CN105913960A - Photoelectric hybrid cable - Google Patents

Abstract

The invention discloses a photoelectric hybrid cable. The photoelectric hybrid cable includes at least 3 optical fiber cables and at least 6 power cables; A plastic armor tube with a hole-like channel, the optical fiber is arranged inside the hole-like channel of the plastic armor tube; the first wrapping layer surrounds the outside of the optical fiber cable and is tightly connected with the optical fiber cable; the power The cables are adjacent to the outside of the first wrapping layer; each of the power cables includes a plurality of conductors; the conductors are surrounded by an insulating layer; the second wrapping layer surrounds the power line The outer part of the cable is tightly connected with the power cable; in the area formed by two adjacent power cables and the second wrapping layer, extruded strips are arranged in contact with the above three. The photoelectric hybrid cable provided by the invention can simultaneously realize high-speed and safe transmission of electric power and information, is easy to lay, has low cost, and has a long service life.

Description

A kind of optical hybrid cable

technical field

The technical field of optical cables of the present invention, in particular, relates to a photoelectric hybrid cable capable of simultaneously transmitting optical signals and electrical signals.

Background technique

Optical hybrid cable is a new type of access method, which integrates optical fiber and transmission line, and can solve problems such as broadband access, equipment power consumption, and signal transmission.

With the rapid development of the national economy and society and the continuous improvement of people's living standards, the whole society has higher and higher requirements for safety, economy, and high-quality electricity consumption, and the pressure on the safe operation and management of power grids is increasing; at the same time, the needs of users The amount of information is increasing exponentially. The user's demand for exponentially increasing information cannot be met by traditional information transmission methods. Therefore, it is necessary to directly connect the optical cable to the interior of the building through a guide to greatly increase the flow of information. .

Due to the different characteristics of optical cables and cables, optical cables and cables are usually installed separately, so there is a large demand for the installation space of optical cables and cables; and because the installation is not synchronized, it will cause delays in installation work . The installation method in the prior art requires a large space, requires high installation materials and labor, has high costs, and is unfavorable for maintenance and repair.

In order to meet the needs of power transmission and information transmission at the same time, some technologies combine optical cables and electric cables to form hybrid cables. However, the existing optical-electrical hybrid cables generally have a relatively large outer diameter. In addition, since the optical fiber itself has the characteristics of thin diameter, soft quality, light weight, etc., the optical fiber is easily affected by external tension and impact force applied to the cable, resulting in poor information transmission.

Therefore, there is an urgent need for a technical solution that can ensure the safe operation of power transmission and at the same time ensure the high-speed transmission of large-capacity information in a high-voltage, strong electric field environment.

Contents of the invention

In order to solve the defects in the prior art, a hybrid cable that can be installed with optical fiber cables and power cables is provided, which can significantly reduce the outer diameter of the hybrid cable and effectively protect the optical fiber cables from external forces. damage.

According to one aspect of the present invention, an optical-electrical hybrid cable is provided, wherein the optical-electrical hybrid cable includes: at least 3 optical fiber cables and at least 6 power cables;

The optical fiber cables are set against each other; the optical fiber cables include a plastic armored tube with a plurality of hole-shaped channels, and the optical fibers are arranged inside the hole-shaped channels of the plastic armored tube;

The first wrapping layer surrounds the outside of the optical fiber cable and is tightly connected to the optical fiber cable;

The power cables are adjacently wrapped around the outside of the first wrapping layer; each of the power cables includes a plurality of conductors; the conductors are surrounded by an insulating layer;

The second wrapping layer surrounds the outside of the power cable and is closely connected with the power cable;

In the area formed by the two adjacent power cables and the second wrapping layer, extruded strips respectively contacting the above three are arranged.

According to a specific embodiment of the present invention, the optical-electrical hybrid cable further includes a temperature-measuring optical cable, and the temperature-measuring optical cable is placed in the cavity surrounded by the optical fiber cables.

According to another specific embodiment of the present invention, the temperature-measuring optical cable includes a plastic armored tube having a plurality of hole-shaped channels, and the temperature-measuring optical fiber is arranged inside the hole-shaped channels of the plastic armored tube.

According to yet another specific embodiment of the present invention, a fiber braided layer and a waterproof tape are sequentially wrapped on the outside of the plastic armor tube;

The fiber braided layer is braided by aramid fiber and glass fiber.

According to yet another specific embodiment of the present invention, the first wrapping layer is made of polyester, polyolefin, PVC and/or nylon.

According to yet another specific embodiment of the present invention, aramid fibers are filled between the first wrapping layer and the optical fiber cable.

According to yet another specific embodiment of the present invention, the conductor is formed by twisting a plurality of silver-plated copper wires with a diameter of 0.1 mm, and the lay distance is 16 mm to 17 mm.

According to yet another specific embodiment of the present invention, a metal braided layer, a glass fiber braided layer and an outer layer are sequentially arranged outside the insulating layer.

According to yet another specific embodiment of the present invention, a first filler is arranged in the center of the power cable, and the conductor is arranged around the first filler; the first filler is glass filament.

According to yet another specific embodiment of the present invention, the second wrapping layer includes, from inside to outside, an inner layer, a flame-retardant layer, an electrostatic shielding layer, a waterproof layer, a metal armor layer, a wear-resistant layer, and a sheath layer.

According to yet another specific embodiment of the present invention, the inner layer is mechanically braided with glass fibers and ceramic silica gel strips.

According to yet another specific embodiment of the present invention, the wear-resistant layer is made of a polymer with a friction coefficient between 0.15 and 0.25.

According to yet another specific embodiment of the present invention, a second filling body is disposed between the inner layer, the first wrapping layer, and the power cable; the second filling body is a high temperature resistant material.

According to yet another specific embodiment of the present invention, the extruded profile comprises: waterproof rope and/or flame-retardant polypropylene.

The photoelectric hybrid cable provided by the invention has the functions of power transmission and information transmission. By reasonably setting the position and layout of the power cable and the optical fiber cable, the efficient integration of the power cable and the optical fiber cable is realized, the outer diameter of the optical-electrical hybrid optical cable is effectively reduced, and the installation space is saved. The structure of the optical fiber cable and the power cable in the photoelectric hybrid cable provided by the present invention has a multi-layer structure, and its outer layer structure has its own characteristics. The inventors have made different designs on the structures of the optical fiber cables and the electric power cables through the research and experiments on the different characteristics of the optical fiber cables and the electric power cables. The technical solution provided by the invention strengthens the protection of the fragile and slender optical fiber from the influence of external force; it also improves the heat dissipation, waterproof, fastness and other performances of the power cable. The technical solution not only increases the overall service life of the photoelectric hybrid cable, but also saves labor and material costs.

In addition, during the power transmission process, the power transmission conductors in the power cables tend to generate a large amount of heat energy during operation, which may cause power line transmission failures. In order to solve the above problems, the photoelectric hybrid cable provided by the present invention also has a temperature measuring cable, which can remotely monitor the thermal effect of the cable carrying current in real time. The real-time temperature of the photoelectric hybrid optical cable can be effectively monitored through the temperature measuring cable, and an early warning can be given before an abnormality occurs; the fault point can also be found immediately after a fault occurs, shortening the maintenance time.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 is a schematic structural diagram of a specific embodiment of an optical-electrical hybrid cable provided according to the present invention;

FIG. 2 is a schematic structural diagram of a specific embodiment of an optical fiber cable in an optical-electrical hybrid cable provided according to the present invention;

Fig. 3 is a schematic structural diagram of a specific embodiment of a power cable in an optical-electrical hybrid cable provided according to the present invention;

Fig. 4 is a schematic structural diagram of a specific embodiment of a conductor in a power cable in an optical-electrical hybrid cable provided according to the present invention;

Fig. 5 is a schematic structural diagram of a specific embodiment of a second wrapping layer in an optical-electrical hybrid cable according to the present invention.

The reference numbers are as shown in the table below:

10 fiber optic cable 11 Plastic armor pipe 12 optical fiber 13 fiber braid 14 waterproof belt 15 Aramid fiber 20 power cable twenty one conductor twenty two Insulation twenty three metal braid twenty four fiberglass braid 25 first filler 26 second filler 27 outer layer 30 Temperature measurement cable 40 first wrapping layer 50 Second wrapping layer 51 inner layer 52 Flame retardant layer 53 electrostatic shielding layer 54 Waterproof layer 55 metal armor layer 56 wear layer 57 Sheath layer 58 extruded profile

The same or similar reference numerals in the drawings represent the same or similar components.

detailed description

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the present invention.

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of a specific embodiment of an optical-electrical hybrid cable according to the present invention. The optical-electrical hybrid cable includes: at least 3 optical fiber cables 10 and at least 6 power cables 20 .

The optical fiber cables 10 are arranged in pairs. The optical fiber cable 10 includes a plastic armor tube 11 with a plurality of hole-shaped channels, and the optical fiber 12 is arranged inside the hole-shaped channels of the plastic armor tube 11 , as shown in FIG. 2 . Since the optical fiber 12 itself is thin, fragile, and easy to break, it needs special protection. The present invention adopts the plastic armor tube 11 with a hole-shaped channel to protect the optical fiber 12, which can protect the optical fiber from being damaged by external force, thereby ensuring the smooth transmission of information.

In addition, preferably, the optical-electrical hybrid cable further includes a temperature-measuring optical cable 30 , and the temperature-measuring optical cable 30 is placed in the cavity surrounded by the optical fiber cables 10 . The setting of the temperature measuring optical cable 30 is conducive to real-time monitoring of the temperature of the optical-electrical hybrid cable, and helps to ensure that the optical-electrical hybrid cable works normally within a reasonable temperature range. In the same way, since the temperature-measuring optical cable 30 is composed of temperature-measuring optical fibers, it is preferred that the temperature-measuring optical cable 30 also includes a plastic armored tube with a plurality of hole-like passages, and the temperature-measuring optical fiber is arranged in the holes of the plastic armored tube inside the channel.

Optionally, the plastic armor pipe 11 can be selected such as polyvinyl chloride (PVC), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), thermoplastic polyester (PBT ), optical fiber plastic tube and polyurethane (PU) and other materials. Preferably, the plastic armor tube 11 is made of a low-smoke zero-halogen (LSZH) material, which not only can effectively protect the optical fiber 12 from external damage, but also has flame-retardant properties.

A fiber braided layer 13 and a waterproof tape 14 are sequentially wrapped on the outside of the plastic armor tube 11 . Wherein, preferably, the fiber braided layer 13 is braided by aramid fiber and glass fiber. Aramid fiber (poly-p-phenylene terephthalamide) has excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, and light weight; especially its toughness is twice that of steel wire . Glass fiber has the characteristics of good insulation, strong heat resistance, and high mechanical strength; but the disadvantage is that it is brittle and has poor wear resistance. Therefore, the fiber braided layer 13 formed by combining aramid fibers and glass fibers not only has the advantages of the above two, but also avoids the defects of the two, has good insulation and anti-aging properties, and has a long life. cycle.

Preferably, the waterproof tape 14 is a double-sided aluminum-plastic composite tape and a longitudinal wrapping structure made of extruded polyethylene, which can effectively protect the optical fiber 12 from moisture and ensure the normal operation of the optical fiber 12 . Since the entire optical-electrical hybrid optical cable has a multi-layer protection mechanism, the thickness of the waterproof tape 14 does not need to be too thick, so that the optical fiber 12 can be protected to a certain extent, and the outer diameter of the optical-electrical hybrid cable will not be increased too much. Preferably, the thickness of the waterproof tape 14 is 0.1mm~0.15mm.

The first wrapping layer 40 surrounds the optical fiber cable 10 and is closely connected with the optical fiber cable 10 . Aramid fibers 15 are filled between the first wrapping layer 40 , the optical fiber cable 10 and the temperature measuring optical cable 30 . As a high polymer, aramid fiber itself has good mechanical properties; and excellent heat resistance, wear resistance, chemical resistance and self-lubricating properties; at the same time, its coefficient of friction is low, and it has certain flame retardant. In addition, because it is easy to process, it can be used as a filler to protect the optical fiber cable 10 and the temperature measurement optical cable 30, and can further reduce the production cost of the entire optical-electrical hybrid cable.

Preferably, the first wrapping layer 40 is made of polyester, polyolefin, PVC and/or nylon.

The power cable 20 is adjacently wrapped around the outside of the first wrapping layer 40 . As shown in FIGS. 3 and 4 , each of the power cables 20 includes a plurality of conductors 21 . Preferably, the conductor 21 is formed by twisting a plurality of silver-plated copper wires with a diameter of 0.1mm, and the lay length is 16mm-17mm, for example: 16mm, 16.5mm or 17mm. To achieve electrical isolation, the conductor 21 is surrounded by an insulating layer 22 . Optionally, the insulating layer 22 may be made of polyvinyl chloride. Preferably, the insulating layer 22 is made of polyperfluoroethylene. FEP has excellent insulation, good wear resistance, and is not affected by external influences such as working environment temperature, humidity, frequency, etc., and has good arc resistance; especially high and low temperature resistance, it can be used at -250°C~200°C It can be used stably for a long time in the temperature range of ℃.

Preferably, a metal braided layer 23 , a glass fiber braided layer 24 and an outer layer 27 are sequentially arranged outside the insulating layer 22 . Wherein, the metal braiding layer 23 can be made of one or more metals of copper, lead, steel or aluminum to further protect the conductor 21 . The glass fiber braided layer 24 can play the role of further insulation, heat resistance and corrosion resistance. The outer layer 27 can be made of rubber or plastic, so as to further protect the conductor 21, and also play a role of insulation and enhanced durability. Preferably, the outer layer 27 is made of polyperfluoroethylene.

Preferably, a first filling body 25 is disposed at the center of the power cable 20 , and the conductor 21 is disposed around the first filling body 25 . Wherein, the first filling body 25 is made of glass fiber material. The glass filament has high strength and low cost, and if it is placed in the center of the power cable 20, it can support the conductor 21 around it, and the conductor 21 will be deformed and damaged after being subjected to external force, causing accidents.

The second wrapping layer 50 surrounds the power cable 20 and is closely connected with the power cable 20 . Preferably, in the area formed by two adjacent power cables 20 and the second wrapping layer 50 , extruded strips 58 respectively contacting the above three are provided. The setting of the extruded profile 58 can further help the power cable 20 resist external force, keep the position and shape of the power cable 20 from changing under external force, and increase the service life of the photoelectric hybrid cable. In addition, through different material selections, the extruded strip 58 can also play other functions, such as: waterproof, flame retardant and so on. Preferably, the material of the extruded strip 58 includes but not limited to: waterproof rope and/or flame-retardant polypropylene. It is worth noting that although the shape of the extruded strip 58 is not specifically limited, it can be circular, oval, triangular, trapezoidal, etc.; however, it is preferable to adopt an oval shape, which can not only better resist external forces, but also reduce its own Possible damage from contact with the power cable 20.

As shown in Figure 5, the second wrapping layer 50 includes from the inside to the outside: an inner layer 51, a flame-retardant layer 52, an electrostatic shielding layer 53, a waterproof layer 54, a metal armor layer 55, a wear-resistant layer 56 and a protective layer. Jacket 57.

Wherein, the inner layer 51 is mechanically braided by glass fiber and ceramic silica gel strips. The inner layer 51 woven by the above two materials is soft at room temperature, shock-absorbing and impact-resistant, and has good thermal insulation of the shell; when the temperature is above 550 degrees, it forms a hard shell, which does not fall off after sintering, and the formed ceramic body is not shrink. No matter in daily use or after an accident, it can provide effective protection for the power cable 20 .

Preferably, the flame retardant layer 52 is made of polyvinyl chloride material. Polyvinyl chloride material has good insulation performance, high reliability and good flame retardancy. In the event of a fire accident, the flame-retardant layer 52 formed of polyvinyl chloride can form a heat-insulating and oxygen-resistant carbonized layer to protect the power cable 20 and prevent the flame from continuing to burn.

The arrangement of the electrostatic shielding layer 53 can avoid the influence of the external electric field on the power cable 20 , and can also avoid the influence of the electric field generated by the power cable 20 on the outside. Preferably, the electrostatic shielding layer 53 can be a paint layer painted with paint; it can also be a metal braided cover layer made of wire weaving.

The setting of the waterproof layer 54 can not only protect the power cable 20 from damage when there is leakage of external water source, but also prevent the power cable 20 from being corroded by water vapor in the air. Preferably, the waterproof layer 54 is a longitudinal wrapping structure made of double-sided aluminum-plastic composite tape and extruded polyethylene.

The metal armor layer 55 is preferably made of copper, aluminum and other metals, especially aluminum is light in weight and is a very good optional material for the metal armor layer 55 .

The wear-resistant layer 56 is made of a polymer with a friction coefficient between 0.15 and 0.25. The arrangement of the wear-resistant layer 56 can effectively limit the external force acting on the sheath layer 57, such as bending force. In addition, since the polymer itself has waterproof properties, the wear-resistant layer 56 can further play a waterproof role.

The sheath layer 57 is made of materials such as polyvinyl chloride and polyethylene.

Preferably, a second filling body 26 is disposed between the inner layer 51 , the first wrapping layer 40 and the power cable 20 . Wherein, the second filling body 26 is a high temperature resistant material. Preferably, the high temperature resistant material is ceramic and/or silicon carbide material.

It is worth noting that due to the wide variety of polymers and the subtle differences between some materials, the various materials selected in the present invention are determined after repeated research and testing by the inventor, and cannot be replaced or changed at will. .

The photoelectric hybrid cable provided by the invention can realize high-speed and safe transmission of electric power and information at the same time; the structure layout is reasonable; the installation is easy; the cost is low; and the service life is long.

Although the example embodiments and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made to these embodiments without departing from the spirit of the invention and the scope of protection as defined by the appended claims. For other examples, those of ordinary skill in the art will readily understand that the order of process steps may be varied while remaining within the scope of the present invention.

In addition, the scope of application of the present invention is not limited to the process, mechanism, manufacture, material composition, means, method and steps of the specific embodiments described in the specification. From the disclosure of the present invention, those of ordinary skill in the art will easily understand that for the processes, mechanisms, manufacturing, material compositions, means, methods or steps that currently exist or will be developed in the future, they are implemented in accordance with the present invention Corresponding embodiments described which function substantially the same or achieve substantially the same results may be applied in accordance with the present invention. Therefore, the appended claims of the present invention are intended to include these processes, mechanisms, manufacture, material compositions, means, methods or steps within their protection scope.

Claims (14)

1. A photoelectric hybrid cable, characterized in that, the photoelectric hybrid cable comprises: at least 3 optical fiber cables and at least 6 power cables; The optical fiber cables are set against each other; the optical fiber cables include a plastic armored tube with a plurality of hole-shaped channels, and the optical fibers are arranged inside the hole-shaped channels of the plastic armored tube; The first wrapping layer surrounds the outside of the optical fiber cable and is tightly connected to the optical fiber cable; The power cables are adjacently wrapped around the outside of the first wrapping layer; each of the power cables includes a plurality of conductors; the conductors are surrounded by an insulating layer; The second wrapping layer surrounds the outside of the power cable and is closely connected with the power cable; In the area formed by the two adjacent power cables and the second wrapping layer, extruded strips respectively contacting the above three are arranged. 2. The optical-electrical hybrid cable according to claim 1, characterized in that, the optical-electrical hybrid cable further comprises a temperature-measuring optical cable, and the temperature-measuring optical cable is placed in the cavity surrounded by the optical fiber cables . 3. The photoelectric hybrid cable according to claim 2, wherein the temperature-measuring optical cable comprises a plastic armored tube with a plurality of hole-shaped channels, and the temperature-measuring optical fiber is arranged inside the hole-shaped channels of the plastic armored tube . 4. The photoelectric hybrid cable according to claim 1 or 3, characterized in that a fiber braid and a waterproof tape are sequentially wrapped on the outside of the plastic armor tube; The fiber braided layer is braided by aramid fiber and glass fiber. 5. The optical-electrical hybrid cable according to claim 1, wherein the first wrapping layer is made of polyester, polyolefin, PVC and/or nylon. 6. The optical-electrical hybrid cable according to claim 1, characterized in that, aramid fiber is filled between the first wrapping layer and the optical fiber cable. 7 . The photoelectric hybrid cable according to claim 1 , wherein the conductor is twisted by a plurality of silver-plated copper wires with a diameter of 0.1 mm, and the twist distance is 16 mm to 17 mm. 8 . The optical-electrical hybrid cable according to claim 1 , wherein a metal braiding layer, a glass fiber braiding layer and an outer layer are sequentially arranged outside the insulating layer. 9. The optical-electrical hybrid cable according to claim 1, wherein a first filling body is arranged in the center of the power cable, and the conductor is arranged around the first filling body; the first filling body is glass wool. 10. The optical-electrical hybrid cable according to claim 1, wherein the second wrapping layer sequentially comprises from the inside to the outside: an inner layer, a flame-retardant layer, an electrostatic shielding layer, a waterproof layer, a metal armor layer, Wear-resistant layer, sheath layer. 11. The optical-electrical hybrid cable according to claim 10, wherein the inner layer is mechanically braided by glass fiber and ceramic silicone strips. 12. The optical-electrical hybrid cable according to claim 10, wherein the wear-resistant layer is made of a polymer with a friction coefficient between 0.15 and 0.25. 13. The optical-electrical hybrid cable according to claim 1, characterized in that, a second filler is arranged between the inner layer, the first wrapping layer and the power cable; the second filler The body is a high temperature resistant material. 14. The optical-electrical hybrid cable according to claim 1, wherein the extruded profile comprises: waterproof rope and/or flame-retardant polypropylene.