CN103811129B - A kind of preparation method of the counter-bending photoelectric mixed cable with interference of field operations - Google Patents

Abstract

The invention discloses a field-bending and interference-resistant photoelectric hybrid cable, which includes a shielded insulating cable core, a drain wire, a load-bearing fiber, an optical unit, a total shielding layer and an outer sheath layer, a shielded insulating cable core, a drain wire, Both the load-bearing fiber and the optical unit are distributed in the outer sheath layer, and the total shielding layer is wrapped around the shielded insulating cable core and the optical unit. The invention also discloses a preparation method of a field-bending and interference-resistant photoelectric hybrid cable. The application of aluminum-plastic composite tape as the shielding layer not only prevents interference and crosstalk between insulated wires, but also plays an anti-interference effect on the insulated wire itself; the use of drainage wires effectively guides the signal, and the use of aramid fiber makes the tensile strength of the cable significantly Increase; the loose sleeve spiral steel tape armor layer is used to effectively protect the optical unit, prevent it from being flattened and broken by the cable, and increase the bending capacity of the optical cable. Such a structure significantly meets the laying requirements, improves the anti-bending and anti-interference capabilities, and is suitable for use in field environments.

Description

Preparation method of a field-bending and interference-resistant optoelectronic hybrid cable

technical field

The invention relates to a photoelectric hybrid cable, in particular to a field-combat anti-bending and interference photoelectric hybrid cable.

The invention also relates to a preparation method of a field-bending and interference-resistant photoelectric hybrid cable.

Background technique

Due to the poor bending resistance of traditional optical cables, especially after being mixed with cables, the bending resistance is even worse, the transmission capacity of the cables is insufficient, and it is easy to crosstalk, but it cannot be removed due to the role of electricity transmission. Therefore, it is necessary to provide a new technical solution to solve the above problems.

Contents of the invention

In order to solve the above problems, the present invention provides a field anti-bending and interference photoelectric hybrid cable, which organically combines optical cables and cables, and meets the functions of anti-bending and anti-interference, and is especially suitable for use in field environments.

The invention also provides a preparation method of a field-bending and interference-resistant photoelectric hybrid cable.

The technical scheme adopted in the present invention is:

A field-bending and interference-resistant photoelectric hybrid cable, which includes a shielded insulating cable core, a drain wire, a load-bearing fiber, an optical unit, a total shielding layer and an outer sheath layer, and the shielded insulating cable core, drain wire, load-bearing Both the fiber and the optical unit are distributed in the outer sheath layer, and the overall shielding layer is wrapped around the shielded insulating cable core and the optical unit;

The shielded and insulated cable core includes a plurality of shielded and insulated cable conductors, each shielded and insulated cable conductor is extruded with a layer of ethylene-tetrafluoroethylene insulation layer, and a layer of aluminum-plastic composite is wrapped around the ethylene-tetrafluoroethylene insulation layer. with shielding layer;

The load-bearing fiber is composed of multiple aramid fibers, and every two aramid fibers are twisted in pairs. One pair of aramid fibers is used as the center line, and the aramid fiber used as the center line is covered with a polyurethane sheath. The remaining pairs are respectively connected to the shielded insulating cable core, Optical unit twisting;

The optical unit is sequentially composed of a plurality of primary coated multimode optical fibers, a low-smoke halogen-free secondary coating core layer and a loose-tube spiral steel tape armor layer from the inside to the outside.

Each shielded insulated cable conductor is stranded silver plated copper.

The drain wire is composed of a silver-plated copper stranded wire.

The overall shielding layer is braided by silver-plated round copper wires.

The outer sheath layer is extruded from polyurethane.

A method for preparing a field-bending and interference-resistant photoelectric hybrid cable, comprising the steps of:

(1) Preparation of shielded insulating cable core:

a. Use a wire drawing machine or a wire and cable stranding machine to draw or twist a single or multiple silver-plated copper wires as a conductor. The twisting pitch ratio of the conductor is 8 to 10 times the outer diameter of the conductor, and the twisting direction is S Towards;

b. Use a high-temperature screw extruder to extrude a layer of ethylene-tetrafluoroethylene resin as an insulating layer outside the conductor, and pass through a hot water tank, an air-cooled guide wheel passing groove, and a normal temperature water tank. The temperature of the hot water tank is 80±2°C. The temperature of the air-cooled guide wheel passing through the line groove is normal temperature, the temperature of the normal temperature water tank is the ambient temperature, the temperature curve of each area of the screw is 240, 250, 260, 270, 290, 320, the screw speed of production is 2.5-2.8rpm, the traction speed 12-14m/min;

c. Use a horizontal active unwinding production line outside the insulating layer to wrap the aluminum-plastic composite tape;

(2) Preparation of light unit:

a. Strand multiple once-coated multimode optical fibers through a small active pay-off and cable-forming machine. The pitch ratio of the stranding is 12 to 14 times the outer diameter of the conductor, and the stranding direction is the Z direction;

b. Use a room temperature screw extruder to extrude the low-smoke and halogen-free secondary core layer;

c. The optical unit cable core is placed in the loose sleeve spiral steel tape armor layer through the spiral armoring equipment, and the production speed is controlled at 0.8-1m/min;

(3) After the above units are completed, use a planetary cage type cable forming machine to twist the aramid fiber, shielded insulating cable core, and optical unit into a photoelectric hybrid unit. The twisting pitch is 8 to 10 times the outer diameter of the cable. The direction is S direction;

(4) After the cable core is made, use a braiding machine to weave silver-plated round copper wires to make the total shielding layer;

(5) After the total shielding layer is made, use a room temperature screw extruder to extrude polyurethane plastic, and set the temperature curve according to 140, 150, 160, 170, 180, 185°C for production, and carry out color matching at the same time. The screw speed for production is 2.5 -3rpm, traction speed is 6-8m/min.

When the aluminum-plastic composite tape is wrapped outside the insulating layer, the bandwidth of the wrap is 6mm, the pitch is 3.996mm, the direction is S, the tension of the active tape is controlled at 10-12N, the speed is 800rpm, and the wrapping angle is 60± 2°.

In step (5), the color matching is fully mixed with the base material and the color masterbatch at a mass ratio of 100: (2-3).

In step (5), the thermoplastic urethane plastic is placed at a set temperature of 60±2° C. for 24-26 hours before extruding the polyurethane plastic.

Beneficial effects of the present invention: the use of aluminum-plastic composite tape as a shielding layer not only prevents interference and crosstalk between insulated wires, but also plays an anti-interference effect on the insulated wire itself; the use of drainage wires effectively guides signals, and the use of aramid fibers makes The tensile strength of the cable is greatly increased; the loose-tube spiral steel tape armor layer is used to effectively protect the optical unit from being flattened and broken by the cable, and to increase the bending capacity of the cable. Such a structure significantly meets the laying requirements and improves the anti-bending and anti-interference capabilities. The optical fiber transmission achieves low loss, and the optical-electrical hybrid cable reduces the laying space and manufacturing cost of the cable, and is suitable for use in field environments.

Description of drawings

Figure 1 is a schematic cross-sectional view of the present invention.

Fig. 2 is a schematic cross-sectional view of the shielded insulating cable core in Fig. 1 .

FIG. 3 is a schematic cross-sectional view of the light unit in FIG. 1 .

Among them: 1. Shielded insulating cable core, 2. Drainage wire, 3. Bearing fiber, 4. Polyurethane sheath, 5. Light unit, 6. Overall shielding layer, 7. Outer sheath layer, 8. Shielded insulated cable conductor , 9, ethylene - tetrafluoroethylene insulation layer, 10, aluminum-plastic composite tape shielding layer, 11, optical fiber, 12, low-smoke halogen-free secondary core layer, 13, loose sleeve spiral steel tape armor layer.

detailed description

In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the embodiments and accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

As shown in Figures 1 to 3, a field anti-bending and interference photoelectric hybrid cable of the present invention includes a shielded insulating cable core 1, a drain wire 2, a load-bearing fiber 3, an optical unit 5, a total shielding layer 6 and an outer The sheath layer 7, the shielded insulating cable core 1, the drain wire 2, the load-bearing fiber 3 and the optical unit 5 are all distributed in the outer sheath layer 7, and the total shielding layer 6 is wrapped around the shielded insulating cable core 1 and the optical unit 5; The insulated cable core 1 includes 4 shielded and insulated cable conductors 8 (4 as shown in Figure 1), each shielded and insulated cable conductor 8 is a silver-plated copper strand, and a layer is extruded outside each shielded and insulated cable conductor 8 The ethylene-tetrafluoroethylene insulating layer 9 is wrapped with a layer of aluminum-plastic composite tape shielding layer 10 outside the ethylene-tetrafluoroethylene insulating layer 9; the load-bearing fiber 3 is composed of 12 aramid fibers (4 in Fig. 1 ), the type of aramid fiber is 3120D, every two pairs of aramid fibers are twisted, one pair of aramid fiber is used as the center line, and the aramid fiber used as the center line is covered with a polyurethane sheath 4, and the remaining 5 pairs are respectively connected with the shielded insulating cable core 1 and the optical unit 5 stranding; the optical unit 5 consists of 6 primary coated multimode optical fibers 11 (6 shown in Figure 1), a low-smoke and halogen-free secondary core layer 12 and a loose-tube spiral steel tape armor layer from the inside to the outside. 13 compositions. The optical fiber 11 is suitably selected with a specification of 62.2/12 5 μm.

The drain wire 2 is composed of a 19/0.16mm silver-plated copper strand; the overall shielding layer 6 is braided by silver-plated round copper wires; the outer sheath layer 7 is extruded from polyurethane.

Embodiments 1-3 are embodiments of a method for preparing a field-bending and interference-resistant optical-electrical hybrid cable.

Example 1

A method for preparing a field-bending and interference-resistant photoelectric hybrid cable, comprising the steps of:

(1) Preparation of shielded insulating cable core:

a. Use a wire drawing machine or a wire and cable stranding machine to draw or twist a single or multiple silver-plated copper wires as a conductor. The twisting pitch ratio of the conductor is 8 times the outer diameter of the conductor, and the twisting direction is S direction;

b. Use a high-temperature screw extruder to extrude a layer of ethylene-tetrafluoroethylene resin as an insulating layer outside the conductor, and pass through a hot water tank, an air-cooled guide wheel passing groove, and a normal temperature water tank. The temperature of the hot water tank is 78 ° C. Air cooling The temperature of the guide wheel trough is normal temperature, the temperature of the normal temperature water tank is the ambient temperature, the temperature curves of each area of the screw are 240, 250, 260, 270, 290, 320, the inner and outer molds produced are 7mm/15mm, and the produced screw speed is 2.5rpm, traction speed is 12m/min;

c. Use a horizontal active unwinding production line outside the insulating layer to wrap the aluminum-plastic composite tape. The width of the wrapping is 6mm, the pitch is 3.996mm, and the direction is S. The tension of the active unwinding is controlled at 10N and the speed is 800rpm , the wrapping angle is 58°;

(2) Preparation of light unit:

a. Strand 6 pieces of 62.2/12 5μm once-coated multimode optical fibers through a small active pay-off and cable-forming machine. The twisting pitch ratio is 12 times the outer diameter of the conductor, and the twisting direction is the Z direction;

b. Use a room temperature screw extruder to extrude the low-smoke and halogen-free secondary core layer;

c. Place the optical unit cable core in the loose-tube spiral steel tape armor layer through the spiral armoring equipment. The inner diameter of the loose-tube spiral steel tape armor layer is 1.3 mm, the outer diameter is 1.7 mm, and the pitch of the armor is 8 circle/cm, the thread pitch is 1.0mm, and the production speed is controlled at 0.8m/min;

(3) After the above units are completed, the aramid fiber, shielded insulating cable core, and optical unit are twisted into a photoelectric hybrid unit with a planetary cage cable forming machine with active tension belt untwisted, and the twisting pitch is 8 times the outer diameter of the cable. times, the stranding direction is S direction;

(4) After the cable core is made, use a braiding machine to weave silver-plated round copper wires to make the total shielding layer. The braiding machine model is a 24-spindle braiding machine, and the diameter of the monofilament used for silver-plated round copper wires is 0.16mm;

(5) After the total shielding layer is made, use a room temperature screw extruder to extrude polyurethane plastics. Before extrusion, place thermoplastic polyurethane plastics at a set temperature of 58°C for 24 hours to remove moisture in the plastics. Reproduction press 140, Set the temperature curve at 150, 160, 170, 180, and 185°C, and carry out color matching at the same time. The base material and color masterbatch are fully mixed according to the mass ratio of 100:2. The inner and outer molds produced are 12mm/16mm, and the screw speed is 2.5rpm , The traction speed is 6m/min.

Example 2

A method for preparing a field-bending and interference-resistant photoelectric hybrid cable, comprising the steps of:

(1) Preparation of shielded insulating cable core:

a. Use a wire drawing machine or a wire and cable stranding machine to draw or twist a single or multiple silver-plated copper wires as a conductor. The twisting pitch ratio of the conductor is 9 times the outer diameter of the conductor, and the twisting direction is S direction;

b. Use a high-temperature screw extruder to extrude a layer of ethylene-tetrafluoroethylene resin as an insulating layer outside the conductor, and pass through a hot water tank, an air-cooled guide wheel passing groove, and a normal temperature water tank. The temperature of the hot water tank is 80 ° C. Air cooling The temperature of the guide wheel trough is normal temperature, the temperature of the normal temperature water tank is the ambient temperature, the temperature curves of each area of the screw are 240, 250, 260, 270, 290, 320, the inner and outer molds produced are 7mm/15mm, and the produced screw speed is 2.7rpm, traction speed is 13m/min;

c. Use a horizontal active unwinding production line outside the insulating layer to wrap the aluminum-plastic composite tape. The width of the wrapping is 6mm, the pitch is 3.996mm, and the direction is S. The tension of the active unwinding is controlled at 11N and the speed is 800rpm , the wrapping angle is 60°;

(2) Preparation of light unit:

a. Strand 6 pieces of 62.2/12 5μm once-coated multimode optical fibers through a small active pay-off and cable-forming machine. The twisting pitch ratio is 13 times the outer diameter of the conductor, and the twisting direction is the Z direction;

b. Use a room temperature screw extruder to extrude the low-smoke and halogen-free secondary core layer;

c. Place the optical unit cable core in the loose-tube spiral steel tape armor layer through the spiral armoring equipment. The inner diameter of the loose-tube spiral steel tape armor layer is 1.3 mm, the outer diameter is 1.7 mm, and the pitch of the armor is 8 Turns/cm, the thread pitch is 1.0mm, and the production speed is controlled at 0.9m/min;

(3) After the above units are completed, the aramid fiber, shielded insulating cable core, and optical unit are twisted into a photoelectric hybrid unit with a planetary cage cable forming machine with active tension belt untwisted, and the twisting pitch is 9 times the outer diameter of the cable. times, the stranding direction is S direction;

(4) After the cable core is made, use a braiding machine to weave silver-plated round copper wires to make the total shielding layer. The braiding machine model is a 24-spindle braiding machine, and the diameter of the monofilament used for silver-plated round copper wires is 0.16mm;

(5) After making the total shielding layer, use a room temperature screw extruder to extrude polyurethane plastics. Before extrusion, place thermoplastic polyurethane plastics at a set temperature of 60°C for 25 hours to remove moisture in the plastics. Reproduction press 140, Set the temperature curve at 150, 160, 170, 180, 185°C, and carry out color matching at the same time. The base material and color masterbatch are fully mixed according to the mass ratio of 100:2.5. The inner and outer molds produced are 12mm/16mm, and the screw speed is 2.7rpm , the traction speed is 7m/min.

Example 3

A method for preparing a field-bending and interference-resistant photoelectric hybrid cable, comprising the steps of:

(1) Preparation of shielded insulating cable core:

a. Use a wire drawing machine or a wire and cable stranding machine to draw or twist a single or multiple silver-plated copper wires as a conductor. The twisting pitch ratio of the conductor is 10 times the outer diameter of the conductor, and the twisting direction is S direction;

b. Use a high-temperature screw extruder to extrude a layer of ethylene-tetrafluoroethylene resin as an insulating layer outside the conductor, and pass through a hot water tank, an air-cooled guide wheel passing groove, and a normal temperature water tank. The temperature of the hot water tank is 82 ° C. Air cooling The temperature of the guide wheel trough is normal temperature, the temperature of the normal temperature water tank is the ambient temperature, the temperature curves of each area of the screw are 240, 250, 260, 270, 290, 320, the inner and outer molds produced are 7mm/15mm, and the produced screw speed is 2.8rpm, traction speed is 14m/min;

c. Use a horizontal active unwinding production line outside the insulating layer to wrap the aluminum-plastic composite tape. The width of the wrapping is 6mm, the pitch is 3.996mm, and the direction is S. The tension of the active unwinding is controlled at 12N and the speed is 800rpm , the wrapping angle is 62°;

(2) Preparation of light unit:

a. Strand 6 pieces of 62.2/12 5μm once-coated multimode optical fibers through a small active pay-off and cable-forming machine. The twisting pitch ratio is 14 times the outer diameter of the conductor, and the twisting direction is the Z direction;

b. Use a room temperature screw extruder to extrude the low-smoke and halogen-free secondary core layer;

c. Place the optical unit cable core in the loose-tube spiral steel tape armor layer through the spiral armoring equipment. The inner diameter of the loose-tube spiral steel tape armor layer is 1.3 mm, the outer diameter is 1.7 mm, and the pitch of the armor is 8 circle/cm, the thread pitch is 1.0mm, and the production speed is controlled at 1m/min;

(3) After the above units are completed, the aramid fiber, shielded insulating cable core, and optical unit are twisted into a photoelectric hybrid unit with a planetary cage cable-forming machine with active tension belt untwisted, and the twisting pitch is 10 of the outer diameter of the cable. times, the stranding direction is S direction;

(4) After the cable core is made, use a braiding machine to weave silver-plated round copper wires to make the total shielding layer. The braiding machine model is a 24-spindle braiding machine, and the diameter of the monofilament used for silver-plated round copper wires is 0.16mm;

(5) After the total shielding layer is made, use a normal temperature screw extruder to extrude polyurethane plastics. Before extrusion, place thermoplastic polyurethane plastics at a set temperature of 62°C for 26 hours to remove moisture in the plastics. Press 140, The temperature curve is set at 150, 160, 170, 180, and 185°C, and the color matching is carried out at the same time. The base material and the color masterbatch are fully mixed according to the mass ratio of 100: 3. The inner and outer molds produced are 12mm/16mm, and the screw speed is 3rpm. Traction speed is 8m/min.

The application of aluminum-plastic composite tape as the shielding layer not only prevents interference and crosstalk between the insulated wires, but also plays an anti-interference effect on the insulated wire itself; the use of drain wires effectively guides the signal, and the use of aramid fibers greatly increases the tensile strength of the cable Increase; the loose sleeve spiral steel tape armor layer is used to effectively protect the optical unit, prevent it from being flattened and broken by the cable, and increase the bending capacity of the optical cable. Such a structure significantly meets the laying requirements, improves the anti-bending and anti-interference capabilities, and is suitable for use in field environments.

The advantage of the preparation method of the photoelectric hybrid cable is that it is designed in consideration of the poor tensile strength of the cable and the disadvantages of easy compression and increased loss after the cable is twisted, adding a loose sleeve spiral steel tape armoring process to protect the cable, and using ethylene-tetrafluoroethylene Ethylene achieves weight reduction, and aramid fibers greatly increase the tensile strength of cables.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any other form, and any modification or equivalent change made according to the technical essence of the present invention still belongs to the scope of protection required by the present invention .

Claims (4)

1. A preparation method of a field anti-bending and interference photoelectric hybrid cable, characterized in that, the photoelectric hybrid cable includes shielded insulating cable core, drain wire, load-bearing fiber, optical unit, total shielding layer and outer sheath , the shielded insulating cable core, drain wire, load-bearing fiber and optical unit are all distributed in the outer sheath layer, and the total shielding layer is wrapped around the shielded insulating cable core and the optical unit; the shielded insulating cable core includes a plurality of Shielded and insulated cable conductors, each shielded and insulated cable conductor is extruded with a layer of ethylene-tetrafluoroethylene insulation layer, and a layer of aluminum-plastic composite tape shielding layer is wrapped around the ethylene-tetrafluoroethylene insulation layer; the load-bearing fiber Composed of multiple aramid fibers, every two pairs of aramid fibers are twisted, one pair of aramid fiber is used as the center line, and the aramid fiber used as the center line is covered with a polyurethane sheath, and the remaining pairs are twisted with the shielded insulating cable core and the optical unit respectively; The optical unit is sequentially composed of a plurality of primary coated multimode optical fibers, a low-smoke halogen-free secondary core layer and a loose-tube spiral steel tape armor layer from the inside to the outside; the preparation method of the photoelectric hybrid cable includes the following steps: (1) Preparation of shielded insulating cable core: a. Use a wire drawing machine or a wire and cable stranding machine to draw or twist a single or multiple silver-plated copper wires as a conductor. The twisting pitch ratio of the conductor is 8 to 10 times the outer diameter of the conductor, and the twisting direction is S Towards; b. Use a high-temperature screw extruder to extrude a layer of ethylene-tetrafluoroethylene resin as an insulating layer outside the conductor, and pass through a hot water tank, an air-cooled guide wheel passing groove, and a normal temperature water tank. The temperature of the hot water tank is 80±2°C. The temperature of the air-cooled guide wheel passing through the line groove is normal temperature, the temperature of the normal temperature water tank is the ambient temperature, the temperature curve of each area of the screw is 240, 250, 260, 270, 290, 320, the screw speed of production is 2.5-2.8rpm, the traction speed 12-14m/min; c. Use a horizontal active unwinding production line outside the insulating layer to wrap the aluminum-plastic composite tape; (2) Preparation of light unit: a. Strand multiple once-coated multimode optical fibers through a small active pay-off and cable-forming machine. The pitch ratio of the stranding is 12 to 14 times the outer diameter of the conductor, and the stranding direction is the Z direction; b. Use a room temperature screw extruder to extrude the low-smoke and halogen-free secondary core layer; c. The optical unit cable core is placed in the loose sleeve spiral steel tape armor layer through the spiral armoring equipment, and the production speed is controlled at 0.8-1m/min; (3) After the above units are completed, use a planetary cage type cable forming machine to twist the aramid fiber, shielded insulating cable core, and optical unit into a photoelectric hybrid unit. The twisting pitch is 8 to 10 times the outer diameter of the cable, and the twisting direction For S direction; (4) After the cable core is made, the silver-plated round copper wire is braided by a braiding machine to make the total shielding layer; (5) After the total shielding layer is made, use a normal temperature screw extruder to extrude polyurethane plastics, and set the temperature curve according to 140, 150, 160, 170, 180, 185°C for production, and carry out color matching at the same time. The screw speed for production is 2.5- 3rpm, traction speed is 6-8m/min. 2. the preparation method of a kind of field anti-bending and interference-resistant photoelectric hybrid cable according to claim 1 is characterized in that: when the aluminum-plastic composite tape is wrapped outside the insulating layer, the bandwidth of the wrap is 6mm, and the pitch is 3.996mm, the direction is S direction, the tension of the active tape is controlled at 10-12N, the speed is 800rpm, and the wrapping angle is 60±2°. 3. A method for preparing a field-bending and interference-resistant photoelectric hybrid cable according to claim 1, characterized in that: in step (5), the base material and color masterbatch are used for color matching in a mass ratio of 100:(2-3 ) for thorough mixing. 4. The method for preparing a field-bending and interference-resistant photoelectric hybrid cable according to claim 1, characterized in that: in step (5), before extruding the polyurethane plastic, the thermoplastic urethane plastic is heated at a temperature of 60 Place at ±2°C for 24-26 hours.