8-shaped photoelectric composite cable

Abstract

The invention provides an 8-shaped photoelectric composite cable which comprises an optical unit, an electric unit and an outer sheath, the outer sheath comprises a first sheath, a second sheath and a connecting part, the first sheath and the second sheath are arranged in a spaced mode in the first direction, and the connecting part is arranged in the second direction. The connecting part is arranged between the first sheath and the second sheath and is respectively connected with the first sheath and the second sheath, and the outer diameter of the first sheath is larger than that of the second sheath; a first cavity is formed in the first sheath, and a second cavity is formed in the second sheath; the electric units are arranged in the first cavity, the number of the electric units is at least two, the at least two electric units are sequentially arranged in the second direction, the second direction is perpendicular to the first direction, and in the second direction, the width of the first cavity in the first direction is sequentially increased from the two ends of the first cavity to the middle position of the first cavity; the light unit is arranged in the second cavity.

Description

Technical Field

[0001] The present application relates to the field of optoelectronic composite cables, and in particular to an 8-shaped optoelectronic composite cable. Background Art

[0002] The figure-8 optoelectronic composite cable generally places the optical unit and the electrical unit in two sheaths respectively and connects the two sheaths. During use, this type of optoelectronic composite cable may cause cracks at the connection between the outer sheaths of the optical unit and the electrical unit due to frequent bending, and the optical unit is easily broken by external force, which affects the service life of the optoelectronic composite cable. Summary of the invention

[0003] The present application provides an 8-shaped optoelectronic composite cable to solve the problem of low service life of the optoelectronic composite cable in the prior art.

[0004] The present application provides an 8-shaped optoelectronic composite cable, comprising an optical unit, an electrical unit, and an outer sheath, the outer sheath comprising a first sheath, a second sheath, and a connecting portion, along a first direction, the first sheath and the second sheath are arranged at intervals, the connecting portion is arranged between the first sheath and the second sheath and is respectively connected to the first sheath and the second sheath, the outer diameter of the first sheath is greater than the outer diameter of the second sheath; a first cavity is arranged in the first sheath, and a second cavity is arranged in the second sheath; the electrical unit is arranged in the first cavity, the number of the electrical units is set to at least two, along a second direction, at least two of the electrical units are arranged in sequence, the second direction is arranged perpendicular to the first direction, and along the second direction, the width of the first cavity in the first direction increases in sequence from its two ends to its middle position; the optical unit is arranged in the second cavity.

[0005] In a possible implementation manner, the shape of the first cavity is set to be elliptical.

[0006] In a possible implementation, the first cavity includes a first section and a second section, and along the second direction, the second section is connected to one end of the first section; Among them, along the second direction, the width of the first section in the first direction increases gradually from the end away from the second section to the end close to the second section; along the second direction, the width of the second section in the first direction increases gradually from the end away from the first section to the end close to the first section.

[0007] In a possible implementation manner, the number of the electric units is set to two, the two electric units are respectively arranged in the first section and the second section, and the two electric units abut against each other.

[0008] In a possible embodiment, the 8-shaped optoelectronic composite cable also includes a first support member, which is arranged in the first cavity. Along the second direction, the first support member includes a first section and a second section connected in sequence, and one end of the first section away from the second section abuts against the inner wall of the first section, and one end of the second section away from the first section abuts against the inner wall of the second section.

[0009] In a possible implementation, a first receiving groove is formed at one end of the first section away from the second section, and one of the electrical units is accommodated in the first receiving groove; a second receiving groove is formed at one end of the second section away from the first section, and one of the electrical units is accommodated in the second receiving groove.

[0010] In a possible implementation manner, the electrical unit includes a conductor and an insulating layer wrapped around an outer circumference of the conductor, and the first sheath is wrapped around an outer circumference of the insulating layer.

[0011] In a possible implementation, the light unit includes: At least two optical fibers; A reinforcement layer, wrapped around the outer circumference of the at least two optical fibers; The inner protective layer is wrapped around the outer peripheral surface of the reinforcement layer, and the second sheath is wrapped around the outer peripheral surface of the inner protective layer.

[0012] In a possible implementation, the 8-shaped optoelectronic composite cable further includes a second support member, the second support member is arranged in the inner sheath, the second support member includes a central portion and a plurality of extension portions, the plurality of extension portions are arranged around the outer circumference of the central portion, one end of the extension portion is connected to the central portion, and the other end thereof abuts against the inner sheath; Wherein, any two adjacent extension parts are arranged at intervals, and a third receiving groove is formed between any two adjacent extension parts, and each of the third receiving grooves receives one of the optical units or the reinforcement member.

[0013] In a possible implementation manner, an end surface of one end of the extension portion away from the central portion is a curved surface, and surfaces of adjacent sides of any two adjacent extension portions are also curved surfaces.

[0014] The 8-shaped photoelectric composite cable of the present application sets the outer diameter of the first sheath in which the electrical unit is installed to be larger than the second sheath in which the optical unit is installed, so that when the 8-shaped photoelectric composite cable is subjected to external force, the stress is mainly concentrated on the first sheath where the electrical unit is located, reducing the force on the optical unit and avoiding the breakage of the optical unit. In addition, the present application sets the first cavity that accommodates the electrical unit to a special shape so that along the second direction, the width of the first cavity in the first direction increases successively from its two ends to its middle position, thereby avoiding the stress being transferred to the connection part and causing the connection part to break. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of an 8-shaped optoelectronic composite cable of the present application in one embodiment.

[0016] Figure 2 This is a schematic diagram of the internal structure of the first sheath of an 8-shaped optoelectronic composite cable in one embodiment of the present application.

[0017] Figure 3 This is a schematic structural diagram of a second supporting member of an 8-shaped optoelectronic composite cable of the present application in one embodiment.

[0018] Explanation of the main component symbols: 100, 8-shaped optoelectronic composite cable; X, first direction; Z, second direction; Y, third direction; 10, electrical unit; 11, conductor; 12, insulating layer; 20, optical unit; 21, optical fiber; 22, reinforcement layer; 23, inner sheath; 30, outer sheath; 31, first sheath; 310, first cavity; 3101, first section; 3102, second section; 32, second sheath; 320, second cavity; 33, connecting part; 40, first support member; 41, first section; 410, first receiving groove; 411, support arm; 4110, first extension part; 4112, second extension part; 42, second section; 420, second receiving groove; 50, second support member; 51, center part; 510, limit part; 52, extension part; 520, hook part; 53, third receiving groove; 60, reinforcement member.

[0019] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0020] The following description will refer to the accompanying drawings to more fully describe the content of the application. Shown in the accompanying drawings are exemplary embodiments of the application. However, the application can be implemented in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the application thorough and complete, and to fully convey the ratio range of the application to those skilled in the art. Similar reference numerals represent identical or similar components.

[0021] The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include the plural forms. In addition, when used herein, "including" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not exclude the existence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0022] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant technology and the content of this application, and will not be interpreted as an idealized or overly formal meaning.

[0023] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 and Figure 2 As shown, this embodiment provides an 8-shaped optical-electric composite cable 100, including an electrical unit 10, an optical unit 20, and an outer sheath 30. The optical unit 20 and the electrical unit 10 are both arranged in the outer sheath 30, and the outer sheath 30 protects the optical unit 20 and the electrical unit 10.

[0025] In order to facilitate subsequent reading, the present application introduces a first direction X, a second direction Z and a third direction Y to describe the embodiments of the present application. The first direction X, the second direction Z and the third direction Y can be three non-parallel linear directions in space; further, the first direction X, the second direction Z and the third direction Y can be three mutually perpendicular directions in a three-dimensional coordinate system (three-dimensional Cartesian coordinate system). In the subsequent embodiments, the first direction X is the X-axis direction of the coordinate axis of the three-dimensional coordinate system, the second direction Z is the Z-axis direction of the coordinate axis of the three-dimensional coordinate system, and the third direction Y is the Y-axis direction of the coordinate axis of the three-dimensional coordinate system. Among them, the axial extension direction of the 8-shaped optoelectronic composite cable 100 is parallel to the third direction Y.

[0026] The material of the outer sheath 30 is polyvinyl chloride or a low-smoke halogen-free mixture, which has certain anti-UV and anti-rat bite effects. The outer sheath 30 includes a first sheath 31, a second sheath 32, and a connecting portion 33. Along the first direction X, the first sheath 31 and the second sheath 32 are arranged at intervals, the connecting portion 33 is arranged between the first sheath 31 and the second sheath 32, and the two ends of the connecting portion 33 are respectively connected to the first sheath 31 and the second sheath 32. The first sheath 31, the second sheath 32, and the connecting portion 33 are connected in an integral manner, so that the entire outer sheath 30 is directly formed as a whole on the periphery of the optical unit 20 and the electrical unit 10, which not only reduces the manufacturing difficulty of the outer sheath 30, but also reduces the probability of the outer sheath 30 being broken or damaged due to bending during use. In addition, the connection between the connecting portion 33 and the first sheath 31 and the second sheath 32 is a curved surface with a smooth transition to avoid stress concentration at the connection position.

[0027] Optionally, in the second direction Z, the size of the first sheath 31 is D1, the size of the connecting portion 33 is D3, and the size of the second sheath 32 is D2. The range of D1 / D3 is 4.5-6.4, and the range of D2 / D3 is 3.9-5.3. If D3 is too small, the connecting portion 33 is thin, the mechanical properties will be affected, it is easy to tear, and the service life is greatly reduced. If D3 is too large, it will affect the appearance and increase the production cost.

[0028] It will be appreciated that the range of D1 / D3 may be 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, and the like.

[0029] The range of D2 / D3 can be 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1, 5.2, 5.3, etc.

[0030] In another embodiment, in the first direction X, the size of the first sheath 31 is L1, the size of the connecting portion 33 is L3, the size of the second sheath 32 is L2, the range of L1 / L3 is 2.1-35.0, and the range of L2 / L3 is 1.79-29.0. If L3 is too large, the outer diameter of the optical-electric hybrid cable is too long and does not meet the usage scenario. If L3 is too small, the optical unit 20 and the electrical unit 10 are close to each other or even almost connected, and cannot play a bearing role. Therefore, the size of the connecting portion 33 needs to meet the above ratio requirements.

[0031] It will be appreciated that the range of L1 / L3 may be 2.1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, and the like.

[0032] The range of L2 / L3 can be 1.79, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, etc.

[0033] The outer contours of the first sheath 31 and the second sheath 32 are both circular, and the outer diameter of the first sheath 31 is greater than the outer diameter of the second sheath 32. A first cavity 310 is provided in the first sheath 31, and a second cavity 320 is provided in the second sheath 32. The electrical unit 10 is provided in the first cavity 310, and the number of the electrical units 10 is set to at least two, and at least two electrical units 10 are arranged in sequence along the second direction Z. Along the second direction Z, the width of the first cavity 310 in the first direction X increases in sequence from its two ends to its middle position. The optical unit 20 is provided in the second cavity 320.

[0034] Thus, the 8-shaped photoelectric composite cable 100 of the present application sets the outer diameter of the first sheath 31 in which the electrical unit 10 is installed to be larger than the second sheath 32 in which the optical unit 20 is installed, so that when the 8-shaped photoelectric composite cable 100 is subjected to external force, the stress is mainly concentrated on the first sheath 31 where the electrical unit 10 is located, thereby reducing the force on the optical unit 20 and avoiding the breakage of the optical unit 20. In addition, the present application sets the first cavity 310 for accommodating the electrical unit 10 to a special shape, so that along the second direction Z, the width of the first cavity 310 in the first direction X increases successively from its two ends to its middle position, thereby avoiding the stress being transferred to the connection part 33 and causing the connection part 33 to break.

[0035] Please combine again Figure 1 and Figure 2 In one embodiment, the shape of the first cavity 310 is set to be an ellipse. Along the second direction Z, the size of the two ends of the first cavity 310 is smaller than the size of the middle area thereof.

[0036] Specifically, along the second direction Z, the first cavity 310 includes a first section 3101 and a second section 3102 which are sequentially arranged, and the first section 3101 and the second section 3102 are symmetrically arranged. Along the second direction Z, the second section 3102 is connected to one end of the first section 3101 .

[0037] Wherein, along the second direction Z, the width of the first section 3101 in the first direction X increases from the end away from the second section 3102 to the end close to the second section 3102. Along the second direction Z, the width of the second section 3102 in the first direction X increases from the end away from the first section 3101 to the end close to the first section 3101.

[0038] In this way, since the shape of the first sheath 31 is circular and the shape of the first cavity 310 is elliptical, the thickness of the first sheath 31 changes accordingly with the shape of the first cavity 310. When the first sheath 31 is subjected to an external force in the second direction Z, when the stress is transferred from the end region of the first sheath 31 with a smaller thickness to the middle region of the first sheath 31 with a larger thickness, the stress release increases with the increase of the thickness, so that the stress reaching the connecting portion 33 can be released as much as possible, thereby reducing the stress reaching the optical unit 20, and avoiding the breakage of the connecting portion 33 or the breakage of the optical unit 20.

[0039] In this embodiment, the number of the electrical units 10 is set to two, and the two electrical units 10 are respectively arranged in the first section 3101 and the second section 3102. Along the second direction Z, the adjacent sides of the two electrical units 10 abut against each other, and the opposite sides of the two electrical units 10 abut against the inner wall of the first section 3101 and the inner wall of the second section 3102, respectively, so that the two electrical units 10 are firmly fixed in the first cavity 310.

[0040] Please combine again Figure 1 and Figure 2 In one embodiment, the 8-shaped optoelectronic composite cable 100 further includes a first support member 40, which is disposed in the first cavity 310. Along the second direction Z, the first support member 40 includes a first section 41 and a second section 42 connected in sequence. One end of the first section 41 away from the second section 42 abuts against the inner wall of the first section 3101, and one end of the second section 42 away from the first section 41 abuts against the inner wall of the second section 3102, so that when the first sheath 31 is subjected to an external force, part of the external force can be directly transmitted to the first support member 40 through the first support member 40 in contact with the first sheath 31, thereby avoiding more stress from being transmitted to the connecting portion 33 and the optical unit 20, thereby reducing the risk of the connecting portion 33 and the optical unit 20 being broken.

[0041] Optionally, the first support member 40 may be a foam material with buffering properties, so that a portion of the stress can be buffered through the body of the first support member 40 .

[0042] In this embodiment, a first receiving groove 410 is provided at one end of the first section 41 away from the second section 42, and an electric unit 10 is received in the first receiving groove 410. A second receiving groove 420 is provided at one end of the second section 42 away from the first section 41, and an electric unit 10 is received in the second receiving groove 420. In this way, the two electric units 10 are respectively limited in the first receiving groove 410 and the second receiving groove 420, thereby improving the stability of the installation of the two electric units 10.

[0043] In particular, along the first direction X, two adjacent inner walls of the first receiving groove 410 are curved surfaces, so as to guide the electric unit 10 to fall into the bottom wall of the first receiving groove 410 and to abut against the inner wall of the first receiving groove 410 to ensure the stability of the electric unit 10. Correspondingly, along the first direction X, two adjacent inner walls of the second receiving groove 420 are curved surfaces, so as to guide the electric unit 10 to fall into the bottom wall of the second receiving groove 420 and to abut against the inner wall of the second receiving groove 420 to ensure the stability of the electric unit 10.

[0044] It is worth noting that the shape of the first support member 40 can be selected according to actual design requirements. For example, a rectangular structure connecting the first section 41 and the second section 42 can be provided between the two sections.

[0045] Optionally, the surface of the portion where the first support member 40 and the first sheath 31 abut against each other is an arc-shaped surface, so as to reduce the probability that the first sheath 31 is damaged by the first support member 40 when subjected to external force.

[0046] Optionally, the first section 41 and the second section 42 have the same structure and have a certain elasticity. Taking the first section 41 as an example, along the first direction X, the first section 41 includes two support arms 411 arranged opposite to each other, and each support arm 411 includes a first extension portion 4110 and a second extension portion 4112 connected to each other. Among them, the first extension portion 4110 extends in a direction away from the second section 42, and in the direction away from the second section 42, the size of the two first extension portions 4110 arranged opposite to each other in the first direction X gradually decreases. The second extension portion 4112 extends from the first extension portion 4110 to a direction close to the second section 42, and in the direction close to the second section 42, the size of the two second extension portions 4112 arranged opposite to each other in the first direction X gradually decreases and decreases to a size smaller than the outer diameter of the electric unit 10. The structural design of the first section 41 can better fix the position of the electric unit 10, and the design of the second extension portion 4112 facilitates the electric unit 10 to be guided into the first section 41.

[0047] Please combine again Figure 1 and Figure 2In one embodiment, the electrical unit 10 includes a conductor 11 and an insulating layer 12 wrapped around the outer circumference of the conductor 11. The conductor 11 is a metal conductive wire such as a copper wire or an aluminum wire. The first sheath 31 is wrapped around the outer circumference of the insulating layer 12.

[0048] The insulating layer 12 is made of polyvinyl chloride or a low-smoke halogen-free mixture, and the insulating layers 12 of the two electrical units 10 are respectively distinguished by red or blue, so as to facilitate identification of the two electrical units 10 .

[0049] Please combine again Figures 1 to 3 In one embodiment, the optical unit 20 includes at least two optical fibers 21, a reinforcement layer 22, and an inner protective layer 23. The optical fibers 21 in the optical unit 20 may also be in the form of an optical fiber 21 ribbon. The reinforcement layer 22 is wrapped around the outer periphery of the at least two optical fibers 21. The inner protective layer 23 is wrapped around the outer peripheral surface of the reinforcement layer 22, and the second sheath 32 is wrapped around the outer peripheral surface of the inner protective layer 23.

[0050] Further, the 8-shaped optical-electric composite cable 100 further includes a second support member 50. The second support member 50 is disposed in the inner sheath 23. The second support member 50 includes a central portion 51 and a plurality of extension portions 52, the plurality of extension portions 52 are disposed around the outer circumference of the central portion 51, and the plurality of extension portions 52 are disposed in sequence at intervals. One end of the extension portion 52 is connected to the central portion 51, and the other end thereof abuts against the inner sheath 23.

[0051] Any two adjacent extensions 52 are arranged at intervals, and a third receiving groove 53 is formed between any two adjacent extensions 52, and each third receiving groove 53 receives an optical fiber 21 or a reinforcing member 60. When the number of optical fibers 21 is less than the number of third receiving grooves 53, the third receiving groove 53 that does not receive the optical fiber 21 receives the reinforcing member 60 to improve the structural strength. The reinforcing member 60 is a reinforcing element made of non-metallic materials such as reinforcing ropes.

[0052] In a possible implementation, the end surface of the extension portion 52 away from the central portion 51 is a curved surface to better fit the inner circumference of the inner protective layer 23 and reduce the probability of shaking. In addition, the surface of the adjacent side of any two adjacent extension portions 52 is also a curved surface, so that the guide light unit 20 or the reinforcement member 60 can be better accommodated in the third receiving groove 53.

[0053] Or, if Figure 3As shown, a limiting portion 510 extending from the central portion 51 is further provided in two adjacent second extension portions 52. The hardness of the limiting portion 510 is less than that of the extension portion 52. The limiting portion 510 may be formed of a foam material, and an arc portion adapted to the shape of the light unit 20 is provided on the side facing the light unit 20. The structure of the limiting portion 510 made of foam material can also buffer a part of the stress, so as to reduce the probability of damage to the light unit 20. Furthermore, a hook portion 520 with a certain elasticity is further provided at the end of the second extension portion 52 away from the central portion 51. The hook portions 520 at the ends of the two adjacent second extension portions 52 are arranged opposite to each other, and the interval between the two oppositely arranged hook portions 520 is smaller than the outer diameter of the light unit 20, so as to better define the position of the light unit 20.

[0054] In particular, the outer periphery of the second support member 50 is provided with a water-blocking tape layer, and the inner protective layer 23 is provided on the outer periphery of the water-blocking tape layer to ensure the roundness of the cable. The water-blocking tape layer is longitudinally wrapped to reduce the difficulty of cable stripping.

[0055] The following is an illustration of the beneficial effects of this application using actual product tests: Embodiment 1: The 8-shaped optoelectronic composite cable 100 of this embodiment includes an electrical unit 10, an optical unit 20, and an outer sheath 30. The outer sheath 30 includes a first sheath 31, a second sheath 32, and a connecting portion 33. The outer diameter of the first sheath 31 is greater than the outer diameter of the second sheath 32. The shape of the first cavity 310 of the first sheath 31 is elliptical. The number of electrical units 10 is two, and they are respectively arranged in the first section 3101 and the second section 3102 of the first cavity 310. The number of optical units 20 is one, and it is arranged in the second cavity 320 of the second sheath 32. The shape of the second cavity 320 is circular. Among them, in the second direction Z, the size D1 of the first sheath 31 is 9 mm, the size D3 of the connecting portion 33 is 1.5 mm, and the size D2 of the second sheath 32 is 6 mm. In the first direction X, the size L1 of the first sheath 31 is 9 mm, the size L3 of the connecting portion 33 is 2.4 mm, and the size L2 of the second sheath 32 is 6 mm.

[0056] According to the GB / T7424.21 test standard for optical fiber composite cables, the bending performance of the 8-shaped optical fiber composite cable 100 of Example 1 was tested by repeated bending tests. The 8-shaped optical fiber composite cable 100 was in a temperature environment of 23°C, and the load during the test was 20N. The diameter of the experimental mandrel should not be greater than 10 times the length of the short axis. The number of cycles was 25 times. The residual additional attenuation of the optical fiber 21 tested by the 8-shaped optical fiber composite cable 100 was ≤0.118dB@1550nm. After repeated bending experiments, the load was 250N, the mandrel radius was not greater than the dynamic bending radius of the 8-shaped optical fiber composite cable 100, and the cycle was 30 times. At 1550nm, the additional attenuation of the optical fiber 21 was not greater than 0.4dB. Visual inspection showed that the 8-shaped optical fiber composite cable 100 was not damaged. Under a load of 250N, the twisted length was 1m and twisted 90°. After 10 times, the optical fiber 21 had no obvious additional attenuation and returned to its original position. There was no obvious residual additional attenuation and the outer sheath 30 was not cracked.

[0057] Embodiment 2: The 8-shaped optical-electric composite cable 100 of this embodiment is additionally provided with a first support member 40 on the basis of Embodiment 1, and the two electrical units 10 are respectively disposed in the first receiving groove 410 and the second receiving groove 420 .

[0058] According to the test method and test conditions of Example 1, the residual additional attenuation of the optical fiber 21 of the 8-shaped optical fiber composite cable 100 was 0.072db@1550nm, and the residual additional attenuation of the optical fiber 21 was 0.167db@1550nm when the core shaft diameter of the repeated bending test was 50mm. The 8-shaped optical fiber composite cable 100 was not cracked as a whole. The 8-shaped optical fiber composite cable 100 was twisted, and the additional attenuation of the optical fiber 21 was 0.032db, the residual additional attenuation was 0.0067db, and the outer sheath 30 was not cracked. The additional attenuation of the optical fiber 21 was ≤0.030db, which was an uncertainty value and was determined to be no obvious additional attenuation.

[0059] Embodiment 3: The 8-shaped optoelectronic composite cable 100 of this embodiment is additionally provided with a second support member 50 on the basis of Embodiment 1. The second support member 50 is provided with four third receiving grooves 53, wherein two of the third receiving grooves 53 are respectively provided with an optical fiber 21, and the other two third receiving grooves 53 are respectively provided with a reinforcement member 60, and the reinforcement member 60 is a filling rope.

[0060] According to the test method and test conditions of Example 1, the residual additional attenuation of the optical fiber 21 of the 8-shaped optical fiber composite cable 100 was 0.065db@1550nm, and the residual additional attenuation of the optical fiber 21 was 0.158db@1550nm when the core shaft diameter of the repeated bending test was 50mm. The 8-shaped optical fiber composite cable 100 was not cracked as a whole. The additional attenuation of the optical fiber 21 was 0.029db, the residual additional attenuation was 0.0059db, and the outer sheath 30 was not cracked. The additional attenuation of the optical fiber 21 was ≤0.030db, which was an uncertainty value and was determined to be no obvious additional attenuation.

[0061] Embodiment 4: The 8-shaped optical-electric composite cable 100 of this embodiment is additionally provided with the first supporting member 40 in Embodiment 2 and the second supporting member 50 in Embodiment 3 on the basis of Embodiment 1.

[0062] According to the test method and test conditions of Example 1, the residual additional attenuation of the optical fiber 21 of the 8-shaped optical fiber composite cable 100 was 0.057db@1550nm, and the residual additional attenuation of the optical fiber 21 was 0.149db@1550nm when the core shaft diameter of the repeated bending test was 50mm. The 8-shaped optical fiber composite cable 100 was not cracked as a whole. The 8-shaped optical fiber composite cable 100 was twisted, and the additional attenuation of the optical fiber 21 was 0.026db, the residual additional attenuation was 0.0051db, and the outer sheath 30 was not cracked. The additional attenuation of the optical fiber 21 was ≤0.030db, which was an uncertainty value and was determined to be no obvious additional attenuation.

[0063] Comparative Example 1: The 8-shaped optoelectronic composite cable 100 of this embodiment includes an electrical unit 10, an optical unit 20, and an outer sheath 30. The outer sheath 30 includes a first sheath 31, a second sheath 32, and a connecting portion 33. The outer diameter of the first sheath 31 is greater than the outer diameter of the second sheath 32. The first cavity 310 of the first sheath 31 is circular in shape. The number of electrical units 10 is two and they are arranged in the first cavity 310. The number of optical units 20 is one and they are arranged in the second cavity 320 of the second sheath 32. The shape of the second cavity 320 is circular. In the second direction Z, the size D1 of the first sheath 31 is 9 mm, the size D3 of the connecting portion 33 is 1.1 mm, and the size D2 of the second sheath 32 is 6 mm.

[0064] According to the test method and test conditions of Example 1, the residual additional attenuation of the optical fiber 21 tested by the 8-shaped optoelectronic composite cable 100 is ≤0.15dB@1550nm. After repeated bending experiments, the load is 250N, the core shaft radius is not greater than the dynamic bending radius of the 8-shaped optoelectronic composite cable 100, and the cycle is 30 times. At 1550nm, the additional attenuation of the optical fiber 21 is not greater than 0.4dB. Visual inspection shows that the 8-shaped optoelectronic composite cable 100 is not damaged. Under a load of 250N, the twisted length is 1m and twisted 90°. After 10 times, the optical fiber 21 has obvious additional attenuation and returns to its original position, with a certain residual additional attenuation.

[0065] It should be noted that, in the above four embodiments and one comparative example, except for the structure described above, the other disclosed structures and dimensions are the same.

[0066] In the above, the specific embodiments of the present application are described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and substitutions may be made to the specific embodiments of the present application without departing from the ratio range of the present application. These changes and substitutions all fall within the ratio range defined in the present application.

Claims

1. An 8-shaped photoelectric composite cable, characterized in that: include: An outer sheath, comprising a first sheath, a second sheath, and a connecting portion, wherein the first sheath and the second sheath are spaced apart along a first direction, the connecting portion is disposed between the first sheath and the second sheath and is connected to the first sheath and the second sheath respectively, the outer diameter of the first sheath is greater than the outer diameter of the second sheath; a first cavity is disposed in the first sheath, and a second cavity is disposed in the second sheath; An electrical unit is disposed in the first cavity, the number of the electrical units is set to be at least two, at least two electrical units are disposed in sequence along a second direction, the second direction is disposed perpendicular to the first direction, and along the second direction, the width of the first cavity in the first direction increases in sequence from both ends to the middle position thereof; The optical unit is disposed in the second cavity.

2. The figure-8 photoelectric composite cable according to claim 1, characterized in that: The shape of the first cavity is set to be elliptical.

3. The figure-8 photoelectric composite cable according to claim 1, characterized in that: The first cavity includes a first section and a second section, and along the second direction, the second section is connected to one end of the first section; Among them, along the second direction, the width of the first section in the first direction increases gradually from the end away from the second section to the end close to the second section; along the second direction, the width of the second section in the first direction increases gradually from the end away from the first section to the end close to the first section.

4. The figure-8 photoelectric composite cable according to claim 3, characterized in that: The number of the electric units is set to two, the two electric units are respectively arranged in the first section and the second section, and the two electric units abut against each other.

5. The figure-8 photoelectric composite cable according to claim 4, characterized in that: The 8-shaped optoelectronic composite cable also includes a first support member, which is arranged in the first cavity. Along the second direction, the first support member includes a first section and a second section connected in sequence, and one end of the first section away from the second section abuts against the inner wall of the first section, and one end of the second section away from the first section abuts against the inner wall of the second section.

6. The figure-8 photoelectric composite cable according to claim 5, characterized in that: A first receiving groove is formed at one end of the first section away from the second section, and one of the electrical units is received in the first receiving groove; a second receiving groove is formed at one end of the second section away from the first section, and one of the electrical units is received in the second receiving groove.

7. The figure-8 photoelectric composite cable according to claim 1, characterized in that: The electrical unit includes a conductor and an insulating layer wrapped around an outer circumference of the conductor, and the first sheath is wrapped around an outer circumference of the insulating layer.

8. The figure-8 photoelectric composite cable according to claim 1, characterized in that: The light unit comprises: At least two optical fibers; A reinforcement layer, wrapped around the outer circumference of the at least two optical fibers; The inner protective layer is wrapped around the outer peripheral surface of the reinforcement layer, and the second sheath is wrapped around the outer peripheral surface of the inner protective layer.

9. The figure-8 photoelectric composite cable according to claim 8, characterized in that: The 8-shaped optoelectronic composite cable also includes a second support member, which is arranged in the inner sheath, and includes a central portion and a plurality of extension portions, wherein the plurality of extension portions are arranged around the outer circumference of the central portion, one end of the extension portion is connected to the central portion, and the other end thereof abuts against the inner sheath; Wherein, any two adjacent extension parts are arranged at intervals, and a third receiving groove is formed between any two adjacent extension parts, and each of the third receiving grooves receives one optical fiber or a reinforcing member.

10. The figure-8 photoelectric composite cable according to claim 9, characterized in that: The end surface of the extension portion away from the central portion is a curved surface, and the surfaces of the adjacent sides of any two adjacent extension portions are also curved surfaces.

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