Safety level organic signal cable
By employing a multi-layer shielding structure in cables used in nuclear power plants, the problems of signal interference and durability of nuclear power plant cables have been solved, resulting in reduced electromagnetic interference and improved signal integrity and accuracy in the nuclear power plant environment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU HUAGUANG CABLE & ELECTRICAL APPLIANCE CO LTD
- Filing Date
- 2025-04-11
- Publication Date
- 2026-06-16
AI Technical Summary
Cables used in nuclear power plants present challenges in preventing signal interference and leakage, and conventional cables lack sufficient durability in the harsh environment of nuclear power plants.
The structure employs a multi-layer shielding structure, which includes multiple shielding layers between the insulation layer and the sheath layer on the outside of the silver-plated copper conductor. These layers consist of a first isolation layer, a braided shielding layer, and an armor layer. The staggered arrangement of these multiple shielding layers reduces electromagnetic interference and prevents signal leakage.
It enables the reduction of electromagnetic interference in nuclear power plant environments, prevention of signal leakage, improvement of cable durability, maintenance of signal transmission integrity and accuracy, and adaptation to installation in confined spaces.
Smart Images
Figure CN224366570U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a safety-grade organic signal cable, belonging to the field of radio frequency cable 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 organic signal cable that can reduce electromagnetic interference, prevent signal leakage, improve cable durability, and maintain the integrity and accuracy of signal transmission.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a safety-grade organic signal 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 disposed sequentially between the insulation layer and the sheath layer covering the outside of the silver-plated copper conductor; a first braided shielding layer, a second braided shielding layer and a third braided shielding layer are disposed sequentially between the first isolation layer and the second isolation layer; a first armor layer and a second armor layer are disposed between the first braided shielding layer and the second braided shielding layer, and between the second braided shielding layer and the third braided shielding layer; and a wrapping shielding layer is disposed between the third braided shielding layer and the second isolation layer.
[0005] The following are further improvements to the above technical solution:
[0006] 1. In the above scheme, both the first isolation layer and the second isolation layer are formed by polyimide tape overlapping and wrapping.
[0007] 2. In the above scheme, the wrapping overlap rate of the first isolation layer and the second isolation layer is not less than 25%.
[0008] 3. In the above scheme, the first isolation layer has 1 wrapping layer and the second isolation layer has 2 wrapping layers.
[0009] 4. In the above scheme, the first braided shielding layer, the second braided shielding layer and the third braided shielding layer are all braided from silver-plated copper wires with a diameter of 0.16 mm to 0.20 mm and the braiding density is not less than 90%.
[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 wrapping shielding layer is formed by wrapping with aluminum-plastic composite tape, and the number of wrapping layers is 2, with a wrapping overlap rate of not less than 25%.
[0012] 7. In the above scheme, the silver-plated copper conductor is made of several silver-plated copper wires twisted together.
[0013] 8. In the above scheme, the insulating layer is an irradiated cross-linked polyethylene insulating layer, and 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 organic signal 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, a second braided shielding layer, and a third braided shielding layer are sequentially arranged. Between the first and second braided shielding layers, and between the second and third braided shielding layers, a first armor layer and a second armor layer are respectively arranged. Between the third braided shielding layer and the second isolation layer, a wrapping shielding layer is arranged. Through this staggered arrangement of multiple layers of shielding, the cable not only maintains a small overall outer diameter and excellent bending performance to adapt to the harsh and confined installation environment of nuclear power plant sites, but also reduces electromagnetic interference, prevents signal leakage, improves cable durability, and maintains the integrity and accuracy of signal transmission. Attached Figure Description
[0016] Appendix Figure 1 This is a schematic diagram of the structure of the safety-grade organic signal cable of this utility model.
[0017] In the above figures: 1. Silver-plated copper conductor; 2. 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. Third braided shielding layer; 9. Wrapped shielding layer; 10. Second isolation layer; 11. Sheath layer. Detailed Implementation
[0018] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.
[0019] Example 1: A safety-grade organic signal cable, comprising: a silver-plated copper conductor 1 and an insulation layer 2 and a sheath layer 11 coaxially disposed on the outside of the silver-plated copper conductor 1. A first isolation layer 3 and a second isolation layer 10 are disposed sequentially between the insulation layer 2 and the sheath layer 11 covering the outside of the silver-plated copper conductor 1. A first braided shielding layer 4, a second braided shielding layer 6, and a third braided shielding layer 8 are disposed sequentially between the first isolation layer 3 and the second isolation layer 10. 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 third braided shielding layer 8, respectively. A wrapping shielding layer 9 is disposed between the third braided shielding layer 8 and the second isolation layer 10.
[0020] The first isolation layer 3 and the second isolation layer 10 are both formed by polyimide tape overlap wrapping; the overlap rate of the first isolation layer 3 and the second isolation layer 10 is not less than 25%; the first isolation layer 3 has 1 wrapping layer and the second isolation layer 10 has 2 wrapping layers.
[0021] The first braided shielding layer 4, the second braided shielding layer 6 and the third braided shielding layer 8 are all braided from silver-plated copper wire with a diameter of 0.17 mm and the braiding density is not less than 90%.
[0022] Example 2: A safety-grade organic signal cable, comprising: a silver-plated copper conductor 1 and an insulation layer 2 and a sheath layer 11 coaxially disposed on the outside of the silver-plated copper conductor 1; a first isolation layer 3 and a second isolation layer 10 are respectively disposed between the insulation layer 2 and the sheath layer 11 covering the outside of the silver-plated copper conductor 1; a first braided shielding layer 4, a second braided shielding layer 6 and a third braided shielding layer 8 are respectively 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 third braided shielding layer 8; and a wrapping shielding layer 9 is disposed between the third braided shielding layer 8 and the second isolation layer 10.
[0023] The first braided shielding layer 4, the second braided shielding layer 6, and the third braided shielding layer 8 are all braided from silver-plated copper wires with a diameter of 0.19 mm and a braiding density of not less than 90%.
[0024] The first armor layer 5 and the second armor layer 7 are both formed by wrapping soft magnetic nickel-based alloy strips; the wrapped shielding layer 9 is formed by wrapping aluminum-plastic composite strips, and the number of wrapping layers is 2, with a wrapping overlap rate of not less than 25%.
[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 11 is an irradiated cross-linked polyolefin sheath layer.
[0026] This invention is used to transmit extremely weak current signals or to provide DC high voltage to equipment. Its advantages are:
[0027] (1) It has good electrical performance and electromagnetic interference resistance.
[0028] (2) It has the characteristics of flame retardancy, low smoke, halogen-free and waterproof, and has excellent radiation resistance. It can be used in areas with strong radiation such as nuclear power plants and can withstand a cumulative radiation dose of 375kGy.
[0029] (3) The cable has a small overall outer diameter, excellent bending performance, and stable structure, making it easy to install and lay in the harsh and confined space of the nuclear power plant site.
[0030] (4) Minimum operating temperature of the cable: -30 to 90℃. Normal service life is 60 years.
[0031] (5) The outer protective layer has the characteristics of being resistant to pressure, tensile strength, corrosion and wear.
[0032] The aforementioned safety-grade organic signal cable, through its multi-layered shielding, reduces electromagnetic interference, prevents signal leakage, improves cable durability, and maintains signal integrity and accuracy.
[0033] 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 organic signal cable, comprising: A silver-plated copper conductor (1) and an insulating layer (2) and a sheath layer (11) are sequentially disposed on the outside of the silver-plated copper conductor (1). The characteristic is that: a first isolation layer (3) and a second isolation layer (10) are sequentially disposed between the insulating layer (2) and the sheath layer (11) covering the outside of the silver-plated copper conductor (1). A first braided shielding layer (4), a second braided shielding layer (6) and a third braided shielding layer (8) are sequentially 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 third braided shielding layer (8). A first armor layer (5) and a second armor layer (7) are respectively 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 third braided shielding layer (8). A wrapping shielding layer (9) is disposed between the third braided shielding layer (8) and the second isolation layer (10).
2. The security-grade organic signal cable according to claim 1, characterized in that: Both the first isolation layer (3) and the second isolation layer (10) are formed by wrapping and covering with polyimide tape.
3. The safety-grade organic signal cable according to claim 2, characterized in that: The wrapping overlap rate of the first isolation layer (3) and the second isolation layer (10) is not less than 25%.
4. The security-grade organic signal cable according to claim 2 or 3, characterized in that: The first isolation layer (3) has 1 wrapping layer, and the second isolation layer (10) has 2 wrapping layers.
5. The security-grade organic signal cable according to claim 1, characterized in that: The first braided shielding layer (4), the second braided shielding layer (6) and the third braided shielding layer (8) are all braided from silver-plated copper wires with a diameter of 0.16 mm to 0.20 mm and the braiding density is not less than 90%.
6. The security-grade organic signal 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 organic signal cable according to claim 1, characterized in that: The wrapping shielding layer (9) is formed by wrapping with aluminum-plastic composite tape, and the number of wrapping layers is 2, with a wrapping overlap rate of not less than 25%.
8. The safety-grade organic signal cable according to claim 1, characterized in that: The silver-plated copper conductor (1) is made of several silver-plated copper wires twisted together.
9. The safety-grade organic signal cable according to claim 1, characterized in that: The insulation layer (2) is an irradiated cross-linked polyethylene insulation layer, and the sheath layer (11) is an irradiated cross-linked polyolefin sheath layer.