A photoelectric hybrid cable with high tensile strength and water seepage monitoring

Abstract

The present invention discloses an optoelectronic hybrid cable with high tensile strength and capable of monitoring water seepage, comprising an outer sheath, a water-absorbing resin layer, a wrapping layer and a cable core arranged from outside to inside; a central reinforcement member is arranged at the center of the cable core, and the central reinforcement member is made of a thermoplastic resin and glass fiber mixed material, and the cable core also includes a filling rope and a plurality of optical fiber cables arranged around the central reinforcement member; the wrapping layer is formed by wrapping a resin glass fiber mixed tape on the cable core; the water-absorbing resin layer is wrapped on the wrapping layer, and a sensing optical fiber is arranged in the water-absorbing resin layer; the outer sheath is wrapped outside the water-absorbing resin layer, and a plurality of copper wires are arranged inside the outer sheath. The optoelectronic hybrid cable not only has good tensile strength and lateral pressure resistance, but also can monitor water seepage and send out a water seepage alarm signal, and can also realize dual transmission of optical signals and electrical signals.

Description

Technical Field

[0001] The invention belongs to the technical field of communications, and in particular relates to an optoelectronic hybrid cable which has high tensile strength and can monitor water seepage. Background Art

[0002] In the prior art, when laying optical cables, it is necessary to stretch the optical cables, so the optical cables need to have good tensile properties. The current optical cable products that can provide tensile force include central reinforcements (metal reinforcements and non-metal reinforcements), glass fiber yarns, aramid yarns, etc.; among them, the central reinforcement can provide the main source of tensile force. When a single central reinforcement cannot meet the tensile force, a combination of multiple layers of reinforcements is required to achieve the required tensile force; however, this method of setting up multiple layers of reinforcements not only increases the cost, but also increases the size and weight of the optical cable, which increases the risk of long-term stretching and damage to overhead optical cables.

[0003] In addition, if a water seepage accident occurs in the laid optical cables and the staff cannot monitor it, it will easily affect the optical fiber transmission performance and cause it to fail to work normally.

[0004] Furthermore, existing optical cables can only transmit optical signals but not electrical signals, which cannot meet the usage requirements. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide an optoelectronic hybrid cable with high tensile strength and capable of monitoring water seepage. It not only has good tensile strength and lateral pressure resistance, but also can monitor water seepage and send out a water seepage alarm signal, while realizing dual transmission of optical signals and electrical signals.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] A photoelectric hybrid cable with high tensile strength and capable of monitoring water seepage, comprising an outer sheath, a water-absorbing resin layer, a cladding layer and a cable core arranged from the outside to the inside; a central reinforcement member is arranged at the center of the cable core, and the central reinforcement member is made of a thermoplastic resin and glass fiber mixed material, and the cable core also includes a filling rope and a plurality of optical fiber cables arranged around the central reinforcement member; the cladding layer is formed by wrapping a resin and glass fiber mixed tape around the cable core; the water-absorbing resin layer is wrapped on the cladding layer, and a sensing optical fiber is arranged in the water-absorbing resin layer; the outer sheath is wrapped outside the water-absorbing resin layer, and a plurality of copper wires are arranged inside the outer sheath.

[0008] Furthermore, the optical fiber cable of the cable core is composed of a loose tube, a plurality of optical fiber inner cores, and a fiber paste filled between the optical fiber inner cores and the loose tube.

[0009] Furthermore, the cable core is filled with filling grease.

[0010] Furthermore, the copper wire is coated with ceramic high-temperature insulating varnish.

[0011] Furthermore, the ceramic high temperature insulating varnish is made of inorganic-organic grafted modified resin, nano-scale mica and silicon nitride.

[0012] Furthermore, the central reinforcement is formed by twisting together a plurality of reinforcement single ropes made of a mixed material of thermoplastic resin and glass fiber.

[0013] Furthermore, the sensing optical fiber is arranged in a spiral forward manner in the water-absorbing resin layer.

[0014] The beneficial effects of the present invention are:

[0015] (1) The central reinforcement member of the present invention is made of a thermoplastic resin and glass fiber mixed material, and is formed by twisting multiple reinforcement single ropes; this central reinforcement member replaces the traditional reinforcement member, which not only makes the entire optical-electric hybrid cable lighter in weight, but also has stronger tensile strength than traditional metal reinforcement members, and its tensile strength can reach 3000N / mm 2 , thus preventing the optical fiber from being damaged during the construction process and affecting the optical fiber attenuation performance; in addition, the cable core is wrapped with a resin glass fiber hybrid tape, which can further enhance the tensile capacity of the optoelectronic hybrid cable and make it more resistant to lateral pressure compared to the traditional steel-aluminum tape.

[0016] (2) The optical-electric hybrid cable is provided with a water-absorbing resin layer; the highly water-absorbing resin in the water-absorbing resin layer is a functional polymer material with a large number of hydrophilic groups. It has a high water-absorbing function of absorbing water that is several hundred to several thousand times heavier than itself, and has excellent water-retaining performance. Once it absorbs water and swells into a hydrogel, it is difficult to separate the water even under pressure; when a water seepage accident occurs in the laid optical cable, the water-absorbing resin layer takes effect and absorbs the water to avoid affecting the optical fiber transmission performance;

[0017] (3) The optical-electric hybrid cable of the present invention adds a sensing optical fiber in the middle of the water-absorbing resin layer to monitor the moisture, humidity, etc. in the water-absorbing resin; the sensing optical fiber is arranged in a spiral forward manner in the water-absorbing resin to ensure that each cable surface can be monitored when there is water seepage. When the moisture and humidity in the water-absorbing resin layer change, the sensing optical fiber outputs a signal, and the connector installed at the terminal receives the signal and transmits the alarm signal to the command center at the same time, so that personnel can be arranged to inspect and maintain the alarm point to prevent further water seepage in the optical cable;

[0018] (4) A copper conductor is arranged in the outer sheath, so that the optoelectronic hybrid cable can transmit electrical signals, while the internal cable core can realize the function of transmitting optical signals; in addition, the surface of the copper conductor in the outer sheath is coated with ceramic high-temperature insulating paint, which improves the high-temperature resistance of the copper conductor and can withstand a high temperature of 1700°C. Furthermore, the ceramic high-temperature insulating paint has good adhesion, which can prevent the insulating shielding current from passing through at high temperatures and prevent the occurrence of corona discharge; and the insulating paint coating is dense, has high resistivity, and has a good dielectric constant, and will not produce electron percolation and tunneling effects. At the same time, it has high hardness and good wear resistance, which improves the service life of the copper conductor. Furthermore, the copper conductor can power the relevant modulation and demodulation equipment of the sensor optical fiber, without the need for external wiring power supply, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The schematic diagram of the structure of the optoelectronic hybrid cable of the present invention has high tensile strength and can monitor water seepage. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0021] like Figure 1 A preferred embodiment of an optoelectronic hybrid cable with high tensile strength and capable of monitoring water seepage is shown, the optoelectronic hybrid cable comprises an outer sheath 1, a water-absorbing resin layer 2, a cladding layer 3 and a cable core arranged from the outside to the inside; a central reinforcement member 4 is provided at the center of the cable core, the central reinforcement member 4 is made of a mixed material of thermoplastic resin and glass fiber, the cable core also comprises a filling rope 5 and a plurality of optical fiber cables 6 arranged around the central reinforcement member 4; in this embodiment, the number of optical fiber cables 6 is 4, and the number of filling ropes 5 is 2; the cladding layer 3 is formed by wrapping a resin-glass fiber mixed tape around the cable core; the water-absorbing resin layer 2 is wrapped on the cladding layer 3, and a sensing optical fiber 7 is provided in the water-absorbing resin layer 2; the outer sheath 1 is wrapped outside the water-absorbing resin layer 2, and a plurality of copper wires 8 are provided inside the outer sheath 1; in this embodiment, the number of copper wires is 4.

[0022] Specifically, the optical fiber cable 6 of the cable core is composed of a loose tube 61, multiple optical fiber cores 62 and a fiber paste 63 filled between the optical fiber core 62 and the loose tube 61. In this embodiment, the number of the optical fiber cores in each optical fiber cable is 4. In addition, between multiple optical fiber cables of the cable core, between the optical fiber cable and the filling rope, and between the optical fiber cable, the filling rope and the intermediate strength member, filling paste 9 is filled.

[0023] Furthermore, the copper conductor 8 is coated with a ceramic high temperature insulating varnish; the ceramic high temperature insulating varnish is made by using an inorganic-organic grafted modified resin as a film-forming substance, and then adding flaky nano-scale mica and silicon nitride as fillers.

[0024] In order to further enhance the tensile strength and lateral pressure resistance of the entire optoelectronic hybrid cable, the central reinforcement member 4 is formed by twisting together a plurality of reinforcement single ropes made of a thermoplastic resin and glass fiber mixed material.

[0025] Furthermore, the sensing optical fiber 7 is arranged in a spiral forward manner in the water-absorbing resin layer 2, so as to ensure that each cable surface can be monitored in place when there is water seepage.

[0026] The central reinforcement member 4 in the optical-electric hybrid cable is made of a thermoplastic resin and glass fiber mixed material, and is formed by twisting multiple reinforcement single ropes; this central reinforcement member replaces the traditional reinforcement member, which not only makes the entire optical-electric hybrid cable lighter in weight, but also has stronger tensile resistance than traditional metal reinforcement members, and its tensile resistance can reach 3000N / mm 2 , thus preventing the optical fiber from being damaged during the construction process and affecting the optical fiber attenuation performance; in addition, the cable core is wrapped with a resin glass fiber hybrid tape, which can further enhance the tensile capacity of the optoelectronic hybrid cable and make it more resistant to lateral pressure compared to the traditional steel-aluminum tape.

[0027] The core of the optical-electric hybrid cable is wrapped with a water-absorbing resin layer 2; the highly water-absorbing resin in the water-absorbing resin layer is a functional polymer material with a large number of hydrophilic groups, which has a high water-absorbing function of absorbing water hundreds to thousands of times heavier than itself, and has excellent water-retaining performance. Once it absorbs water and swells to become a hydrogel, it is difficult to separate the water even under pressure; when the laid optical cable has a water seepage accident, the water-absorbing resin layer plays a role and absorbs the water to avoid affecting the optical fiber transmission performance;

[0028] The optoelectronic hybrid cable adds a sensing optical fiber 7 in the middle of the water-absorbing resin layer 2 to monitor the moisture and humidity in the water-absorbing resin. The sensing optical fiber is arranged in a spiral forward manner in the water-absorbing resin to ensure that each cable surface can be monitored when there is water seepage. When the moisture and humidity in the water-absorbing resin layer change, the sensing optical fiber outputs a signal, and the connector installed at the terminal receives the signal and transmits the alarm signal to the command center, so that personnel can be arranged to inspect and maintain the alarm point to prevent further water seepage in the optical cable.

[0029] The outer sheath 1 of the optoelectronic hybrid cable is provided with a copper conductor 8, so that the optoelectronic hybrid cable can transmit electrical signals, and the internal cable core can enable the optoelectronic hybrid cable to realize the function of transmitting optical signals; in addition, the surface of the copper conductor in the outer sheath is coated with a ceramic high-temperature insulating varnish, which improves the high-temperature resistance of the copper conductor and can withstand a high temperature of 1700°C. In addition, the ceramic high-temperature insulating varnish has good adhesion, which can prevent the insulating shielding current from passing through at high temperatures and prevent the occurrence of corona discharge; and the insulating varnish coating is dense, has high resistivity, and has a good dielectric constant, and will not produce electron percolation and tunneling effects. At the same time, it has high hardness and good wear resistance, which improves the service life of the copper conductor. In addition, the copper conductor can power the relevant modulation and demodulation equipment of the sensor optical fiber, without the need for external wiring power supply, which is convenient for use.

[0030] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An optoelectronic hybrid cable with high tensile strength and capable of monitoring water seepage, characterized in that: It includes an outer sheath, a water-absorbing resin layer, a cladding layer and a cable core arranged from the outside to the inside; a central reinforcement member is arranged at the center of the cable core, and the central reinforcement member is formed by twisting multiple reinforcement single ropes made of a thermoplastic resin and glass fiber mixed material, and the cable core also includes a filling rope and multiple optical fiber cables arranged around the central reinforcement member; the cladding layer is formed by wrapping a resin and glass fiber mixed tape around the cable core; the water-absorbing resin layer is wrapped on the cladding layer, and a sensing optical fiber is arranged in the water-absorbing resin layer, and the sensing optical fiber is arranged in a spiral forward manner in the water-absorbing resin layer; the outer sheath is wrapped outside the water-absorbing resin layer, and multiple copper wires are arranged inside the outer sheath; the copper wires are coated with ceramic high-temperature insulating paint; the ceramic high-temperature insulating paint is made of inorganic-organic grafted modified resin, nano-scale mica and silicon nitride.

2. The optical-electric hybrid cable with high tensile strength and capable of monitoring water seepage according to claim 1, characterized in that: The optical fiber cable of the cable core is composed of a loose tube, a plurality of optical fiber inner cores and a fiber paste filled between the optical fiber inner cores and the loose tube.

3. The optical-electric hybrid cable with high tensile strength and capable of monitoring water seepage according to claim 1, characterized in that: The cable core is filled with filling grease.

Images