CN224005686U

CN224005686U - Miniaturized radiation-resistant and interference-resistant coaxial cable

Info

Publication number: CN224005686U
Application number: CN202520714994.7U
Authority: CN
Inventors: 李丽; 王雪莲; 李红征
Original assignee: Kunshan Qishuo Electronic Technology Co ltd
Current assignee: Kunshan Qishuo Electronic Technology Co ltd
Priority date: 2025-04-16
Filing date: 2025-04-16
Publication date: 2026-03-17
Anticipated expiration: 2035-04-16

Abstract

This utility model discloses a miniaturized radiation-resistant and interference-resistant coaxial cable, belonging to the field of coaxial cable technology. Key technical features include a coaxial cable body comprising several inner conductors. A composite insulation layer is disposed on the surface of each inner conductor, and a core shielding layer is disposed on the surface of the composite insulation layer. A cabling wrapping is disposed between the surfaces of the inner conductors, and a double-layer sheath is disposed on the surface of the cabling wrapping, with filler material disposed inside. The composite insulation layer includes an inner insulation layer disposed on the surface of the inner conductors, and an intermediate insulation layer is disposed on the surface of the inner insulation layer. By setting the composite insulation layer and employing a multi-layer composite structure, a multi-layer radiation-resistant protection system is formed, effectively resisting high-dose radiation, greatly extending the cable's service life in radiation environments, and ensuring stable and reliable operation of the coaxial cable body in strong radiation environments such as nuclear power plants and space.

Description

Miniaturized radiation-resistant anti-interference coaxial cable

Technical Field

The utility model relates to the technical field of coaxial cables, in particular to a miniaturized radiation-resistant anti-interference coaxial cable.

Background

Coaxial cable is a wire and signal transmission line, and is useful for the transmission of analog and digital signals, and is suitable for a wide variety of applications, the most important of which is cable television transmission, long distance telephone transmission, short distance connections between computer systems, and local area networks.

Along with the continuous development of science and technology, in some special environments, such as fields of nuclear power stations, space exploration, medical radiation equipment and the like, extremely high requirements are put forward on the performance of coaxial cables, the conventional coaxial cables have a plurality of defects in miniaturization, radiation resistance and interference resistance, the conventional coaxial cables have a large size and are difficult to meet the development trend of miniaturization and light weight of equipment in order to ensure certain mechanical strength and electrical performance, and in the aspect of radiation resistance, common cable insulating materials are easy to be affected by radiation to age and have reduced performance, so that the service life of the cables is shortened, even electrical faults occur, meanwhile, interference signals in complex electromagnetic environments easily influence the signal transmission quality of the coaxial cables, and the accuracy and stability of data transmission are reduced.

For this purpose, miniaturized radiation-resistant anti-interference coaxial cables are proposed.

Disclosure of utility model

The utility model aims to provide a miniaturized radiation-resistant anti-interference coaxial cable, which can solve the problems that the conventional coaxial cable has a plurality of defects in miniaturization, radiation resistance and anti-interference, the conventional coaxial cable has large size and is difficult to meet the development trend of miniaturization and light weight of equipment in order to ensure certain mechanical strength and electrical performance, and in the aspect of radiation resistance, the common cable insulating material is easy to be aged and has reduced performance due to the influence of radiation, so that the service life of the cable is shortened, even electrical faults occur, meanwhile, the signal transmission quality of the coaxial cable is easy to be influenced by interference signals in a complex electromagnetic environment, and the accuracy and stability of data transmission are reduced.

The technical scheme includes that the miniaturized radiation-resistant anti-interference coaxial cable comprises a coaxial cable main body, wherein the coaxial cable main body comprises a plurality of inner conductors, a composite insulating layer is arranged on the surfaces of the inner conductors, a wire core shielding layer is arranged on the surfaces of the composite insulating layer, a cable wrapping belt is arranged between the surfaces of the plurality of inner conductors, a double-layer sheath layer is arranged on the surfaces of the cable wrapping belt, and filling is arranged inside the cable wrapping belt;

The composite insulating layer comprises an inner insulating layer, the inner insulating layer is arranged on the surface of the inner conductor, an intermediate insulating layer is arranged on the surface of the inner insulating layer, and an outer insulating layer is arranged on the surface of the intermediate insulating layer;

The double-layer sheath layer comprises a flame-retardant sheath layer, wherein the flame-retardant sheath layer is arranged on the surface of the cable wrapping tape, and a metal sheath layer is arranged on the surface of the flame-retardant sheath layer.

Preferably, the flame-retardant sheath layer is made of halogen-free flame-retardant cross-linked polyolefin material and is extruded on the surface of the cable-forming wrapping tape.

Preferably, the metal sheath layer is formed by a stainless steel woven sheath.

Preferably, the inner insulating layer is made of a radiation-resistant polyimide film and is tightly wrapped on the surface of the inner conductor.

Preferably, the middle insulating layer is made of foamed polyethylene material and is extruded on the surface of the inner insulating layer.

Preferably, the outer insulating layer is made of fluoroplastic material and is extruded on the surface of the middle insulating layer.

Preferably, the wire core shielding layer is made of nickel-iron alloy strips, is tightly wound on the surface of the composite insulating layer in a spiral shape, and is wrapped at an angle of 45-60 degrees.

Preferably, the inner conductor is made of high-purity oxygen-free copper alloy and is formed by twisting a plurality of filaments, and the surface of each filament is plated with silver.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the application, the composite insulating layer is arranged, and a multi-layer radiation-resistant protection system is formed by adopting a multi-layer composite structure, so that high-dose radiation can be effectively resisted, the service life of the cable in a radiation environment is greatly prolonged, and the coaxial cable main body is ensured to stably and reliably operate in strong radiation environments such as a nuclear power station, space and the like;

2. the application adopts a double-layer sheath layer and a double-layer sheath structure design, which complement each other, can achieve good flame retardant level, oil resistance, salt resistance and radiation resistance, can play a role of shielding magnetic fields to a certain extent, is flexible and flexible, can meet actual engineering requirements, and can meet the requirements of 6 times of cable diameter in comparison with the existing corrugated copper sheath or longitudinally-wrapped steel belt structure in miniaturized coaxial cable application, and the maximum outer diameter is far beyond the maximum outer diameter.

Drawings

Fig. 1 is an overall block diagram of a miniaturized radiation-resistant anti-interference coaxial cable of the present utility model;

fig. 2 is a schematic cross-sectional view of a coaxial cable body of the present utility model;

FIG. 3 is a schematic illustration of the connection of the composite insulation layer and the inner conductor of the present utility model;

fig. 4 is a schematic cross-sectional view of a dual jacket layer of the present utility model.

In the figure, 1, a coaxial cable main body, 2, an inner conductor, 3, a composite insulating layer, 31, an inner insulating layer, 32, an intermediate insulating layer, 33, an outer insulating layer, 4, a wire core shielding layer, 5, a cabling tape, 6, a double-layer sheath layer, 61, a flame-retardant sheath layer, 62 and a metal sheath layer.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides the following technical solutions:

The miniaturized radiation-resistant anti-interference coaxial cable comprises a coaxial cable main body 1, wherein the coaxial cable main body 1 comprises a plurality of inner conductors 2, the surfaces of the inner conductors 2 are provided with composite insulating layers 3, the surfaces of the composite insulating layers 3 are provided with wire core shielding layers 4, a cabling tape 5 is arranged between the surfaces of the plurality of inner conductors 2, the surfaces of the cabling tape 5 are provided with double-layer sheath layers 6, and the interiors of the cabling tape 5 are provided with filling materials;

The composite insulating layer 3 includes an interlayer insulating layer 31, and the interlayer insulating layer 31 is provided on the surface of the inner conductor 2, the surface of the interlayer insulating layer 31 is provided with an intermediate insulating layer 32, and the surface of the intermediate insulating layer 32 is provided with an outer insulating layer 33;

The double-layer sheath layer 6 comprises a flame-retardant sheath layer 61, the flame-retardant sheath layer 61 is arranged on the surface of the cable wrapping tape 5, and a metal sheath layer 62 is arranged on the surface of the flame-retardant sheath layer 61.

In the embodiment, the inner insulating layer 31 of the innermost layer is tightly wrapped on the inner conductor 2 through the composite insulating layer 3, so that the damage of radiation to the cable inner structure can be effectively resisted, the good electric insulating property of the cable inner structure can ensure the stability of signal transmission, the middle insulating layer 32 reduces the weight and the dielectric constant of the composite insulating layer 3 while ensuring the insulating property, the rapid signal transmission is facilitated, the outer diameter of the cable is further reduced, the inner insulating layer can be protected from being corroded by the external environment by being matched with the outer insulating layer 33, the weather resistance of the cable is enhanced, the double-layer sheath layer 6 is formed by the flame-retardant sheath layer 61 and the metal sheath layer 62, the double-layer sheath structure complements each other, the good flame-retardant grade, oil resistance, salt resistance and radiation resistance can be achieved, and a reference test can be designed, the metal sheath layer 62 can also play a role of shielding a certain magnetic field, and the whole cable is soft and easy to bend, and the actual engineering requirements can be met.

Specifically, as shown in fig. 4, the flame retardant sheath layer 61 is made of halogen-free flame retardant cross-linked polyolefin material, and is extruded on the surface of the cable wrapping tape 5.

Specifically, as shown in fig. 4, the metal sheath layer 62 is formed of a stainless steel braid sheath.

In the embodiment, the halogen-free flame-retardant crosslinked polyolefin material is used as the flame-retardant sheath layer 61, the stainless steel braided sheath is used as the metal sheath layer 62, the halogen-free flame-retardant crosslinked polyolefin material and the stainless steel braided sheath complement each other, so that good flame retardant level, oil resistance, salt resistance and radiation resistance can be achieved, a design benchmark test can be passed, the metal sheath layer 62 can play a role of shielding a certain magnetic field, and the whole cable is soft and flexible and can meet actual engineering requirements.

Specifically, as shown in fig. 3, the interlayer insulating layer 31 is made of a radiation-resistant polyimide film, and is tightly wrapped around the surface of the inner conductor 2.

Specifically, as shown in fig. 3, the middle insulating layer 32 is made of foamed polyethylene material, and is extruded on the surface of the inner insulating layer 31.

Specifically, as shown in fig. 3, the outer insulating layer 33 is made of a fluoroplastic material, and is extruded on the surface of the intermediate insulating layer 32.

In the embodiment, the composite insulating layer 3 adopts a multi-layer composite structure, the innermost layer is an inner insulating layer 31 formed by a radiation-resistant polyimide film, polyimide has excellent radiation resistance, can effectively resist damage to the internal structure of the cable by radiation, and has good electrical insulation performance to ensure the stability of signal transmission, the middle insulating layer 32 is a foamed polyethylene insulating material, and a porous structure is formed by a foaming process, so that the weight and dielectric constant of the composite insulating layer 3 are reduced while the insulation performance is ensured, the rapid signal transmission is facilitated, the outer diameter of the cable is further reduced, the outermost layer is covered with an outer insulating layer 33 formed by an ultrathin fluoroplastic layer, and the fluoroplastic has good chemical stability, wear resistance and low friction coefficient, can protect the inner insulating layer from being corroded by external environment, and can enhance the weather resistance of the cable.

Specifically, as shown in fig. 2, the core shielding layer 4 is made of a nickel-iron alloy tape, and is tightly wound on the surface of the composite insulating layer 3 in a spiral shape, and is wrapped at a winding angle of 45 degrees to 60 degrees.

Specifically, as shown in fig. 2, the inner conductor 2 is made of high-purity oxygen-free copper alloy, and is formed by twisting a plurality of filaments, and the surface of each filament is silver-plated.

In the embodiment, the cable core shielding layer 4 is made of a nickel-iron alloy belt, so that interference signals in a complex electromagnetic environment can be resisted, the anti-interference capability of the cable is obviously improved, the accuracy and stability of signal transmission are guaranteed, the high-purity oxygen-free copper alloy is adopted as the inner conductor 2, the mechanical strength is improved on the basis of ensuring good conductivity, the inner conductor 2 is designed into a multi-strand filament stranded structure, the surface of each strand of filament is plated with silver, the conductivity is enhanced, the oxidation resistance and the corrosion resistance are improved, the diameter of the filament is controlled in a very fine range, the whole diameter of the inner conductor 2 is reduced, meanwhile, the softness and the flexibility of the cable are ensured, the wiring in a narrow space is facilitated, and compared with the traditional thicker single-strand or few-strand conductors, the whole size of the cable is obviously reduced.

The coaxial cable comprises a coaxial cable main body 1, an inner insulating layer 31, an inner conductor 2, a cable inner structure, a cable core shielding layer 4, a cable outer diameter, a cable inner insulating layer, a cable outer diameter, a cable core shielding layer and a cable core shielding layer 4, wherein the inner insulating layer 31 is tightly wrapped by the inner insulating layer 31 of the innermost layer when the coaxial cable main body 1 is in use, the damage of radiation to the cable inner structure can be effectively resisted, the good electric insulating performance can ensure the stability of signal transmission, the weight and the dielectric constant of the composite insulating layer 3 are reduced while the insulating performance is ensured, the cable outer diameter is further reduced, the inner insulating layer can be protected from being corroded by the external environment by the outer insulating layer 33, the weather resistance of the cable is enhanced, the double-layer sheath layer 6 is formed by a flame-retardant sheath layer 61 and a metal sheath layer 62, the double-layer sheath structure complements each other, the good flame retardant grade, oil resistance, salt resistance and radiation resistance can be realized, a certain shielding magnetic field effect can be realized through a design reference test, the whole cable is flexible and easy bending, the cable can meet the actual engineering requirements, the cable core shielding layer 4 can resist interference signals in the complex electromagnetic environment, the signal can be obviously improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A miniaturized radiation-resistant and interference-resistant coaxial cable, comprising a coaxial cable body (1), characterized in that: the coaxial cable body (1) comprises a plurality of inner conductors (2), the surface of the inner conductors (2) is provided with a composite insulation layer (3), and the surface of the composite insulation layer (3) is provided with a core shielding layer (4), a cabling wrapping tape (5) is provided between the surfaces of the plurality of inner conductors (2), the surface of the cabling wrapping tape (5) is provided with a double sheath layer (6), and the interior of the cabling wrapping tape (5) is provided with filler;

The composite insulating layer (3) includes an inner insulating layer (31), and the inner insulating layer (31) is disposed on the surface of the inner conductor (2). An intermediate insulating layer (32) is disposed on the surface of the inner insulating layer (31), and an outer insulating layer (33) is disposed on the surface of the intermediate insulating layer (32).

The double-layer sheath layer (6) includes a flame-retardant sheath layer (61), which is disposed on the surface of the cable wrapping tape (5), and a metal sheath layer (62) is disposed on the surface of the flame-retardant sheath layer (61).

2. The miniaturized radiation-resistant and interference-resistant coaxial cable according to claim 1, characterized in that: the flame-retardant sheath layer (61) is made of halogen-free flame-retardant cross-linked polyolefin material and is extruded on the surface of the cable wrapping tape (5).

3. The miniaturized radiation-resistant and interference-resistant coaxial cable according to claim 1, characterized in that: the metal sheath layer (62) is composed of a stainless steel braided sheath.

4. The miniaturized radiation-resistant and interference-resistant coaxial cable according to claim 1, characterized in that: the inner insulation layer (31) is composed of a radiation-resistant polyimide film and is tightly wrapped around the surface of the inner conductor (2).

5. The miniaturized radiation-resistant and interference-resistant coaxial cable according to claim 1, characterized in that: the intermediate insulation layer (32) is made of foamed polyethylene material and is extruded on the surface of the inner insulation layer (31).

6. The miniaturized radiation-resistant and interference-resistant coaxial cable according to claim 1, characterized in that: the outer insulation layer (33) is made of fluoroplastic material and is extruded on the surface of the intermediate insulation layer (32).

7. The miniaturized radiation-resistant and interference-resistant coaxial cable according to claim 1, characterized in that: the core shielding layer (4) is composed of nickel-iron alloy strip, and is tightly wound in a spiral shape on the surface of the composite insulation layer (3), and is wrapped at a winding angle of 45 degrees to 60 degrees.

8. The miniaturized radiation-resistant and interference-resistant coaxial cable according to claim 1, characterized in that: the inner conductor (2) is made of high-purity oxygen-free copper alloy, which is made of multiple strands of fine wires twisted together, and each strand of fine wire is silver-plated.