Miniaturized radiation-resistant anti-interference coaxial cable

Abstract

The utility model discloses a miniaturized radiation-resistant anti-interference coaxial cable, which belongs to the technical field of coaxial cables, and comprises a coaxial cable main body, the coaxial cable main body comprises a plurality of inner conductors, the surface of each inner conductor is provided with a composite insulating layer, and the surface of each composite insulating layer is provided with a wire core shielding layer. A cabling wrapping tape is arranged among the surfaces of the plurality of inner conductors, a double-layer sheath layer is arranged on the surface of the cabling wrapping tape, and a filler is arranged in the cabling wrapping tape; the composite insulating layer comprises an inner insulating layer, the inner insulating layer is arranged on the surface of the inner conductor, a middle insulating layer is arranged on the surface of the inner insulating layer, the composite insulating layer is arranged, a multi-layer composite structure is adopted to jointly form a multi-layer radiation-resistant protection system, high-dose radiation can be effectively resisted, and the service life of the cable is prolonged. The service life of the cable in a radiation environment is greatly prolonged, and stable and reliable operation of the coaxial cable main body in a nuclear power station, space and other intense radiation environments is ensured.

Description

Technical Field

[0001] This utility model relates to the field of coaxial cable technology, and in particular to miniaturized radiation-resistant and interference-resistant coaxial cable. Background Technology

[0002] Coaxial cable is a type of electrical wire and signal transmission line. It can be used to transmit analog and digital signals and is suitable for a wide variety of applications, the most important of which are cable television transmission, long-distance telephone transmission, short-distance connections between computer systems, and local area networks.

[0003] With the continuous development of science and technology, extremely high requirements are placed on the performance of coaxial cables in some special environments, such as nuclear power plants, space exploration, and medical radiation equipment. Existing coaxial cables have many shortcomings in terms of miniaturization, radiation resistance, and interference resistance. Traditional coaxial cables are relatively large in size to ensure certain mechanical strength and electrical performance, which makes it difficult to meet the development trend of miniaturization and lightweight equipment. In terms of radiation resistance, the insulation materials of ordinary cables are easily affected by radiation, resulting in aging and performance degradation, which leads to a shortened cable life and even electrical failures. At the same time, interference signals in complex electromagnetic environments can easily affect the signal transmission quality of coaxial cables, reducing the accuracy and stability of data transmission.

[0004] Therefore, a miniaturized, radiation-resistant, and interference-resistant coaxial cable is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a miniaturized, radiation-resistant, and interference-resistant coaxial cable, which can solve many shortcomings of existing coaxial cables in terms of miniaturization, radiation resistance, and interference resistance. Traditional coaxial cables are relatively large in size to ensure certain mechanical strength and electrical performance, making it difficult to meet the development trend of miniaturization and lightweight equipment. In terms of radiation resistance, the insulation material of ordinary cables is easily affected by radiation, resulting in aging and performance degradation, which leads to a shortened cable life and even electrical failures. At the same time, interference signals in complex electromagnetic environments can easily affect the signal transmission quality of coaxial cables, reducing the accuracy and stability of data transmission.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a miniaturized radiation-resistant and interference-resistant coaxial cable, comprising a coaxial cable body, the coaxial cable body comprising a plurality of inner conductors, the surface of the inner conductors being provided with a composite insulation layer, and the surface of the composite insulation layer being provided with a core shielding layer, a cabling wrapping tape being provided between the surfaces of the plurality of inner conductors, the surface of the cabling wrapping tape being provided with a double sheath layer, and the interior of the cabling wrapping tape being provided with filler;

[0007] The composite insulation layer includes an inner insulation layer disposed on the surface of the inner conductor, an intermediate insulation layer disposed on the surface of the inner insulation layer, and an outer insulation layer disposed on the surface of the intermediate insulation layer.

[0008] The double-layer sheath includes a flame-retardant sheath, which is disposed on the surface of the cable wrapping tape, and a metal sheath is disposed on the surface of the flame-retardant sheath.

[0009] Preferably, the flame-retardant sheath layer is made of halogen-free flame-retardant cross-linked polyolefin material and is extruded onto the surface of the cable wrapping tape.

[0010] Preferably, the metal sheath layer is composed of a stainless steel woven sheath.

[0011] Preferably, the inner insulating layer is composed of a radiation-resistant polyimide film and is tightly wrapped around the surface of the inner conductor.

[0012] Preferably, the intermediate insulating layer is made of foamed polyethylene material and is extruded onto the surface of the inner insulating layer.

[0013] Preferably, the outer insulating layer is made of fluoroplastic material and is extruded onto the surface of the intermediate insulating layer.

[0014] Preferably, the core shielding layer is made of nickel-iron alloy strip and is tightly wound in a spiral shape on the surface of the composite insulation layer, with a winding angle of 45 degrees to 60 degrees.

[0015] Preferably, the inner conductor is made of high-purity oxygen-free copper alloy, which is made of multiple strands of fine wire twisted together, and each strand of fine wire is silver-plated.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This application establishes a multi-layer radiation-resistant protection system by setting a composite insulation layer and adopting a multi-layer composite structure, which can effectively resist high-dose radiation, greatly extend the service life of the cable in the radiation environment, and ensure the stable and reliable operation of the coaxial cable body in strong radiation environments such as nuclear power plants and space.

[0018] 2. This application adopts a double-layer sheath design, which complements each other to achieve a good flame retardant rating, oil resistance, salt resistance, and radiation resistance. It can also shield magnetic fields to a certain extent. The entire cable is flexible and easy to bend, which can meet the actual engineering requirements. In the application of miniaturized coaxial cables, compared with the existing corrugated copper sheath or longitudinally wrapped steel strip structure, the bending radius of the cable cannot reach 6 times the cable diameter, and the maximum outer diameter is much larger. The double-layer sheath design can pass the design benchmark test. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the miniaturized radiation-resistant and interference-resistant coaxial cable of this utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the main body of the coaxial cable of this utility model;

[0021] Figure 3 This is a schematic diagram showing the connection between the composite insulation layer and the inner conductor of this utility model;

[0022] Figure 4 This is a cross-sectional schematic diagram of the double-layer sheath layer of this utility model.

[0023] In the diagram, 1 is the main body of the coaxial cable; 2 is the inner conductor; 3 is the composite insulation layer; 31 is the inner insulation layer; 32 is the intermediate insulation layer; 33 is the outer insulation layer; 4 is the core shielding layer; 5 is the cabling wrapping tape; 6 is the double sheath layer; 61 is the flame-retardant sheath layer; and 62 is the metal sheath layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 The present invention provides the following technical solution:

[0026] Miniaturized radiation-resistant and interference-resistant coaxial cable includes a coaxial cable body 1, the coaxial cable body 1 includes several 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 several 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;

[0027] The composite insulation layer 3 includes an inner insulation layer 31, which is disposed on the surface of the inner conductor 2. An intermediate insulation layer 32 is disposed on the surface of the inner insulation layer 31, and an outer insulation layer 33 is disposed on the surface of the intermediate insulation layer 32.

[0028] The double-layer sheath 6 includes a flame-retardant sheath 61, which is disposed on the surface of the cable wrapping tape 5, and a metal sheath 62 is disposed on the surface of the flame-retardant sheath 61.

[0029] In this embodiment: the composite insulation layer 3 adopts a multi-layer composite structure. The innermost inner insulation layer 31 tightly wraps the inner conductor 2, which can effectively resist the damage of radiation to the internal structure of the cable, and its good electrical insulation performance can ensure the stability of signal transmission. The middle insulation layer 32, while ensuring insulation performance, reduces the weight and dielectric constant of the composite insulation layer 3, which is conducive to the rapid transmission of signals and further reduces the outer diameter of the cable. Combined with the outer insulation layer 33, it can protect the inner insulation layer from external environmental corrosion and enhance the weather resistance of the cable. The double sheath layer 6 is composed of a flame-retardant sheath layer 61 and a metal sheath layer 62. This double sheath structure complements each other and can achieve a good flame retardant rating, oil resistance, salt resistance, and radiation resistance, and can pass the design benchmark test. In addition, the metal sheath layer 62 can also play a certain role in shielding magnetic fields, and the entire cable is flexible and easy to bend, which can meet the actual engineering requirements.

[0030] Specifically, such as Figure 4 As shown, the flame-retardant sheath layer 61 is made of halogen-free flame-retardant cross-linked polyolefin material and is extruded onto the surface of the cabling wrapping tape 5.

[0031] Specifically, such as Figure 4 As shown, the metal sheath layer 62 is composed of a stainless steel braided sheath.

[0032] In this embodiment, a halogen-free flame-retardant cross-linked polyolefin material is used as the flame-retardant sheath layer 61, and a stainless steel braided sheath is used as the metal sheath layer 62. The two complement each other and can achieve a good flame retardant rating, oil resistance, salt resistance, and radiation resistance, and can pass the design benchmark test. Furthermore, the metal sheath layer 62 can also play a certain role in shielding magnetic fields, and the entire cable is flexible and easy to bend, which can meet the actual engineering requirements.

[0033] Specifically, such as Figure 3 As shown, the inner insulating layer 31 is composed of a radiation-resistant polyimide film and is tightly wrapped around the surface of the inner conductor 2.

[0034] Specifically, such as Figure 3 As shown, the intermediate insulation layer 32 is made of foamed polyethylene material and is extruded onto the surface of the inner insulation layer 31.

[0035] Specifically, such as Figure 3 As shown, the outer insulating layer 33 is made of fluoroplastic material and is extruded onto the surface of the middle insulating layer 32.

[0036] In this embodiment: the composite insulation layer 3 adopts a multi-layer composite structure. The innermost layer is an inner insulation layer 31 composed of radiation-resistant polyimide film. Polyimide has excellent radiation resistance and can effectively resist radiation damage to the internal structure of the cable. Its good electrical insulation performance can ensure the stability of signal transmission. The middle insulation layer 32 is a foamed polyethylene insulation material. The foaming process forms a porous structure, which reduces the weight and dielectric constant of the composite insulation layer 3 while ensuring insulation performance. This is conducive to the rapid transmission of signals and further reduces the outer diameter of the cable. The outermost layer is covered with an ultra-thin outer insulation layer 33 composed of fluoroplastic. Fluoroplastics have good chemical stability, wear resistance and low coefficient of friction. They can protect the inner insulation layer from external environmental corrosion and enhance the weather resistance of the cable.

[0037] Specifically, such as Figure 2 As shown, the core shielding layer 4 is made of nickel-iron alloy strip and is tightly wound in a spiral shape on the surface of the composite insulation layer 3, with a winding angle of 45 degrees to 60 degrees.

[0038] Specifically, such as Figure 2 As shown, 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.

[0039] In this embodiment: the core shielding layer 4 is made of nickel-iron alloy strip, which can resist interference signals in complex electromagnetic environments, significantly improving the cable's anti-interference ability and ensuring the accuracy and stability of signal transmission; by using high-purity oxygen-free copper alloy as the inner conductor 2, mechanical strength is improved while ensuring good conductivity. The inner conductor 2 is designed as a multi-strand stranded structure, with each strand plated with silver, which enhances conductivity and improves oxidation and corrosion resistance. The diameter of the strands is controlled within an extremely fine range, reducing the overall diameter of the inner conductor 2 while ensuring that the cable is flexible and bendable, facilitating wiring in confined spaces. Compared with traditional thicker single-strand or few-strand conductors, the overall size of the cable is significantly reduced.

[0040] Working Principle: When the coaxial cable body 1 is used, the innermost inner insulation layer 31 tightly wraps the inner conductor 2, effectively resisting radiation damage to the internal structure of the cable. Its excellent electrical insulation performance ensures the stability of signal transmission. The middle insulation layer 32, while ensuring insulation performance, reduces the weight and dielectric constant of the composite insulation layer 3, which is conducive to rapid signal transmission and further reduces the outer diameter of the cable. Together with the outer insulation layer 33, it can protect the inner insulation layer from external environmental corrosion and enhance the weather resistance of the cable. The double sheath layer 6 is composed of a flame-retardant sheath layer 61 and a metal sheath layer 62. This double sheath structure complements each other and can achieve a good flame retardant rating, oil resistance, salt resistance, and radiation resistance, and can pass the design benchmark test. In addition, the metal sheath layer 62 can also play a certain role in shielding magnetic fields. The entire cable is flexible and easy to bend, which can meet the actual engineering requirements. The core shielding layer 4 can resist interference signals in complex electromagnetic environments, significantly improving the anti-interference ability of the cable and ensuring the accuracy and stability of signal transmission.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Miniaturized radiation resistant 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 conductor (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), the surfaces of the plurality of inner conductors (2) are provided with a cable lacing tape (5), the surface of the cable lacing tape (5) is provided with a double-layer sheath layer (6), and the inside of the cable lacing tape (5) is provided with a filler; The composite insulation layer (3) comprises an inner insulation layer (31), and the inner insulation layer (31) is arranged on the surface of the inner conductor (2); the surface of the inner insulation layer (31) is provided with an intermediate insulation layer (32), and the surface of the intermediate insulation layer (32) is provided with an outer insulation 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 lacing tape (5), and the surface of the flame-retardant sheath layer (61) is provided with a metal sheath layer (62).

2. The miniaturized radiation-hardened, jam-resistant coaxial cable of claim 1, wherein: The flame-retardant sheath layer (61) is composed of halogen-free flame-retardant crosslinked polyolefin material, and is extruded on the surface of the cable lacing tape (5).

3. The miniaturized radiation-hardened, jam-resistant coaxial cable of claim 1, wherein: The metal sheath layer (62) is composed of a stainless steel braided sheath.

4. The miniaturized radiation-hardened, jam-resistant coaxial cable of claim 1, wherein: The inner insulation layer (31) is composed of a radiation-resistant polyimide film, and is tightly wrapped on the surface of the inner conductor (2).

5. The miniaturized radiation-hardened, jam-resistant coaxial cable of claim 1, wherein: The intermediate insulation layer (32) is composed of foamed polyethylene material, and is extruded on the surface of the inner insulation layer (31).

6. The miniaturized radiation-hardened, jam-resistant coaxial cable of claim 1, wherein: The outer insulation layer (33) is composed of fluoroplastic material, and is extruded on the surface of the intermediate insulation layer (32).

7. The miniaturized radiation-hardened, jam-resistant coaxial cable of claim 1, wherein: The core shielding layer (4) is composed of a 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 45-60 degrees.

8. The miniaturized radiation-hardened, jam-resistant coaxial cable of claim 1, wherein: The inner conductor (2) is made of high-purity oxygen-free copper alloy, which is twisted from a plurality of fine wires, and each fine wire is provided with silver plating on the surface.

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