Lightweight optical cable

Abstract

The present application belongs to the field of cable, and particularly relates to a light optical cable. The light optical cable comprises a sheath layer, a support, an optical fiber line and a power transmission line. The inner surface of the sheath layer is provided with a braided body constraint layer. The support is composed of a plurality of single tubes which are uniformly distributed around the optical cable axis in a U shape in the radial cross section of the optical cable. The single tube is composed of an arc segment and two straight segments. The arc segments of the plurality of single tubes are connected around the axis at the axis of the optical cable to form a central part of the support. The central part is provided with an optical fiber cavity, and the optical fiber line is arranged in the optical fiber cavity. The outer side of the central part is provided with the power transmission line. The outer side of the support and the gap of the braided body constraint layer are filled with a filler. The optical cable is combined with the support and the braided body constraint layer, so that the generation of internal prestress is realized while the lightness of the optical cable is ensured. The optical cable has very excellent compression buffering performance through the deformation of the internal prestress and the specific support structure.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of cables, and particularly relates to a lightweight optical and electrical cable. BACKGROUND

[0002] In recent years, with the development of optical fiber communication and high-voltage power transmission networks, the demand for optical and electrical cables with optical and electrical transmission has greatly increased. However, a series of problems that have not been effectively discovered and solved in the original optical and electrical cables have also arisen.

[0003] For example, the cable itself has high structural stability and is not easily damaged under pressure compared to optical cables. However, the internal space of the optical and electrical cable, which integrates the functions of optical cables and electrical cables, is compact and usually does not have good pressure resistance. At the same time, due to the high specific gravity of the power transmission wire in the cable function structure, it is difficult to apply the conventional optical cable protective layer structure. If the layer structure is increased by increasing the wire diameter, the specific gravity of the optical and electrical cable will be too large, leading to further increase in transportation cost and difficulty in installation.

[0004] Therefore, the current design of the optical and electrical cable protection structure has the important direction of lightweight. However, it is a big difficulty to ensure the lightweight of the optical and electrical cable while having good pressure resistance. SUMMARY

[0005] To solve the problems of poor pressure resistance of existing optical and electrical cables and weak applicability of existing pressure resistance structures to optical and electrical cables, which easily leads to excessive specific gravity of the optical and electrical cable, the present application provides a lightweight optical and electrical cable.

[0006] The main purpose of the present application is to:

[0007] I. improve the pressure resistance of the optical and electrical cable;

[0008] II. ensure the lightweight of the optical and electrical cable while ensuring the pressure resistance of the optical and electrical cable.

[0009] To achieve the above purpose, the present application adopts the following technical solutions.

[0010] A lightweight optical and electrical cable comprises:

[0011] a sheath layer, a support, an optical fiber wire, and a power transmission wire;

[0012] The inner surface of the sheath layer is provided with a woven body constraint layer, which forms constraint and shaping on the support arranged therein;

[0013] The support is composed of a plurality of single pipes in U shape in radial section of the optical cable, which are uniformly distributed around the axis of the optical cable, the single pipe is composed of an arc segment and two straight segments, the arc segments of the plurality of single pipes are connected around the axis at the axis of the optical cable to form a central part of the support body, an optical fiber cavity is arranged in the central part, and the optical fiber wire is arranged in the optical fiber cavity along the axial direction of the optical cable.

[0014] The power transmission wire is arranged between the two straight segments of the same single pipe outside the central part.

[0015] The outer side of the support body and the gap of the constraint layer of the woven body are filled with a filler.

[0016] Preferably,

[0017] The power transmission wire is composed of a bundle pipe and an insulating layer covering the conductive wire.

[0018] Preferably,

[0019] The outer end of the single pipe is turned inward to form an abutting part.

[0020] Preferably,

[0021] The middle part of the straight segment of the single pipe is formed into a circular arc arch outside the single pipe to form an arch structure.

[0022] Preferably,

[0023] The straight segment of the single pipe extends outward from the central part to abut against the inner surface of the constraint layer of the woven body, and the straight segments of the adjacent single pipes cross each other to form a side cavity outside the central part.

[0024] Preferably,

[0025] The abutting part is formed by bending the abutting part of the straight segment of the single pipe and the inner surface of the constraint layer of the woven body outward.

[0026] Preferably,

[0027] An elastic pipe is arranged in the side cavity.

[0028] Preferably,

[0029] The power transmission wire is arranged between the two straight segments of the same single pipe outside the central part and the side cavity.

[0030] The beneficial effects of the present application are:

[0031] The optical cable of the present application realizes the generation of internal prestress while ensuring the light weight of the optical cable through the cooperation of the support body and the braided body constraint layer, and through the internal prestress and the deformation of the specific support body structure, the optical cable has very excellent compression resistance and buffering performance, and the specific structure of the optical cable of the present application can be further distinguished and adjusted to meet different use scenarios and use requirements. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of embodiment 1 of the present application;

[0033] Figure 2 It is a structural schematic diagram of embodiment 2 of the present application;

[0034] Figure 3 It is a stress deformation schematic diagram of the optical cable of embodiment 1 of the present application;

[0035] Figure 4 It is a stress deformation schematic diagram of the optical cable of embodiment 2 of the present application;

[0036] In the figure: 100, sheath layer; 200, braided body constraint layer; 300, support body; 301, single pipe; 3011, straight section; 30111, abutment part; 3012, arc-shaped section; 3013, arch structure; 302, center part; 3021, optical fiber cavity; 303, side cavity; 3031, elastic pipe; 400, filler; 500, optical fiber line; 600, power transmission line; 601, bundle pipe; 602, insulation layer; 603, conductive line; 700, elastic body. DETAILED DESCRIPTION

[0037] The present application will be further described and illustrated in detail in the following in combination with specific embodiments and the accompanying drawings. Those skilled in the art will be able to implement the present application based on these descriptions. In addition, the embodiments of the present application involved in the following description are generally only a part of the embodiments of the present application, not all the embodiments. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments in the present application without making creative efforts shall fall within the scope of protection of the present application.

[0038] In the description of the present application, it should be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., and the meaning of "several" is one or more, unless otherwise explicitly and specifically limited.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicated with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] Unless otherwise specified, the raw materials used in the embodiments of the present application are commercially available or available to those skilled in the art. Unless otherwise specified, the methods used in the embodiments of the present application are methods mastered by those skilled in the art.

[0041] Example 1

[0042] A lightweight optical cable as shown in Figure 1 , which specifically comprises:

[0043] a sheath layer 100, a woven body constraint layer 200, a support, an optical fiber line 500 and a power transmission line 600;

[0044] The inner surface of the sheath layer 100 is provided with the woven body constraint layer 200, which is constructed by using a non-elastic woven fabric, such as a polyester fabric in this embodiment, which is attached to the inner surface of the sheath layer 100 to form a certain constraint and shaping effect on the support inside it;

[0045] The support is composed of a plurality of single tubes 301 in the shape of U in the radial cross section of the optical cable, which are uniformly distributed in the circumferential direction around the optical cable axis, and the single tube 301 is composed of an arc segment 3012 and two straight segments 3011.

[0046] The arc segments 3012 of a plurality of single tubes 301 are connected in the circumferential direction around the axis at the axis of the optical cable to form a center part 302 of the support 300, and the center part 302 is provided with an optical fiber cavity 3021, and the optical fiber line 500 is arranged in the optical fiber cavity 3021 in the axial direction of the optical cable.

[0047] The straight segments 3011 of the single tube 301 extend outwardly from the center part 302 to abut against the inner surface of the woven body constraint layer 200, and the abutment portion 30111 is bent inwardly to the inside of the single tube 301 at the abutment position;

[0048] The power transmission line 600 is provided between the outside of the center part 302 and the two straight segments 3011 of the same single tube 301, and the power transmission line 600 is composed of a bundle tube 601 and an insulating layer 602 covering a conductive wire 603.

[0049] The outer side of the support body 300 is filled with a filler 400 in the gap of the woven body constraint layer 200, and the filler 400 can be a common cable filler 400 such as a filler yarn, a filler rope or a filler ointment. In this embodiment, a filler yarn is used.

[0050] In the above structure, the abutting portion 30111 of the single tube 301 is formed by turning inward the outer end portion of the straight section 3011. The outward turning and inward turning of the outer end portion of the straight section 3011 of the single tube 301 will form a huge functional difference. When the outer end portion is turned outward, the outer end portion of the single tube 301 is the first part directly stressed in the structure of the internal support body 300, which will guide the straight section 3011 of the single tube 301 to turn outward, and due to the constraint of the internal space of the optical cable, the straight section 3011 will bend inward during the folding process to produce a squeezing effect on the power transmission wire 600, so that the power transmission wire 600 can bear the stress as a stress carrier and produce a certain pressure resistance effect. However, it is found in actual use that the dynamic process will cause the filler 400 to produce a certain squeezing effect on the central portion 302 of the support body 300, and when the optical cable is stressed too much, it cannot protect the optical fiber wire 500 inside the optical cable.

[0051] In this embodiment, when the outer end portion of the single tube 301 is turned inward to form the abutting portion 30111, the middle part of the straight section 3011 of the single tube 301 is inclined and arched outward, and the whole gradually bends. The abutting portion 30111 of the same single tube 301 will gradually form abutment as the bending amplitude increases. After forming this trend, further inward extrusion will first act on the power transmission wire 600 to form a first stress carrier, avoiding direct stress on the optical fiber wire 500. At the same time, the arching deformation of the straight section 3011 will actually push the filler 400 outward, generating an outward reaction force while releasing the external force, which can further offset the external force. Compared with the abutting portion 30111 structure formed by outward turning of the outer end portion of the straight section 3011, the inward turning abutting portion 30111 structure can more effectively avoid direct stress on the optical fiber wire 500, and has a significant impact on improving the actual pressure resistance of the optical cable. Under the condition of equal material and equal specification, the actual pressure resistance of the optical cable with the inward turning abutting portion 30111 is improved by about 11% compared with the outward turning abutting portion 30111. That is, in the test environment, when the test result is equal dB (loss rate), the external force on the inward turning abutting portion 30111 is 11% higher than that on the outward turning abutting portion 30111. It can be seen that the folding form of the outer end portion of the straight section 3011 of the single tube 301 in the support body 300 has a significant impact on the pressure resistance performance of the overall optical cable.

[0052] Furthermore,

[0053] The middle part of the straight section 3011 of the single pipe 301 is arched outward to form an arch structure 3013;

[0054] The single pipe 301 is further provided with an elastic body 700 arranged along the optical cable axis, the two sides of the elastic body 700 in the circumferential direction are inserted into the arch structure 3013, and the elastic body 700 is compressed on the outer surface of the center part 302 of the support body 300 by the power line 600, and the outer side of the power line 600 at least abuts against the inner side of the abutting part 30111 of the straight section 3011 of the single pipe 301, so that the elastic body 700 is deformed by space constraint to generate a prestress outward along the radial direction of the optical cable, and no force is generated on the optical fiber line 500 in the optical cable, and under the setting condition, the filling density of the filler 400 needs to be slightly adjusted and increased, and the adjustment is performed in the specific production process to ensure the structural integrity.

[0055] After the above structure is set, as Figure 3 shown, the single pipe 301 of the optical cable has the same deformation trend under stress, but the prestress generated by the elastic body 700 can further avoid the inward conduction of the power line 600, and avoid the direct stress of the optical fiber line 500, thereby further improving the actual compression resistance of the optical cable.

[0056] Embodiment 2

[0057] A lightweight optical cable as Figure 2 shown, which specifically comprises:

[0058] a sheath layer 100, a woven body constraint layer 200, a support, an optical fiber line 500 and a power line 600;

[0059] The inner surface of the sheath layer 100 is provided with the woven body constraint layer 200, the woven body constraint layer 200 is constructed by using a non-elastic woven body fabric, in this embodiment, a polyester fiber fabric is used for construction, and is attached to the inner surface of the sheath layer 100 to form a certain constraint and shaping effect on the support in the sheath layer 100;

[0060] The support is composed of a plurality of single pipes 301 which are uniformly distributed in the circumferential direction around the optical cable axis and have a U-shaped cross section in the radial direction of the optical cable, and the single pipe 301 is composed of an arc-shaped section 3012 and two straight sections 3011;

[0061] The arc-shaped sections 3012 of the plurality of single pipes 301 are connected in the circumferential direction around the optical cable axis to form a center part 302 of the support body 300, and the center part 302 is provided with an optical fiber cavity 3021, and the optical fiber line 500 is arranged in the optical fiber cavity 3021 along the axial direction of the optical cable;

[0062] The straight section 3011 of the single tube 301 extends outwardly from the center part 302 to abut against the inner surface of the braided body constraint layer 200, and the abutment part 30111 is formed by bending outwardly from the outside of the single tube 301, and the straight sections 3011 of the adjacent single tubes 301 cross each other to form the side cavity 303 outside the center part 302;

[0063] The side cavity 303 is provided with an elastic tube 3031;

[0064] The center part 302 and the side cavity 303 are provided with a power transmission wire 600 outside, between the two straight sections 3011 of the same single tube 301, and the power transmission wire 600 is composed of a bundle tube 601 and an insulating layer 602 covering a conductive wire 603;

[0065] The outside of the support body 300 is filled with a filler 400 in the gap of the braided body constraint layer 200, and the filler 400 can be selected from common cable fillers 400 such as filler yarn, filler rope or filler ointment, and the filler yarn is used in the embodiment;

[0066] The embodiment is based on a different concept from that of the embodiment 1, and the pressure resistance is realized in a different way on the basis of the similar structure. The improvement purpose of the embodiment is mainly to improve the power transmission capacity of the optical cable, so that more power transmission wires 600 can be arranged, and the increase in the number of single tubes will inevitably form a cross structure. The main difference is in the folding direction of the abutment part 30111 and the formation of the side cavity 303, as shown in Figure 4 Due to the formation of the side cavity 303, the internal space for arranging the power transmission wire 600 is reduced, and the actual power transmission wire 600 is more likely to directly bear the force and conduct the force inwardly, so that the straight section 3011 of the single tube 301 is bent outwardly and the middle part is arched inwardly to the single tube 301, and the elastic tube 3031 in the side cavity 303 is pushed inwardly, thereby forming the first buffering. Then, the filling area pushes the side cavity 303, the elastic tube 3031 in the side cavity 303 and the power transmission wire 600 inwardly, thereby forming a multi-directional force and avoiding a radial direct force. In the above structure, the pressure resistance of the outwardly arranged abutment part 30111 in the embodiment is about 16% higher than that of the inwardly arranged abutment part 30111, and the pressure resistance is about 1-2% lower than that of the structure with the inwardly arranged abutment part 30111 and the elastic strip in the embodiment 1.

[0067] It can be seen that the optical cable of the application can be adjusted and improved on the basis of the basic structure according to the demand characteristics.

Claims

1. A lightweight optical cable, characterized by Comprise: a sheath layer, a support, an optical fiber line and a power transmission line; the inner surface of the sheath layer is provided with a woven body constraint layer, which forms constraint and shaping for the support arranged therein; the support is composed of a plurality of single tubes in U shape in the radial cross section of the optical cable, which are uniformly distributed around the axis of the optical cable, the single tube is composed of an arc segment and two straight segments, the arc segments of a plurality of single tubes are connected around the axis at the axis of the optical cable to form the central part of the support, the central part is provided with an optical fiber cavity, and the optical fiber line is arranged in the optical fiber cavity along the axial direction of the optical cable; the outer side of the central part and between the two straight segments of the same single tube are provided with the power transmission line; the outer side of the support and the gap of the woven body constraint layer are filled with a filler; the outer end of the single tube is turned inward to form an abutting part; the middle part of the straight segment of the single tube is arched outward to form an arch structure.

2. The lightweight optical cable according to claim 1, wherein: the power transmission line is composed of a bundle tube and an insulating layer covering the conductive line.

3. A lightweight optical cable, characterized by Comprise: a sheath layer, a support, an optical fiber line and a power transmission line; the inner surface of the sheath layer is provided with a woven body constraint layer, which forms constraint and shaping for the support arranged therein; the support is composed of a plurality of single tubes in U shape in the radial cross section of the optical cable, which are uniformly distributed around the axis of the optical cable, the single tube is composed of an arc segment and two straight segments, the arc segments of a plurality of single tubes are connected around the axis at the axis of the optical cable to form the central part of the support, the central part is provided with an optical fiber cavity, and the optical fiber line is arranged in the optical fiber cavity along the axial direction of the optical cable; the outer side of the central part and between the two straight segments of the same single tube are provided with the power transmission line; the outer side of the support and the gap of the woven body constraint layer are filled with a filler; the straight segment of the single tube extends outward from the central part to abut against the inner surface of the woven body constraint layer, and the straight segments of adjacent single tubes intersect with each other to form a side cavity outside the central part; the abutting part of the straight segment of the single tube and the inner surface of the woven body constraint layer is bent outward to form an abutting part.

4. The lightweight optical cable according to claim 3, wherein: the side cavity is provided with an elastic tube.

5. The lightweight optical cable according to claim 3, wherein: the power transmission line is arranged between the two straight segments of the same single tube outside the central part and the side cavity.

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