Composite cable

Abstract

The composite cable comprises a first cable core and a second cable core, an inner framework, an outer framework, an inner sheath, a flame retardant layer and an outer sheath are sequentially arranged outside the first cable core from inside to outside, the outer wall of the inner framework is provided with a plurality of first mounting holes, the inner wall of the outer framework is provided with a plurality of second mounting holes corresponding to the first mounting holes, and the second mounting holes correspond to the second mounting holes. The first mounting hole and the second mounting hole are inferior arc and major arc sections of the same circular hole, and a concentric hole is formed in the middle of the inner framework. According to the utility model, both the inner frame and the outer frame are made of rubber insulation materials which have good flexibility and insulation performance and can effectively protect and support the first cable core and the second cable core on the premise of not influencing the functions of the inner frame and the outer frame, and the inner frame and the outer frame do not influence each other, so that the service life of the cable is prolonged. Therefore, the conductors in the first cable core and the conductors in the second cable core can operate independently, and the transmission efficiency and the functionality are not interfered.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field especially relates to a composite cable. BACKGROUND

[0002] As a multifunctional cable, composite cable integrates the functions of power transmission and various signal transmission, which can meet the demand of modern communication for diversified signal transmission. Composite cable usually realizes specific functions through different cores, for example, optimizing the cross-sectional shape, side wall thickness and material properties of the core to ensure the quality and efficiency of signal transmission according to different requirements such as signal amplitude and attenuation.

[0003] However, although composite cable has significant advantages in function integration, it still faces some challenges in practical application. The most important problem is that there may be mutual interference between different functional cores, such as electromagnetic coupling, heat conduction or mechanical vibration, which affects the transmission efficiency and functionality of each core, resulting in overall performance degradation. SUMMARY

[0004] The utility model discloses a composite cable to solve the technical problem mentioned in the background art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A composite cable comprises a first core and a second core, and a inner skeleton, an outer skeleton, an inner sheath, a flame-retardant layer and an outer sheath are sequentially arranged from inside to outside outside the first core, a plurality of first installation holes are formed in the outer wall of the inner skeleton, a plurality of second installation holes corresponding to the first installation holes are formed in the inner wall of the outer skeleton, the first installation hole and the second installation hole are the inferior arc and superior arc segment of the same circular hole, a concentric hole is formed in the middle of the inner skeleton, the first core is sleeved in the concentric hole, and the second core is sleeved in the first installation hole and the second installation hole.

[0007] As a further description of the above technical scheme:

[0008] The inner skeleton and the outer skeleton are gap fit, and a fireproof layer composed of inorganic filled fire clay is arranged in the filling gap between them.

[0009] As a further description of the above technical scheme:

[0010] The first core comprises an inner core, a second shielding layer and a steel belt layer which are sequentially covered outside the inner core from inside to outside.

[0011] As a further description of the above technical scheme:

[0012] The second cable core comprises a conductor, a thermoplastic elastomer and a first shielding layer, the conductor is sleeved in the first shielding layer, the thermoplastic elastomer is arranged between the conductor and the first shielding layer, and the thermoplastic elastomer is tangent to the outer wall of the conductor and the inner wall of the first shielding layer.

[0013] As a further description of the above technical solution:

[0014] The first shielding layer and the second shielding layer are woven by tinned copper wires, and the weaving rate is greater than 90%.

[0015] As a further description of the above technical solution:

[0016] The outer side of the first shielding layer and the second shielding layer is covered with a metal foil and a conductive resin layer, and the metal foil overlaps on the conductive resin layer.

[0017] As a further description of the above technical solution:

[0018] The flame-retardant layer is composed of inorganic intumescent flame-retardant fillers.

[0019] As a further description of the above technical solution:

[0020] The outer sheath and the inner sheath are made of cross-linked polyethylene insulating material.

[0021] As described above, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0022] 1、In the utility model, the inner framework and the outer framework are made of rubber insulating material, which has good flexibility and insulation performance, can provide effective protection and support for the first cable core and the second cable core respectively without affecting each other's function, and the conductors in the first cable core and the conductors in the second cable core can operate independently, and their transmission efficiency and functionality will not be disturbed.

[0023] 2、In the utility model, a plurality of first installation holes are formed in the outer wall of the inner framework, a plurality of second installation holes corresponding to the first installation holes are formed in the inner wall of the outer framework, the two groups of installation holes are designed as inferior arc segments and superior arc segments of the same circular hole, forming a complete circular channel for accommodating the second cable core, improving the space utilization rate, and ensuring the stable installation of the second cable core. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A cross-sectional view of a composite cable according to an embodiment of the utility model is shown;

[0025] Figure 2 A cross-sectional view of an inner and outer framework according to an embodiment of the utility model is shown;

[0026] Figure 3 A cross-sectional view of a first cable core is shown according to an embodiment of the present application.

[0027] Figure 4 A cross-sectional view of a second cable core is shown according to an embodiment of the present application.

[0028] Legend:

[0029] 1, outer sheath; 2, flame-retardant layer; 3, inner sheath; 4, outer framework; 401, first mounting hole; 5, second cable core; 51, conductor; 52, thermoplastic elastomer; 53, first shielding layer; 6, fireproof layer; 7, inner framework; 701, second mounting hole; 702, concentric hole; 8, first cable core; 81, inner core; 82, second shielding layer; 83, steel belt layer; 9, filling gap. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0031] Please refer to Figures 1-4The utility model provides a technical scheme: a kind of composite cable, including first cable core 8 and second cable core 5, in first cable core 8 outside, inside from outside sequentially be equipped with inner framework 7, outer framework 4, inner sheath 3, flame-retardant layer 2 and outer sheath 1, flame-retardant layer 2 is made of inorganic intumescent flame-retardant filler, with excellent fireproof performance, can effectively prevent fire spread under extreme conditions such as fire, to protect the safety of cable internal structure, clearance fit between inner framework 7 and outer framework 4, and set a layer of fireproof layer 6 in the filling gap 9 between the two, the fireproof layer is made of inorganic filled fire clay, further enhance the fire resistance of cable, ensure that still can maintain normal working condition under high temperature condition, a plurality of first installation holes 401 are set on the outer wall of inner framework 7, the inner wall of outer framework 4 is equipped with a plurality of second installation holes 701 corresponding with first installation hole 401, the two groups of installation holes are designed as inferior arc segment and superior arc segment of same circular hole, form a complete circular channel, for accommodating second cable core 5, improve space utilization, also ensure the stable installation of second cable core 5, concentric hole 702 is set in the middle of inner framework 7, first cable core 8 is set in concentric hole 702, first cable core 8 can be accurately positioned at the core position of cable, to ensure the efficiency of its signal or power transmission.Both inner framework 7 and outer framework 4 are made of rubber insulation material, this material has good flexibility and insulation performance, can provide effective protection and support to first cable core 8 and second cable core 5 respectively under the premise of not affecting each other's function, since inner and outer framework do not affect each other, therefore, the conductor 81 in first cable core 8 and the conductor 51 in second cable core 5 can operate independently, and their transmission efficiency and functionality will not be disturbed.

[0032] Specifically, as shown in Figure 4 The first cable core 8 includes an inner core 81 and a second shielding layer 82 and a steel belt layer 83 that are sequentially wrapped outside the inner core 81 from inside to outside. The inner core 81 is a copper-clad steel core, which is composed of high-heat-resistant copper alloy wires that are concentrically stranded. The copper-clad steel core is a load-bearing core, which can maintain stable performance in a high-temperature environment. The copper-clad steel core has both electrical conductivity and load-bearing capacity, and it is also used as a load-bearing core to bear the mechanical load of the cable during installation and use, thereby further enhancing the overall strength of the cable. The second shielding layer 82 is tightly wrapped outside the inner core 81 and is mainly used to isolate external electromagnetic interference, ensuring the quality and stability of signal or power transmission. The steel belt layer 83 is usually made of high-strength metal materials, which can effectively resist external physical impact and extrusion, prolonging the service life of the cable core.

[0033] Specifically, as shown in Figure 3As shown, the second cable core 5 comprises a conductor 51, a thermoplastic elastomer 52 and a first shielding layer 53, the conductor 51 is sleeved in the first shielding layer 53, and the thermoplastic elastomer 52 is arranged between the conductor 51 and the first shielding layer 53, the thermoplastic elastomer 52 is in the shape of a cylinder, and the thermoplastic elastomer 52 is tangent to the outer wall of the conductor 51 and the inner wall of the first shielding layer 53, the thermoplastic elastomer 52 is a high polymer material between rubber and resin, which can not only replace part of the rubber, but also modify the plastic, and has a protective effect on the conductor 51.

[0034] Specifically, as shown in Figure 3 and Figure 4 The first shielding layer 53 and the second shielding layer 82 are woven by tinned copper wires, and the weaving rate is greater than 90%, and the outer side of the first shielding layer 53 and the second shielding layer 82 is covered with a metal foil and a conductive resin layer, and the metal foil is overlapped on the conductive resin layer, so that the conductor 51 on the inner and outer skeletons and the inner core 81 have good anti-interference performance, and also can ensure that the conductor 51 on the inner and outer skeletons and the inner core 81 have good mechanical properties, and prevent the conductor 51 and the inner core 81 from being broken.

[0035] Specifically, the outer sheath 1 and the inner sheath 3 are made of cross-linked polyethylene insulating material, which improves the comprehensive properties of the sheath, such as mechanical properties, environmental stress cracking resistance, chemical corrosion resistance, creep resistance and electrical properties. The outer surface of the outer sheath 1 is coated with a wear-resistant coating, which has wear-resistant effect and can improve the wear-resistant performance of the cable, thereby greatly widening the application range of the cable.

[0036] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A composite cable, comprising a first cable core (8) and a second cable core (5), characterized in that, Outside the first cable core (8), from the inside out, there are an inner skeleton (7), an outer skeleton (4), an inner sheath (3), a flame-retardant layer (2) and an outer sheath (1). The outer wall of the inner skeleton (7) is provided with a number of first mounting holes (401), and the inner wall of the outer skeleton (4) is provided with a number of second mounting holes (701) corresponding to the first mounting holes (401). The first mounting holes (401) and the second mounting holes (701) are the inferior and superior arc segments of the same circular hole. The middle part of the inner skeleton (7) is provided with a concentric hole (702). The first cable core (8) is fitted in the concentric hole (702), and the second cable core (5) is fitted in the first mounting hole (401) and the second mounting hole (701).

2. The composite cable according to claim 1, characterized in that, The inner frame (7) and the outer frame (4) are fitted with a gap, and a fireproof layer (6) made of inorganic fireproof mud is provided in the filling gap (9) between them.

3. A composite cable according to claim 2, characterized in that, The first cable core (8) includes an inner core (81) and a second shielding layer (82) and a steel strip layer (83) that are wrapped around it from the inside out.

4. A composite cable according to claim 3, characterized in that, The second cable core (5) includes a conductor (51), a thermoplastic elastomer (52) and a first shielding layer (53). The conductor (51) is sleeved inside the first shielding layer (53), and the thermoplastic elastomer (52) is arranged between the conductor (51) and the first shielding layer (53), and the thermoplastic elastomer (52) is tangent to the outer wall of the conductor (51) and the inner wall of the first shielding layer (53).

5. A composite cable according to claim 4, characterized in that, The first shielding layer (53) and the second shielding layer (82) are made of tin-plated copper wire braiding with a braiding rate of more than 90%.

6. A composite cable according to claim 5, characterized in that, The outer sides of the first shielding layer (53) and the second shielding layer (82) are covered with a metal foil and a conductive resin layer, and the metal foil is overlapped on the conductive resin layer.

7. A composite cable according to claim 6, characterized in that, The flame-retardant layer (2) is composed of an inorganic intumescent flame-retardant filler.

8. A composite cable according to claim 7, characterized in that, Both the outer sheath (1) and the inner sheath (3) are made of cross-linked polyethylene insulation material.

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