Easily-radiating composite cable for nuclear power station

Abstract

The utility model discloses a nuclear power station composite cable easy to dissipate heat, which comprises a cable body, a cable buckle is arranged inside the cable body, a support plate is fixedly connected outside the cable buckle, an outer insulator is clamped outside the cable buckle, an inner insulator is fixedly connected inside the outer insulator, and the support plate is fixedly connected with the inner insulator. A copper core is fixedly connected to the interior of the inner insulation layer, a filling layer is fixedly connected to the exterior of the supporting plate, a flame-retardant belt is fixedly connected to the exterior of the filling layer, a protective belt is fixedly connected to the exterior of the flame-retardant belt, and an outer sheath is fixedly connected to the exterior of the protective belt. Through the structure, the heat dissipation condition of the cable can be better, the cable is more suitable for a nuclear power station, and the flame-retardant layer is arranged, so that longer operation time can be provided for emergency operators after detonation occurs due to the fact that the temperature in the cable is too high, and further accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of composite cables, in particular to a composite cable for nuclear power plants which is easy to dissipate heat. Background Art

[0002] The composite cables used in nuclear power plants are designed specifically for this specialized environment and meet stringent safety and reliability requirements. The following are some of the characteristics and requirements for composite cables used in nuclear power plants: Material Selection: Composite cables typically utilize silicone rubber or silicone composites as the core protective material, which exhibits excellent resistance to high temperatures, aging, and radiation. Silicone rubber maintains excellent electrical and mechanical properties even in the extreme environments found in nuclear power plants. Structural Design: The cables have a complex structure and may include multiple layers of protection, such as polyester tape, copper tape filling, and a glass fiber inner sheath, to enhance the cable's mechanical strength and fire resistance. Halogen-free flame-retardant materials are also used to enhance safety and reduce fire risks. Heat Resistance and Stability: Given the high temperatures encountered within nuclear power plants, cables must exhibit excellent heat resistance, using polymers with sufficient heat resistance for insulation and sheathing to ensure long-term, stable operation. Moisture Resistance and Chemical Stability: Cable design must consider moisture resistance and chemical stability requirements to accommodate the potentially humid and corrosive environments found within nuclear power plants. Radiation resistance: Cables near nuclear reactors must be able to withstand certain levels of radiation without compromising performance, which means that both material selection and structural design must consider radiation resistance requirements. In short, nuclear power plant composite cables are carefully designed based on the unique operating environment and safety standards of nuclear power plants, ensuring safe and reliable transmission of power and signals even under extreme conditions.

[0003] In the prior art, since the exterior of composite cables is usually covered with multiple protective layers, the heat dissipation performance of the composite cables is not very good. Cables used in nuclear power plants have a large amount of overcurrent per unit time, so the temperature of their copper wires is higher than that of cables for other purposes for a certain period of time. However, the heat dissipation performance of some cables is not good. In order to prevent major accidents caused by high-temperature combustion, they cannot be used in nuclear power plants for a long time. The external protective layer of some composite cables is not provided with a flame retardant layer, so that there is no flame retardant buffer time when the cable internal combustion occurs, so that the staff does not have more time to perform power-off operations, which leads to accidents. Utility Model Content

[0004] The purpose of the utility model is to provide a composite cable for nuclear power plants that is easy to dissipate heat, which can improve the heat dissipation of the cable itself and is more suitable for nuclear power plants. It is provided with a flame retardant layer, which can give emergency operators longer operating time after the internal temperature of the cable is too high and an explosion occurs, thereby avoiding further accidents.

[0005] To achieve the above-mentioned objectives, a composite cable for nuclear power plants that is easy to dissipate heat is provided, comprising a cable body, a cable clamp is provided inside the cable body, the outside of the cable clamp is fixedly connected to a support plate, the outside of the cable clamp is clamped to an outer insulation, the inside of the outer insulation is fixedly connected to an inner insulation, the inside of the inner insulation is fixedly connected to a copper core, the outside of the support plate is fixedly connected to a filling layer, the outside of the filling layer is fixedly connected to a flame retardant tape, the outside of the flame retardant tape is fixedly connected to a protective tape, and the outside of the protective tape is fixedly connected to an outer sheath.

[0006] According to the composite cable for nuclear power plants that is easy to dissipate heat, a gap layer is provided inside the cable buckle, and a card slot is provided outside the cable buckle.

[0007] According to the composite cable for nuclear power plants that is easy to dissipate heat, a first plate is provided in front of the protective belt, a first opening is provided above the first plate, a mesh is fixedly connected to the rear of the first plate, a second plate is fixedly connected to the rear of the mesh, a second opening is provided above the second plate, and the first opening corresponds to the second opening.

[0008] According to the composite cable for nuclear power plants that is easy to dissipate heat, the cable buckle is made of silicone, and the support plate is made of silicone.

[0009] According to the composite cable for nuclear power plants that is easy to dissipate heat, the material of the inner insulation is cross-linked polyethylene, and the material of the outer insulation is cross-linked polyolefin.

[0010] According to the composite cable for nuclear power plants that is easy to dissipate heat, the filling layer is made of graphite, and the flame retardant tape is made of polyvinyl chloride.

[0011] According to the composite cable for nuclear power plants that is easy to dissipate heat, the first plate body is made of galvanized stainless steel, the mesh body is made of galvanized stainless steel, and the second plate body is made of galvanized stainless steel.

[0012] According to the composite cable for nuclear power plants that is easy to dissipate heat, the outer sheath is made of polyolefin.

[0013] The utility model has the following beneficial effects:

[0014] 1. Compared with the existing technology, this composite cable for nuclear power plants that is easy to dissipate heat uses the structure of a composite protective belt to dissipate the heat inside the cable through the openings and the mesh body, so that the cable can be protected while better dissipating its own heat, allowing the cable to better perform power transmission work.

[0015] 2. Compared with the existing technology, the composite cable for nuclear power plants that is easy to dissipate heat is made of polyvinyl chloride through the flame retardant tape. Polyvinyl chloride has good mechanical properties, chemical corrosion resistance, self-extinguishing properties, insulation, and water resistance. As mentioned above, the polyvinyl chloride can better flame retard the cable. When the cable overheats, emergency personnel have more time to better carry out emergency repairs and avoid larger accidents.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a three-dimensional diagram of a composite cable for nuclear power plants that is easy to dissipate heat according to the utility model;

[0019] Figure 2 This is a three-dimensional diagram of a cable buckle of a composite cable for nuclear power plants that is easy to dissipate heat;

[0020] Figure 3 This is a three-dimensional diagram of a protective belt for a composite cable for nuclear power plants that is easy to dissipate heat according to the utility model;

[0021] Figure 4 This is an exploded and expanded diagram of a protective belt of a composite cable for nuclear power plants that is easy to dissipate heat.

[0022] Legend:

[0023] 1. Cable body; 2. Cable clip; 3. Support plate; 4. Copper core; 5. Inner insulation; 6. Outer insulation; 7. Filling layer; 8. Flame retardant tape; 9. Protective tape; 10. Outer sheath; 11. Gap layer; 12. Slot;

[0024] 91. First plate; 92. First opening; 93. Net; 94. Second plate; 95. Second opening. DETAILED DESCRIPTION

[0025] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0026] Reference Figure 1-4The embodiment of the utility model is a composite cable for nuclear power plants that is easy to dissipate heat, which includes a cable body 1, a cable clamp 2 is provided inside the cable body 1, a gap layer 11 is opened inside the cable clamp 2, a card slot 12 is opened outside the cable clamp 2, a support plate 3 is fixedly connected to the outside of the cable clamp 2, an outer insulation 6 is clamped on the outside of the cable clamp 2, an inner insulation 5 is fixedly connected to the inside of the outer insulation 6, a copper core 4 is fixedly connected to the inside of the inner insulation 5, a filling layer 7 is fixedly connected to the outside of the support plate 3, a flame retardant tape 8 is fixedly connected to the outside of the filling layer 7, a protective tape 9 is fixedly connected to the outside of the flame retardant tape 8, a first plate 91 is provided in front of the protective tape 9, and a first plate 91 is opened above the first plate 91. An opening 92, a mesh 93 is fixedly connected to the rear of the first plate 91, a second plate 94 is fixedly connected to the rear of the mesh 93, a second opening 95 is opened above the second plate 94, the first opening 92 corresponds to the second opening 95, the outside of the protective belt 9 is fixedly connected to the outer sheath 10, the cable clip 2 is made of silicone, the support plate 3 is made of silicone, the inner insulation 5 is made of cross-linked polyethylene, the outer insulation 6 is made of cross-linked polyolefin, the filling layer 7 is made of graphite, the flame retardant belt 8 is made of polyvinyl chloride, the first plate 91 is made of galvanized stainless steel, the mesh 93 is made of galvanized stainless steel, the second plate 94 is made of galvanized stainless steel, and the outer sheath 10 is made of polyolefin.

[0027] In the above structure, the cable clip 2 and support plate 3 are made of silicone. As a polymer material, silicone possesses numerous unique advantages, making it widely used in various fields. Its main advantages include high and low temperature resistance, weather and aging resistance, electrical insulation, biocompatibility, non-toxicity, waterproofness, moisture resistance, easy molding and coloring, good elasticity and resilience, and chemical stability. These characteristics make silicone suitable for use inside cables.

[0028] The material of the inner insulation 5 is cross-linked polyethylene. As an improved polyethylene material, cross-linked polyethylene has the following significant advantages: excellent electrical properties, enhanced heat resistance, increased service life, environmental protection characteristics, mechanical strength and flexibility, light weight, chemical corrosion resistance, simplified accessories, large transmission capacity, etc. Overall, cross-linked polyethylene cable has become an indispensable material in modern power transmission systems due to its excellent electrical and physical properties, especially in the fields of high voltage, large capacity and long-distance power transmission.

[0029] The material of the external insulation 6 is cross-linked polyolefin. Compared with ordinary polyolefin, the cross-linked polyolefin material has improved its performance through the cross-linking process, thereby showing a series of advantages, mainly including: improving mechanical properties, enhancing temperature resistance, optimizing electrical properties, improving chemical stability, improving dimensional stability, extending service life, broadening application areas, and environmental advantages. In summary, after cross-linking modification by chemical or physical methods, the physical, chemical and electrical properties of the cross-linked polyolefin are significantly enhanced, its application range is broadened, and the overall value and sustainability of the product are improved.

[0030] The material of the filling layer 7 is graphite. As an important non-metallic mineral material, graphite has the following significant advantages: high temperature resistance, chemical stability, corrosion resistance, machinability, light weight, antioxidant protection, environmental protection and sustainability. These advantages make graphite play a vital role in many industrial fields such as metallurgy, electronics, chemical industry, machinery, nuclear energy, aerospace, etc.

[0031] The flame retardant tape 8 is made of polyvinyl chloride. As a commonly used plastic material, polyvinyl chloride has the following advantages: cost-effectiveness, good mechanical properties, chemical corrosion resistance, self-extinguishing property, insulation, water resistance, easy processing, durability, and recyclability, making it more suitable as a flame retardant material.

[0032] The material of the first plate 91 is galvanized stainless steel. Galvanized stainless steel is a special treatment method. Although stainless steel itself has good corrosion resistance, in certain specific cases, galvanizing the stainless steel surface can bring the following potential advantages: enhanced local protection and increased durability. The above characteristics are used to enhance the durability of the stainless steel plate and increase the overall service life.

[0033] The outer sheath 10 is made of polyolefin. As an important polymer material, polyolefin has the following advantages: chemical corrosion resistance, water resistance, electrical insulation, good processability, non-toxicity and safety, recyclability, and weather resistance. According to its characteristics, it is more suitable as the outer sheath 10 of the cable.

[0034] By providing the gap layer 11, when the cable is curled and deformed, the cable clips 2 on both sides of the gap layer 11 move closer to the middle of the gap layer 11, so that the cable deformation is offset by its own deformation, preventing the cable clips 2 from affecting the internal copper core 4.

[0035] Working principle: When in use, the heat-dissipating composite cable for nuclear power plants is dissipated between the first opening 92 and the mesh body 93. Compared with the traditional all-inclusive protective shell, it has better heat dissipation performance. By providing a flame retardant belt 8, it can prevent the cable from instantaneously exploding.

[0036] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A composite cable for nuclear power plants that is easy to dissipate heat, characterized in that: The invention comprises a cable body (1), wherein a cable clip (2) is provided inside the cable body (1), the outside of the cable clip (2) is fixedly connected to a support plate (3), the outside of the cable clip (2) is clamped with an outer insulation (6), the inside of the outer insulation (6) is fixedly connected to an inner insulation (5), the inside of the inner insulation (5) is fixedly connected to a copper core (4), the outside of the support plate (3) is fixedly connected to a filling layer (7), the outside of the filling layer (7) is fixedly connected to a flame retardant tape (8), the outside of the flame retardant tape (8) is fixedly connected to a protective tape (9), and the outside of the protective tape (9) is fixedly connected to an outer sheath (10).

2. The composite cable for nuclear power plants with easy heat dissipation according to claim 1, characterized in that: A gap layer (11) is provided inside the cable buckle (2), and a clamping groove (12) is provided outside the cable buckle (2).

3. The composite cable for nuclear power plants with easy heat dissipation according to claim 1, characterized in that: A first plate (91) is provided in front of the protective belt (9), a first opening (92) is provided above the first plate (91), a net (93) is fixedly connected to the rear of the first plate (91), a second plate (94) is fixedly connected to the rear of the net (93), a second opening (95) is provided above the second plate (94), and the first opening (92) corresponds to the second opening (95).

4. The composite cable for nuclear power plants with easy heat dissipation according to claim 1, characterized in that: The cable clip (2) is made of silicone, and the support plate (3) is made of silicone.

5. The composite cable for nuclear power plants with easy heat dissipation according to claim 1, characterized in that: The material of the inner insulation (5) is cross-linked polyethylene, and the material of the outer insulation (6) is cross-linked polyolefin.

6. The composite cable for nuclear power plants with easy heat dissipation according to claim 1, characterized in that: The material of the filling layer (7) is graphite, and the material of the flame retardant belt (8) is polyvinyl chloride.

7. The composite cable for nuclear power plants with easy heat dissipation according to claim 3, characterized in that: The material of the first plate body (91) is galvanized stainless steel, the material of the mesh body (93) is galvanized stainless steel, and the material of the second plate body (94) is galvanized stainless steel.

8. The heat-dissipating composite cable for nuclear power plants according to claim 1, characterized in that: The material of the outer sheath (10) is polyolefin.

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