Safety level coaxial cable

Abstract

The utility model discloses a safe level coaxial cable, include: silver plated copper conductor and coaxial setting in succession in the insulating layer, sheath layer of silver plated copper conductor outside, first isolation layer and second isolation layer between setting have first braided shield layer, second braided shield layer in proper order, first braided shield layer and second braided shield layer between, second braided shield layer and second isolation layer between respectively setting have first armoring layer, second armoring layer, the insulating layer is by the first insulating layer of compactly covering in the conductor outside and the second insulating layer of covering in the first insulating layer outside constitute, first insulating layer and the second insulating layer between setting have a plurality of metal wires along the circumferential arrangement, every metal wire all embeds its two sides first insulating layer, second insulating layer in. The utility model can reduce the electromagnetic interference of outside, can improve the overall structural strength while guaranteeing the bending performance, guarantees the stability in the long -term use process.

Description

Technical Field

[0001] This utility model relates to a safety-grade coaxial cable, belonging to the field of nuclear power plant detection technology. Background Technology

[0002] Electrical equipment cables used in nuclear power plants are mainly distributed in the nuclear island and conventional island, used for power transmission, control, and instrumentation connections. The types of cables required for nuclear power plants are basically the same as those for thermal power plants, but nuclear power plant cables have extremely stringent requirements for technical performance such as halogen-free, low-smoke, and low-toxicity. Preventing signal interference in the actual working environment has always been a difficult problem for traditional nuclear power plant cables. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a safety-grade coaxial cable that can reduce external electromagnetic interference, prevent signal leakage, maintain signal integrity and accuracy, and improve overall structural strength while ensuring bending performance, thus ensuring stability during long-term use.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a safety-grade coaxial cable, comprising: a silver-plated copper conductor and an insulation layer and a sheath layer coaxially disposed on the outside of the silver-plated copper conductor; a first isolation layer and a second isolation layer are respectively disposed between the insulation layer and the sheath layer covering the outside of the silver-plated copper conductor; a first braided shielding layer and a second braided shielding layer are respectively disposed between the first braided shielding layer and the second braided shielding layer, and between the second braided shielding layer and the second isolation layer; the insulation layer is composed of a first insulation layer tightly covering the outside of the conductor and a second insulation layer covering the outside of the first insulation layer; a plurality of metal wires arranged circumferentially are disposed between the first insulation layer and the second insulation layer, and each metal wire is embedded in the first insulation layer and the second insulation layer on both sides thereof.

[0005] The following are further improvements to the above technical solution:

[0006] 1. In the above scheme, the first insulating layer is an irradiated cross-linked polyethylene insulating layer, and the second insulating layer is an irradiated cross-linked polyolefin sheath layer.

[0007] 2. In the above scheme, the metal wire is a stainless steel stranded wire formed by twisting together several stainless steel wires.

[0008] 3. In the above scheme, both the first isolation layer and the second isolation layer are formed by wrapping and covering with polyimide tape.

[0009] 4. In the above scheme, both the first braided shielding layer and the second braided shielding layer are braided from silver-plated copper wires with a diameter of 0.16 mm to 0.20 mm.

[0010] 5. In the above scheme, both the first armor layer and the second armor layer are formed by wrapping soft magnetic nickel-based alloy strips.

[0011] 6. In the above scheme, the silver-plated copper conductor is made of several silver-plated copper wires twisted together.

[0012] 7. In the above scheme, the insulating layer is an irradiated cross-linked polyethylene insulating layer.

[0013] 8. In the above scheme, the sheath layer is an irradiated cross-linked polyolefin sheath layer.

[0014] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0015] This utility model relates to a safety-grade coaxial cable. Between the insulation layer and the sheath layer covering the silver-plated copper conductor, a first isolation layer and a second isolation layer are sequentially arranged. Between the first and second isolation layers, a first braided shielding layer and a second braided shielding layer are sequentially arranged. Between the first and second braided shielding layers, and between the second braided shielding layer and the second isolation layer, a first armor layer and a second armor layer are respectively arranged. The insulation layer consists of a first insulation layer tightly covering the conductor and a second insulation layer covering the outside of the first insulation layer. Several circumferentially arranged metal wires are arranged between the first and second insulation layers. Each metal wire is embedded within the first and second insulation layers on both sides. This design reduces external electromagnetic interference, prevents signal leakage, maintains signal integrity and accuracy, and improves overall structural strength while ensuring bending performance, thus guaranteeing stability during long-term use. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the structure of the safety-grade coaxial cable of this utility model;

[0017] Appendix Figure 2 This is an enlarged schematic diagram of the insulation layer in the safety-grade coaxial cable of this utility model.

[0018] In the above figures: 1. Silver-plated copper conductor; 2. Insulation layer; 21. First insulation layer; 22. Second insulation layer; 3. First isolation layer; 4. First braided shielding layer; 5. First armor layer; 6. Second braided shielding layer; 7. Second armor layer; 8. Second isolation layer; 9. Sheath layer; 10. Metal wire. Detailed Implementation

[0019] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0020] Example 1: A safety-grade coaxial cable includes: a silver-plated copper conductor 1 and an insulation layer 2 and a sheath layer 9 coaxially disposed on the outside of the silver-plated copper conductor 1. A first isolation layer 3 and a second isolation layer 8 are disposed sequentially between the insulation layer 2 and the sheath layer 9 covering the outside of the silver-plated copper conductor 1. A first braided shielding layer 4 and a second braided shielding layer 6 are disposed sequentially between the first isolation layer 3 and the second isolation layer 8. A first armor layer 5 and a second armor layer 7 are disposed between the first braided shielding layer 4 and the second braided shielding layer 6, and between the second braided shielding layer 6 and the second isolation layer 8, respectively. The insulation layer 2 is composed of a first insulation layer 21 tightly covering the outside of the conductor 1 and a second insulation layer 22 covering the outside of the first insulation layer 21. A plurality of metal wires 10 arranged circumferentially are disposed between the first insulation layer 21 and the second insulation layer 22. Each metal wire 10 is embedded in the first insulation layer 21 and the second insulation layer 22 on both sides thereof.

[0021] The first insulation layer 21 is an irradiated cross-linked polyethylene insulation layer, and the second insulation layer 22 is an irradiated cross-linked polyolefin sheath layer; the metal wire 10 is a stainless steel stranded wire formed by twisting together several stainless steel wires.

[0022] The first isolation layer 3 and the second isolation layer 8 are both formed by polyimide tape overlapping and wrapping; the first braided shielding layer 4 and the second braided shielding layer 6 are both woven from silver-plated copper wire with a diameter of 0.18 mm.

[0023] Example 2: A safety-grade coaxial cable includes: a silver-plated copper conductor 1 and an insulation layer 2 and a sheath layer 9 coaxially disposed on the outside of the silver-plated copper conductor 1. A first isolation layer 3 and a second isolation layer 8 are disposed sequentially between the insulation layer 2 and the sheath layer 9 covering the outside of the silver-plated copper conductor 1. A first braided shielding layer 4 and a second braided shielding layer 6 are disposed sequentially between the first isolation layer 3 and the second isolation layer 8. A first armor layer 5 and a second armor layer 7 are disposed between the first braided shielding layer 4 and the second braided shielding layer 6, and between the second braided shielding layer 6 and the second isolation layer 8, respectively. The insulation layer 2 is composed of a first insulation layer 21 tightly covering the outside of the conductor 1 and a second insulation layer 22 covering the outside of the first insulation layer 21. A plurality of metal wires 10 arranged circumferentially are disposed between the first insulation layer 21 and the second insulation layer 22. Each metal wire 10 is embedded in the first insulation layer 21 and the second insulation layer 22 on both sides thereof.

[0024] The first braided shielding layer 4 and the second braided shielding layer 6 are both braided from silver-plated copper wire with a diameter of 0.19 mm; the first armor layer 5 and the second armor layer 7 are both formed by wrapping soft magnetic nickel-based alloy strips.

[0025] The silver-plated copper conductor 1 is made of several silver-plated copper wires twisted together; the insulation layer 2 is an irradiated cross-linked polyethylene insulation layer; and the sheath layer 9 is an irradiated cross-linked polyolefin sheath layer.

[0026] Using the aforementioned safety-grade coaxial cable can reduce external electromagnetic interference, prevent signal leakage, maintain signal integrity and accuracy, and improve overall structural strength while ensuring bending performance, thus guaranteeing stability during long-term use.

[0027] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A safety-grade coaxial cable, comprising: A silver-plated copper conductor (1) and an insulating layer (2) and a sheath layer (9) are coaxially disposed on the outside of the silver-plated copper conductor (1). The characteristic feature is that a first isolation layer (3) and a second isolation layer (8) are sequentially disposed between the insulating layer (2) and the sheath layer (9) covering the outside of the silver-plated copper conductor (1). A first braided shielding layer (4) and a second braided shielding layer (6) are sequentially disposed between the first isolation layer (3) and the second isolation layer (8). The first braided shielding layer (4) and the second braided shielding layer (6) are separated by the second braided shielding layer. A first armor layer (5) and a second armor layer (7) are respectively provided between the shielding layer (6) and the second isolation layer (8). The insulating layer (2) is composed of a first insulating layer (21) tightly covering the outside of the conductor (1) and a second insulating layer (22) covering the outside of the first insulating layer (21). A plurality of metal wires (10) arranged in a circumferential direction are provided between the first insulating layer (21) and the second insulating layer (22). Each metal wire (10) is embedded in the first insulating layer (21) and the second insulating layer (22) on both sides.

2. The safety-grade coaxial cable according to claim 1, characterized in that: The first insulating layer (21) is an irradiated cross-linked polyethylene insulating layer, and the second insulating layer (22) is an irradiated cross-linked polyolefin sheath layer.

3. The safety-grade coaxial cable according to claim 1, characterized in that: The metal wire (10) is a stainless steel stranded wire formed by twisting together several stainless steel wires.

4. The safety-grade coaxial cable according to claim 1, characterized in that: Both the first isolation layer (3) and the second isolation layer (8) are formed by wrapping and covering with polyimide tape.

5. The safety-grade coaxial cable according to claim 1, characterized in that: Both the first braided shielding layer (4) and the second braided shielding layer (6) are made of silver-plated copper wire with a diameter of 0.16 mm to 0.20 mm.

6. The safety-grade coaxial cable according to claim 1, characterized in that: Both the first armor layer (5) and the second armor layer (7) are formed by wrapping soft magnetic nickel-based alloy strips.

7. The safety-grade coaxial cable according to claim 1, characterized in that: The silver-plated copper conductor (1) is made of several silver-plated copper wires twisted together.

8. The safety-grade coaxial cable according to claim 1, characterized in that: The insulating layer (2) is an irradiated cross-linked polyethylene insulating layer.

9. The safety-grade coaxial cable according to claim 1, characterized in that: The sheath layer (9) is an irradiated cross-linked polyolefin sheath layer.

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