Photoelectric signal transmission composite cable

Abstract

The utility model relates to the technical field of communication, in particular to a photoelectric signal transmission composite cable. The utility model aims to provide a photoelectric signal transmission composite cable. The composite cable comprises an optical unit and an electric unit which are arranged in parallel and are connected into a whole through an outer sheath, the optical unit comprises an optical unit cable core, and a flexible reinforcing piece layer, a spiral armor layer and the outer sheath which coat the optical unit cable core from inside to outside, the composite cable is beneficial to stable signal transmission of a product, is convenient to manufacture, install and use, is relatively simple and convenient in preparation process, and is suitable for large-scale popularization and application. Product quality and production efficiency can be improved, and production cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, and in particular to composite cables for photoelectric signal transmission. Background Technology

[0002] With the rapid development of information technology, applications such as high-definition video and big data transmission are becoming increasingly popular, and various types of equipment are placing higher demands on the signal transmission capabilities of cables. Traditional cables can mostly only meet the needs of transmitting single optical or electrical signals; while existing optoelectronic composite cables suffer from problems such as complex structure, complex manufacturing processes, and low production efficiency. For example, the optoelectronic composite cable disclosed in CN220526642U includes optical fiber and a copper transmission wire. The outer side of the copper transmission wire is sequentially provided with a flame-retardant layer, an insulation layer, and a wear-resistant layer from the inside out. The flame-retardant layer is filled with a filler, and an optical fiber is disposed inside the filler. The flame-retardant layer is specifically thermoplastic polyurethane elastomer rubber, and is sleeved on the outside of the copper transmission wire. The insulation layer is specifically polyvinyl chloride, and is bonded to the flame-retardant layer. The wear-resistant layer is specifically a halogen-containing flame-retardant sleeve, and is bonded to the insulation layer. This structural design involves the mixing of optical cable components and electrical cable components, resulting in a complex structure that not only affects signal transmission but also increases the number of steps and workload during production and installation, while also reducing the manufacturing process and production efficiency.

[0003] Therefore, it is of great significance to develop a composite cable that is simple in structure, stable in performance, easy to manufacture, and has the function of photoelectric signal transmission. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the above-mentioned background technology and provide a composite cable for photoelectric signal transmission. This composite cable should be conducive to stable signal transmission, convenient manufacturing and installation, and relatively simple preparation process, which is beneficial to improving product quality and production efficiency and reducing production costs.

[0005] The technical solution provided by this utility model is as follows:

[0006] A composite cable for photoelectric signal transmission, characterized in that: it includes an optical unit and an electrical unit arranged in parallel to each other and connected as one unit by an outer sheath; the optical unit includes an optical unit cable core and a flexible reinforcing layer, a spiral armor layer and the outer sheath that cover the optical unit cable core from the inside out; the electrical unit includes an electrical unit cable core and the outer sheath that covers the electrical unit cable core from the inside out.

[0007] The optical unit cable core includes a loose tube and several tightly packed optical fibers and several water-blocking ropes disposed within the loose tube.

[0008] The electrical unit cable core includes a cross splitter, four double conductors respectively located at the four empty corners of the cross splitter, and two tear ropes symmetrically arranged around the electrical unit cable core.

[0009] The dual conductor comprises two metal conductors and an insulating layer covering each of the two metal conductors.

[0010] The outer sheath has a figure-eight cross-section, and the outer surface of the outer sheath corresponding to the electrical unit has tear grooves for tear ropes extending along the length of the cable; the two tear ropes are set on the inner surface of the outer sheath and correspond one-to-one with the two tear grooves.

[0011] The flexible reinforcing layer is an aramid yarn layer to increase tensile strength.

[0012] The metal conductor is a bundle of high-purity copper wire.

[0013] The spiral armor layer is made of stainless steel threaded armor.

[0014] The outer sheath is made of low-smoke halogen-free material or PVC.

[0015] The material of the cross separator is LSZH, PP or HDPE.

[0016] The beneficial effects of this utility model are:

[0017] 1. The structure is reasonably designed, the functions are clearly defined, and it is suitable for relatively complex application scenarios.

[0018] 2. The preparation process is simple, easy to implement, and low in cost, which improves production efficiency and product quality.

[0019] 3. It uses environmentally friendly materials and meets modern green environmental protection requirements.

[0020] 4. It aligns with the construction company's interests of low-cost construction and easy peeling. Attached Figure Description

[0021] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present invention.

[0022] Figure 2 This is a flowchart of the preparation method described in this utility model.

[0023] The diagram is labeled as follows: Optical Unit 1, Tight-buried Optical Fiber 1-1, Water-blocking Rope 1-2, Loose Tube 1-3, Flexible Reinforcing Member 1-4, Spiral Armoring Layer 1-5, Electrical Unit 2, Metal Conductor 2-1, Insulation Layer 2-2, Cross Separator 2-3, Tear Rope 2-4, Double Conductor Outline (i.e., the outer outline of the stranded double conductor in the length direction) 2-5, Outer Sheath 3, Tear Rope Tear Groove 3-1. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0025] Figure 1 The illustrated photoelectric signal transmission composite cable includes an optical unit and an electrical unit arranged parallel to each other and connected by a suspended outer sheath. The optical unit includes an optical unit cable core and a flexible reinforcing layer 1-4, a spiral armor layer 1-5, and the outer sheath, all wrapped around the optical unit cable core from the inside out. The optical unit cable core includes a loose tube and several tightly packed optical fibers and several water-blocking ropes disposed within the loose tube. The electrical unit includes an electrical unit cable core and the outer sheath, all wrapped around the electrical unit cable core from the inside out. The electrical unit cable core includes a cross splitter, four double conductors respectively disposed at the four empty corners of the cross splitter, and two symmetrically arranged tear ropes. The outer layers of the optical unit and the electrical unit are protected by the same outer sheath, which has a figure-eight shaped cross section. Tear grooves extending along the cable length are formed on the outer surface of the outer sheath corresponding to the electrical unit. The two tear ropes are disposed on the inner surface of the outer sheath, corresponding one-to-one with the two tear grooves.

[0026] The fabrication method of this optoelectronic signal transmission composite cable includes the following steps:

[0027] First, prepare the components of the optical unit and the electrical unit according to the design requirements;

[0028] Step 1: Prepare tight-buffered optical fiber, water-blocking rope, loose tube, and flexible reinforcement. Place the tight-buffered optical fiber and water-blocking rope into the loose tube to ensure the freedom of the optical fiber. Then, wrap the loose tube with the flexible reinforcement and perform spiral armoring to assemble it into an optical unit cable core, increasing its mechanical strength.

[0029] Step 2: Prepare copper wire bundles of metal conductors. After extruding an insulation layer onto the outside of the copper wire bundles using an extruder, twist them into double conductors according to a predetermined color scheme. Then, use a separator to combine the four double conductors into an electrical unit cable core. This increases anti-interference characteristics and ensures stable signal transmission.

[0030] Step 3: The optical unit cable core and the electrical unit cable core are arranged in parallel. The outer sheath is extruded and cooled using an extrusion mold to complete the integrated cable connection. The surface of the electrical unit outer sheath has symmetrical V-shaped tear cord grooves, each corresponding to one of the two tear cords on the inner surface of the outer sheath.

[0031] Step 4: Conduct quality inspection and performance testing on the finished cables.

[0032] Example:

[0033] 1. Material preparation: Select PVC sheathed tightly wrapped / insulated single-mode optical fiber, φ0.5mm copper wire bundle, and water-blocking rope with high expansion rate.

[0034] 2. Optical unit processing: Six tightly packed optical fibers and two 600Dtex water-blocking ropes are placed into a φ2.0 PBT loose tube extruded to ensure the freedom of the optical fibers; then, three 1100Dtex aramid yarns are wrapped around the loose tube, and the loose tube is armored with 304 stainless steel threaded armor; thus forming an optical unit cable core with high mechanical strength.

[0035] 3. Electrical unit processing: The copper wire bundle, which is a metal conductor, is wrapped with an insulation layer to form a conductor. Then, the two conductors are twisted together according to a predetermined color scheme to form a double conductor. Subsequently, a cross-shaped separator made of LSZH material is used as the central component, and a double conductor is placed at each of the four corners of the separator. Finally, they are twisted together in a unidirectional spiral to form an electrical unit cable core to improve the anti-electromagnetic interference performance of copper wire transmission.

[0036] 4. Combined Outer Sheath Treatment: The parallel-arranged optical and electrical unit cores are covered with PVC material to form an "8"-shaped outer sheath, which is then cooled and molded. During the manufacturing process, the electrical unit outer sheath has two symmetrical V-shaped tear cord grooves, each corresponding to one of the two tear cords on the inner surface of the outer sheath. A continuous extrusion process improves production efficiency. The optical and electrical outer sheaths are tightly integrated, ensuring the cable's mechanical strength and signal transmission performance while also facilitating tearing and stripping during installation.

[0037] 5. Quality Inspection: Conduct comprehensive optical and electrical performance tests on finished cables to ensure compliance with communication standards.

Claims

1. An optical and electrical signal transmission composite cable, characterized by: The composite cable comprises optical unit (1) and electric unit (2) which are arranged in parallel and integrated by outer sheath (3); the optical unit comprises optical unit cable core and flexible strength member layer (1-4), spiral armor layer (1-5) and outer sheath which are covered outside the optical unit cable core from inside to outside; the electric unit comprises electric unit cable core and outer sheath which are covered outside the electric unit cable core from inside to outside; The optical unit cable core comprises loose tube (1-3) and several tight-packaged optical fibers (1-1) and several water-blocking ropes (1-2) which are arranged in the loose tube; The electric unit cable core comprises cross separator (2-3), four double conductors which are arranged in four empty corner parts of the cross separator respectively and two symmetrically arranged tear ropes (2-4).

2. The optical and electrical signal transmission composite cable of claim 1, wherein: The double conductor comprises two metal conductors (2-1) and insulation layer (2-2) which covers the two metal conductors respectively.

3. The optical and electrical signal transmission composite cable of claim 2, wherein: The outer sheath is in the shape of 8, and the outer surface of the outer sheath corresponding to the electric unit is provided with tear rope tear grooves (3-1) which extend along the length direction of the cable; the two tear ropes are arranged on the inner surface of the outer sheath and correspond to the two tear rope tear grooves respectively.

4. The optical and electrical signal transmission composite cable of claim 3, wherein: The flexible strength member layer is aramid yarn layer to increase tensile strength.

5. The optical and electrical signal transmission composite cable of claim 4, wherein: The metal conductor is high-purity copper wire bundle; the spiral armor layer is stainless steel thread armor.

6. The optical and electrical signal transmission composite cable of claim 5, wherein: The material of the outer sheath is low-smoke halogen-free material or PVC; the material of the cross separator is LSZH, PP or HDPE.

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