcing support includes a central body 18 and a peripheral inner support 19, the central reinforcing support is made of rubber material, and the central body and the peripheral inner support are integrally formed, so that the integrity is better, the optical cable has better compression resistance and bending resistance, and is not easily damaged.

When the optical cable is manufactured specifically, the cable core part is tightly wrapped by the second water-blocking layer and the third water-blocking layer, and certain pre-pressure is generated on the cable core part, so that the central reinforcing support piece has a better supporting effect on the optical communication unit, the optical communication unit is ensured to be positioned in a concave part between two inner side support bodies in a normal state, the structural stability is better, when the optical cable is subjected to extrusion and bending acting forces, the central reinforcing support piece supports each optical communication unit, when the optical cable is subjected to a larger load, the inner side support body part is allowed to deform to a certain extent, and the optical communication unit has small offset in the radial direction, so that the optical communication unit can be effectively protected.

And coating a layer of waterproof coating on the surface of the optical fiber by adopting a coating process, and arranging a plurality of optical fibers and water-blocking yarns in the PBT sleeve by adopting a plastic sheathing and filling process to finish the manufacture of the optical communication unit. Then, stranding a plurality of manufactured optical communication units and water-blocking yarns by adopting a cabling and filling process, fixing the water-blocking yarns outside the stranded optical communication units in a spiral winding manner, longitudinally wrapping and extruding a woven water-blocking glass fiber tape outside the spirally wound and fixed water-blocking yarns in a longitudinal wrapping manner by adopting a longitudinal wrapping process, and extruding a protective cover layer outside the longitudinally wrapped and formed water-blocking glass fiber tape to complete the manufacture of the cable core.

And finally, coating an outer protective layer structure, namely coating the PET belt and the water blocking belt outside the cable core by adopting a wrapping process, preparing a comprehensive protective layer by adopting a longitudinal wrapping process and an extrusion molding process, sequentially coating a fifth water blocking layer, an armor layer and an outer water blocking layer outside the comprehensive protective layer, and finally extruding an outer sheath to form the communication optical cable with excellent water blocking performance.

The invention has reasonable structure design, light optical cable weight and convenient construction and maintenance, and water-blocking yarns are filled between the optical fibers in the optical communication units and between the twisted optical communication units, thereby not only providing uniform protection for water migration, but also replacing the traditional water-blocking factice as a water-blocking material, avoiding the buffering of the factice and reducing the weight of the cable. The water-blocking glass fiber woven belts outside the stranded optical communication units and the water-blocking glass fiber woven belts outside the comprehensive protective layers play a role in double protection around the covering and have good water-blocking and tensile properties, so that the optical cable has excellent transverse water-blocking and longitudinal water-blocking functions, has excellent temperature-resistant, moisture-proof, pressure-resistant, friction-resistant, animal bite-resistant and other functions, and is high in safety and reliability.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.

Claims (7)

1. A communication optical cable with excellent water blocking performance is characterized in that: the cable comprises a cable core and a sheath structure outside the cable core; the cable core comprises a central reinforcing support and a plurality of optical communication units arranged on the periphery of the central reinforcing support, each optical communication unit comprises a sleeve, a plurality of optical fibers in the sleeve and a plurality of inner water blocking members, the outer side of each optical fiber is coated with an inner water blocking layer, and the outer side of each sleeve is coated with a first water blocking layer; the cable core is characterized in that a second water-resistant layer, a third water-resistant layer and an inner sheath are sequentially coated on the outer side of the cable core, and the sheath structure comprises a PET tape winding layer, a fourth water-resistant layer, a comprehensive sheath, a fifth water-resistant layer, an armor layer, an outer water-resistant layer and an outer sheath which are sequentially coated from inside to outside.

2. The optical communication cable with excellent water blocking performance according to claim 1, wherein: and the inner side of the second water-resistant layer is filled with an outer water-resistant piece.

3. The optical communication cable with excellent water blocking performance according to claim 1, wherein: the inner water blocking layer adopts a waterproof coating layer.

4. The optical communication cable with excellent water blocking performance according to claim 1, wherein: the first water-resistant layer, the second water-resistant layer and the fourth water-resistant layer adopt water-resistant yarn layers.

5. The optical communication cable with excellent water blocking performance according to claim 1, wherein: and the third water-resistant layer and the fifth water-resistant layer adopt water-resistant tape wrapping layers.

6. The optical communication cable with excellent water blocking performance according to claim 1, wherein: the armor layer is a corrugated pipe copper strip armor layer.

7. The optical communication cable with excellent water blocking performance according to claim 1, wherein: the sleeve is a PBT loose sleeve.

Images