Composite coaxial cable for low frequency

Abstract

The utility model discloses a composite coaxial cable for low frequency, which comprises a main cable core, a first insulating layer, an auxiliary cable core, an adhesive tape filler, a copper wire woven mesh, a tensile support structure, an aluminum foil shielding layer, a multifunctional composite protective layer and an outer sheath, six groups of auxiliary wire cores are distributed on the circumferential surface of the first insulating layer, adhesive tape filler is filled among the six groups of auxiliary wire cores, a copper wire braided fabric is wrapped on the surface of the adhesive tape filler, a tensile supporting structure is wrapped on the circumferential surface of the copper wire braided fabric, and an aluminum foil shielding layer is wrapped on the circumferential surface of the tensile supporting structure. The circumferential surface of the aluminum foil shielding layer is wrapped by a multifunctional composite protection layer, and the circumferential surface of the multifunctional composite protection layer is wrapped by an outer sheath. According to the coaxial cable, through reasonable design, the effect of resisting electromagnetic interference is improved through the double shielding layers, and the tensile supporting effect and the waterproof and flame-retardant effects are further improved in cooperation with the tensile supporting structure and the multifunctional composite protection layer.

Description

Technical Field

[0001] The utility model relates to a coaxial cable, in particular to a coaxial cable for composite low frequency. Background Art

[0002] Composite low-frequency coaxial cable is mainly used for the transmission of low-frequency signals, such as analog and digital signals. The low-frequency coaxial cable currently used has high requirements for shielding effect and needs to be frequently bent and stretched, and has improved flame retardant and waterproof properties. Therefore, a new type of composite low-frequency coaxial cable with good shielding effect, tensile strength, bending resistance, flame retardant and fireproof effect is needed. Utility Model Content

[0003] The purpose of this utility model is to provide a composite low-frequency coaxial cable to solve the above technical problems.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A coaxial cable for composite low frequency, comprising a main core, a first insulating layer, a secondary core, a rubber strip filler, a copper wire braid, a tensile support structure, an aluminum foil shielding layer, a multifunctional composite protective layer, and an outer sheath. The circumferential surface of the main core is wrapped with the first insulating layer, the circumferential surface of the first insulating layer is distributed with six groups of secondary cores and filled with rubber strip fillers, the surface of the rubber strip filler is wrapped with a copper wire braid, the circumferential surface of the copper wire braid is wrapped with a tensile support structure, the circumferential surface of the tensile support structure is wrapped with an aluminum foil shielding layer, the circumferential surface of the aluminum foil shielding layer is wrapped with a multifunctional composite protective layer, and the circumferential surface of the multifunctional composite protective layer is wrapped with an outer sheath.

[0006] Based on the above technical solution, the tensile support structure includes a first reinforcement ring, a second reinforcement ring, a third reinforcement ring, a mounting hole, a wire rope protective cover, and a tensile steel wire rope. The second reinforcement ring is installed on the left end of the first reinforcement ring, and the third reinforcement ring is installed on the left end with an equidistant and symmetrically distributed third reinforcement ring. Twelve groups of mounting holes are opened on the right end surface of the first reinforcement ring, the second reinforcement ring, and the third reinforcement ring. A wire rope protective cover is nested inside the mounting hole, and a tensile steel wire rope is nested inside the wire rope protective cover.

[0007] Based on the above technical solution, the multifunctional composite protective layer includes a waterproof layer, a second insulating layer, a polyurethane thermal insulation layer, and an asbestos woven mesh. The circumferential surface of the waterproof layer is wrapped with the second insulating layer, the circumferential surface of the second insulating layer is wrapped with the polyurethane thermal insulation layer, and the circumferential surface of the polyurethane thermal insulation layer is wrapped with the asbestos woven mesh.

[0008] Compared with the existing technology, the utility model has the following advantages: the coaxial cable of the utility model improves the resistance to electromagnetic interference through the copper wire braided mesh and the aluminum foil shielding layer, and then further improves the tensile strength and support effect of the cable through the reinforcement ring and the tensile steel wire rope in the tensile support structure, and then the polyurethane insulation layer and the asbestos braided mesh in the multifunctional composite protective layer improve the flame retardant and heat insulation effects, and cooperate with the waterproof layer and the second insulating layer to improve the waterproof and insulating effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the appearance structure of the utility model.

[0010] Figure 2 This is a schematic diagram of the tensile support structure of the utility model.

[0011] Figure 3 This is a schematic diagram of the multifunctional composite protective structure of the utility model.

[0012] In the figure: 1. Main core, 2. First insulation layer, 3. Auxiliary core, 4. Rubber strip filler, 5. Copper wire braid, 6. Tensile support structure, 7. Aluminum foil shielding layer, 8. Multifunctional composite protective layer, 9. Outer sheath, 10. First reinforcement ring, 11. Second reinforcement ring, 12. Third reinforcement ring, 13. Mounting hole, 14. Wire rope protective cover, 15. Tensile steel wire rope, 16. Waterproof layer, 17. Second insulation layer, 18. Polyurethane insulation layer, 19. Asbestos braid. DETAILED DESCRIPTION

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] like Figure 1-3 As shown, a composite low-frequency coaxial cable includes a main core 1, a first insulating layer 2, a secondary core 3, a rubber strip filler 4, a copper wire braid 5, a tensile support structure 6, an aluminum foil shielding layer 7, a multifunctional composite protective layer 8, and an outer sheath 9. The circumferential surface of the main core 1 is wrapped with the first insulating layer 2, the circumferential surface of the first insulating layer 2 is distributed with six groups of secondary cores 3 and the spaces between them are filled with rubber strip fillers 4, the surface of the rubber strip filler 4 is wrapped with the copper wire braid 5, the circumferential surface of the copper wire braid 5 is wrapped with the tensile support structure 6, the circumferential surface of the tensile support structure 6 is wrapped with the aluminum foil shielding layer 7, the circumferential surface of the aluminum foil shielding layer 7 is wrapped with the multifunctional composite protective layer 8, and the circumferential surface of the multifunctional composite protective layer 8 is wrapped with the outer sheath 9.

[0015] The tensile support structure 6 includes a first reinforcement ring 10, a second reinforcement ring 11, a third reinforcement ring 12, a mounting hole 13, a wire rope protective cover 14, and a tensile steel wire rope 15. The second reinforcement ring 11 is installed on the left end of the first reinforcement ring 10, and the third reinforcement ring 12 is installed on the left end of the second reinforcement ring 11. Twelve groups of mounting holes 13 are opened on the right end surface of the first reinforcement ring 10, the second reinforcement ring 11, and the third reinforcement ring 12. The wire rope protective cover 14 is nested inside the mounting hole 13, and the tensile steel wire rope 15 is nested inside the wire rope protective cover 14.

[0016] The multifunctional composite protective layer 8 includes a waterproof layer 16, a second insulating layer 17, a polyurethane thermal insulation layer 18, and an asbestos woven mesh 19. The circumferential surface of the waterproof layer 16 is wrapped with the second insulating layer 17, the circumferential surface of the second insulating layer 17 is wrapped with the polyurethane thermal insulation layer 18, and the circumferential surface of the polyurethane thermal insulation layer 18 is wrapped with the asbestos woven mesh 19.

[0017] The working principle of the present invention is as follows: first, the anti-electromagnetic interference effect of the cable is further improved through the copper wire braided mesh and the aluminum foil shielding layer, then the supporting strength of the cable is improved through the multiple groups of reinforcing rings in the tensile support structure and the tensile strength of the cable is improved in conjunction with the tensile steel wire rope, and at the same time, the steel wire rope protective sleeve is used to protect the steel wire rope and the aluminum foil shielding layer and the multifunctional composite protective layer to reduce the damage to other protective layers after the steel wire rope is damaged, and then the polyurethane insulation layer and the asbestos braided mesh in the multifunctional composite protective layer are used to improve the flame retardant and high temperature resistant effects of the cable, and then the waterproof layer and the second insulating layer are used to further improve the waterproof and insulating effects of the cable.

[0018] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, based on the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, replacements and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A composite low-frequency coaxial cable comprising a main core (1), a first insulating layer (2), a secondary core (3), a rubber filler (4), a copper wire braid (5), a tensile support structure (6), an aluminum foil shielding layer (7), a multifunctional composite protective layer (8), and an outer sheath (9), characterized in that: The circumferential surface of the main wire core (1) is wrapped with a first insulating layer (2), the circumferential surface of the first insulating layer (2) is distributed with six groups of secondary wire cores (3) and filled with rubber strip fillers (4), the surface of the rubber strip filler (4) is wrapped with a copper wire braid (5), the circumferential surface of the copper wire braid (5) is wrapped with a tensile support structure (6), the circumferential surface of the tensile support structure (6) is wrapped with an aluminum foil shielding layer (7), the circumferential surface of the aluminum foil shielding layer (7) is wrapped with a multifunctional composite protective layer (8), and the circumferential surface of the multifunctional composite protective layer (8) is wrapped with an outer sheath (9).

2. A composite low-frequency coaxial cable according to claim 1, characterized in that: The tensile support structure (6) comprises a first reinforcement ring (10), a second reinforcement ring (11), a third reinforcement ring (12), a mounting hole (13), a wire rope protective sleeve (14), and a tensile steel wire rope (15). The left end of the first reinforcement ring (10) is mounted with the second reinforcement ring (11), the left end of the second reinforcement ring (11) is mounted with a third reinforcement ring (12) symmetrically distributed at equal distances. Twelve groups of mounting holes (13) are opened on the right end surfaces of the first reinforcement ring (10), the second reinforcement ring (11), and the third reinforcement ring (12), the inner sides of the mounting holes (13) are nested with wire rope protective sleeves (14), and the inner sides of the wire rope protective sleeves (14) are nested with tensile steel wire ropes (15).

3. The composite low-frequency coaxial cable according to claim 1, characterized in that: The multifunctional composite protective layer (8) comprises a waterproof layer (16), a second insulating layer (17), a polyurethane thermal insulation layer (18), and an asbestos braided mesh (19). The circumferential surface of the waterproof layer (16) is wrapped with the second insulating layer (17), the circumferential surface of the second insulating layer (17) is wrapped with the polyurethane thermal insulation layer (18), and the circumferential surface of the polyurethane thermal insulation layer (18) is wrapped with the asbestos braided mesh (19).

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