IE-grade K3-class radiation-resistant power cable

Abstract

The utility model belongs to the technical field of power cables, and particularly relates to an IE-grade K3-class radiation-resistant power cable, which comprises a protective sleeve, ventilation and heat dissipation ports arranged at equal intervals are arranged on the outer surface of the protective sleeve, a connecting sleeve is arranged in the protective sleeve, a power cable is arranged on the inner wall of the connecting sleeve, and two groups of support rings are fixedly connected to the outer surface of the connecting sleeve. The side faces, close to each other, of each set of supporting rings are fixedly connected with supporting plates arranged at equal intervals, the side face, away from the connecting sleeve, of each supporting plate is fixedly connected with two sets of telescopic springs, and the ends, away from each other, of each set of telescopic springs are fixedly connected with connecting plates. Particularly, an elastic buffering system composed of a supporting ring, a supporting plate, a telescopic spring and a connecting plate can convert mechanical impact into spring deformation energy, the external force resisting performance is greatly improved, and meanwhile an efficient heat dissipation path can be formed by matching equidistant ventilation heat dissipation openings in the surface of the protective sleeve with an air channel between the protective sleeve and a connecting sleeve.

Description

Technical Field

[0001] This utility model belongs to the field of power cable technology, and in particular relates to an IE-grade K3 class radiation-resistant power cable. Background Technology

[0002] Category K3 radiation-resistant power cable (IE class) is a cable specifically designed for nuclear power plants. It belongs to IE class equipment and has specific performance requirements and safety levels. It is used to transmit power in related systems outside the containment of nuclear power plants.

[0003] It is mainly used in nuclear power plants and places with special requirements for flame retardancy. It is suitable for fixed power transmission and distribution lines with rated voltage of 0.6 / 1kV and below, such as power and lighting. It can also be used in IE class K3 category power systems with rated voltage of 10kV and below under seismic loads outside the containment of nuclear power plants to ensure emergency shutdown, containment isolation, emergency core cooling, reactor residual heat removal, reactor containment heat removal, and prevention of radioactive material release into the surrounding environment.

[0004] Currently, the existing technology for radiation-resistant power cables of Class K3 (IE grade) requires extremely high precision in the laying position during actual use. Due to the use of metal armor and multi-layer composite structure to meet nuclear safety protection standards, the self-weight of the cable is much greater than that of ordinary cables. This not only increases the difficulty of transportation and laying, but also places higher demands on the planning of the installation path. At the same time, it faces a severe risk of physical damage during operation. Frequent human trampling, mechanical compression caused by equipment movement, or accidental collisions with construction tools may cause damage to its outer sheath. In addition, the cable lacks elastic buffer design and special protective devices. It is only fixed by rigid cable trays or pipes, which cannot effectively disperse dynamic external forces. Even slight external impacts may cause the sheath to crack, or even damage the internal insulation layer and conductor, seriously threatening the safe and stable operation and service life of the cable.

[0005] To address the aforementioned issues, this application proposes an IE-grade K3 class radiation-resistant power cable. Utility Model Content

[0006] The purpose of this invention is to provide an IE-grade K3 class radiation-resistant power cable, which solves the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model relates to an IE-grade K3 class radiation-resistant power cable, comprising a protective sleeve. The outer surface of the protective sleeve has ventilation and heat dissipation vents arranged at equal intervals. A connecting sleeve is provided inside the protective sleeve, and a power cable is provided on the inner wall of the connecting sleeve. Two sets of support rings are fixedly connected to the outer surface of the connecting sleeve. Each set of support rings has a support plate arranged at equal intervals fixedly connected to one side of each set of support rings that is close to each other. Each support plate has two sets of telescopic springs fixedly connected to one side of each set of support plates that is away from the connecting sleeve. A connecting plate is fixedly connected to one end of each set of telescopic springs that is away from each other. The side of each set of connecting plates that is away from each other is in contact with the inner wall of the protective sleeve.

[0009] Furthermore, connecting rings are fixedly connected to both sides of the protective sleeve, and the inner wall of each connecting ring is fixedly connected to the outer surface of the connecting sleeve.

[0010] Furthermore, sealing rings are fixedly connected to both sides of the connecting sleeve, and the inner wall of each sealing ring is fixedly connected to the outer surface of the power cable.

[0011] Furthermore, each set of support plates has two sets of reinforcing rings fixedly connected to the opposite side of each other, and the inner wall of each reinforcing ring is fixedly connected to the outer surface of the telescopic spring.

[0012] Furthermore, each of the connecting plates has two fixing plates fixedly connected to its outer surface, and the side of each set of fixing plates that is far apart from each other is fixedly connected to the inner wall of the protective sleeve.

[0013] Furthermore, two sets of reinforcing ropes are fixedly connected to the inner walls of both sealing rings, and the outer surface of each reinforcing rope is fixedly connected to the inner wall of the connecting sleeve.

[0014] Furthermore, each set of reinforcing ropes has two sets of reinforcing rings fixedly connected to its outer surface. The inner wall of each reinforcing ring is fixedly connected to the outer surface of the power cable, and the outer surface of each reinforcing ring is fixedly connected to the inner wall of the connecting sleeve.

[0015] This utility model has the following beneficial effects:

[0016] This utility model greatly enhances the cable's resistance to external impact by setting up a buffer structure composed of a support ring, a support plate, a telescopic spring, and a connecting plate. When the cable is subjected to external forces such as human trampling and mechanical squeezing, the telescopic spring can absorb energy through deformation, avoiding the external force from acting directly on the power cable, effectively reducing the risk of sheath damage, and ensuring the safety and stability of the cable's internal structure.

[0017] This invention constructs an efficient heat dissipation system by opening equidistantly arranged ventilation and heat dissipation vents on the surface of the protective sleeve. During cable operation, heat can be quickly dissipated through the ventilation and heat dissipation vents. Combined with the air flow channel formed between the protective sleeve and the connecting sleeve, the service life of the cable is extended.

[0018] In summary, this utility model features an innovative design for mechanical protection, which significantly improves the cable's ability to resist external physical damage and its operational stability. It can better meet the stringent requirements for the reliability and safety of IE-grade K-class radiation-resistant power cables in special scenarios such as nuclear power plants.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the connecting plate in this utility model;

[0023] Figure 3 This is a schematic diagram of the support ring structure in this utility model;

[0024] Figure 4 This is a schematic diagram of the telescopic spring in this utility model;

[0025] Figure 5 This is a cross-sectional view of the connecting sleeve in this utility model;

[0026] The attached diagram lists the components represented by each number as follows:

[0027] In the diagram: 1. Protective sleeve; 2. Ventilation vent; 3. Connecting ring; 4. Sealing ring; 5. Power cable; 6. Connecting sleeve; 7. Connecting plate; 8. Support ring; 9. Telescopic spring; 10. Support plate; 11. Fixing plate; 12. Reinforcing ring; 13. Reinforcing rope; 14. Strengthening ring. Detailed Implementation

[0028] 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.

[0029] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Please see Figure 1-5 As shown, this utility model is an IE-grade K3 class radiation-resistant power cable, including a protective sleeve 1. The outer surface of the protective sleeve 1 has ventilation and heat dissipation vents 2 arranged at equal intervals. The inside of the protective sleeve 1 is provided with a connecting sleeve 6. The inner wall of the connecting sleeve 6 is provided with a power cable 5. Two sets of support rings 8 are fixedly connected to the outer surface of the connecting sleeve 6. Each set of support rings 8 has a support plate 10 arranged at equal intervals fixedly connected to the side of each support ring 8 that is close to each other. Each support plate 10 has two sets of telescopic springs 9 fixedly connected to the side of each support plate 10 that is away from the connecting sleeve 6. Each set of telescopic springs 9 has a connecting plate 7 fixedly connected to the end of each set of telescopic springs that is away from each other. The side of each set of connecting plates 7 that is away from each other is in contact with the inner wall of the protective sleeve 1.

[0031] In this embodiment, the support ring 8 in the buffer structure is made of high-strength stainless steel, which has excellent corrosion resistance and mechanical strength, and can work stably for a long time in the high humidity and high radiation environment of a nuclear power plant. At the same time, the support plate 10 is made of carbon fiber composite material, which can withstand high pressure without deformation while ensuring lightweight. The telescopic spring 9 is made of nickel-titanium shape memory alloy, which has good elastic recovery ability and fatigue resistance, and can quickly return to its original position after repeated stress. Combined with the polycarbonate engineering plastic material of the connecting plate 7, it can deform and absorb impact energy. In terms of heat dissipation design, the protective sleeve 1 is made of halogen-free low-smoke flame-retardant polyolefin material, which has both flame-retardant and radiation-resistant properties. Meanwhile, the internal connecting sleeve 6 is made of cross-linked polyethylene material with good thermal conductivity, forming an air flow channel between it and the protective sleeve 1. During cable operation, heat can be quickly dissipated through the ventilation vent 2. Combined with the high thermal conductivity of the connecting sleeve 6, the service life of the cable is extended.

[0032] In this embodiment, the protective sleeve 1 is fixedly connected to both sides with connecting rings 3, and the inner wall of each connecting ring 3 is fixedly connected to the outer surface of the connecting sleeve 6. In this embodiment, the connecting rings 3 can fix the protective sleeve 1 and the connecting sleeve 6, thereby improving the firmness between the protective sleeve 1 and the connecting sleeve 6.

[0033] In this embodiment, sealing rings 4 are fixedly connected to both sides of the connecting sleeve 6, and the inner wall of each sealing ring 4 is fixedly connected to the outer surface of the power cable 5. In this embodiment, the sealing rings 4 can seal the connection between the connecting sleeve 6 and the power cable 5, thereby improving the sealing performance between the connecting sleeve 6 and the power cable 5.

[0034] In this embodiment, two sets of reinforcing rings 12 are fixedly connected to the opposite side of each set of support plates 10. The inner wall of each reinforcing ring 12 is fixedly connected to the outer surface of the telescopic spring 9. In this embodiment, the connection between the telescopic spring 9 and the support plate 10 can be reinforced by the reinforcing rings 12, and the firmness of the telescopic spring 9 can be improved.

[0035] Each connecting plate 7 has two fixing plates 11 fixedly connected to its outer surface. The side of each set of fixing plates 11 that is far apart from each other is fixedly connected to the inner wall of the protective sleeve 1. In this embodiment, the connecting plate 7 can be fixed to the protective sleeve 1 through the fixing plates 11, so that the connecting plate 7 can stably support the protective sleeve 1.

[0036] Two sets of reinforcing ropes 13 are fixedly connected to the inner walls of the two sealing rings 4. The outer surface of each reinforcing rope 13 is fixedly connected to the inner wall of the connecting sleeve 6. In this embodiment, the reinforcing ropes 13 can reinforce the connecting sleeve 6 and the sealing rings 4, thereby improving the strength of the equipment.

[0037] Each set of reinforcing ropes 13 has two sets of reinforcing rings 14 fixedly connected to its outer surface. The inner wall of each reinforcing ring 14 is fixedly connected to the outer surface of the power cable 5, and the outer surface of each reinforcing ring 14 is fixedly connected to the inner wall of the connecting sleeve 6. In this embodiment, the reinforcing rings 14 can be used to reinforce the reinforcing ropes 13, the connecting sleeve 6 and the power cable 5, thereby further improving the strength of the power cable 5.

[0038] Understandably, the elastic buffer system consisting of the support ring 8, support plate 10, telescopic spring 9, and connecting plate 7 can first convert mechanical impact into spring deformation energy, greatly improving the resistance to external forces. At the same time, the equidistant ventilation and heat dissipation vents 2 on the surface of the protective sleeve 1, together with the air channel between the protective sleeve 1 and the connecting sleeve 6, can form an efficient heat dissipation path and reduce the internal temperature of the cable.

[0039] One specific application of this embodiment is as follows: In use, firstly, according to the nuclear power plant's laying path plan, the cable is placed in the cable tray or corridor using hoisting equipment. It is then fixed to the external support by the connecting rings 3 on both sides of the protective sleeve 1. At the same time, the reinforcing rope 13 and the reinforcing ring 14 work together to firmly bind the power cable 5, the connecting sleeve 6, and the sealing ring 4, preventing loosening of the connection due to vibration. When the cable is stepped on or squeezed by equipment, the telescopic spring 9 on the outside of the support plate 10 first undergoes elastic deformation, absorbing the impact energy through compression. At the same time, the reinforcing ring 12 restricts the radial displacement of the spring, ensuring that the buffering force is evenly transmitted to the support ring. 8. To avoid localized stress concentration, and during long-term operation, the heat generated by the power cable 5 is quickly conducted to the inner wall of the protective sleeve 1 through the cross-linked polyethylene material of the connecting sleeve 6. In conjunction with the ventilation and heat dissipation vent 2, the internal temperature of the cable is conducted to the outside. In addition, during the regular maintenance of the nuclear power plant, the cable condition can be quickly checked by observing whether there are foreign objects blocking the ventilation and heat dissipation vent 2 and whether the connection between the connecting plate 7 and the fixing plate 11 is loose. If the buffer component needs to be replaced, the connecting plate 7 and the protective sleeve 1 can be separated simply by disassembling the fixing plate 11, and the telescopic spring 9 or the support plate 10 can be easily maintained or replaced, which greatly improves the efficiency of operation and maintenance.

[0040] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An IE-grade K3 class radiation-resistant power cable, comprising a protective sheath (1), characterized in that: The outer surface of the protective sleeve (1) is provided with ventilation and heat dissipation vents (2) arranged at equal intervals. The inner side of the protective sleeve (1) is provided with a connecting sleeve (6). The inner wall of the connecting sleeve (6) is provided with a power cable (5). The outer surface of the connecting sleeve (6) is fixedly connected with two sets of support rings (8). Each set of support rings (8) is fixedly connected with a support plate (10) arranged at equal intervals on the side that is close to each other. Each support plate (10) is fixedly connected with two sets of telescopic springs (9) on the side that is away from the connecting sleeve (6). Each set of telescopic springs (9) is fixedly connected with a connecting plate (7) on the side that is away from each other. The side of each set of connecting plates (7) is in contact with the inner wall of the protective sleeve (1).

2. The radiation-resistant power cable of IE class K3 according to claim 1, characterized in that: Both sides of the protective sleeve (1) are fixedly connected with connecting rings (3), and the inner wall of each connecting ring (3) is fixedly connected to the outer surface of the connecting sleeve (6).

3. The radiation-resistant power cable of IE class K3 according to claim 1, characterized in that: Both sides of the connecting sleeve (6) are fixedly connected with sealing rings (4), and the inner wall of each sealing ring (4) is fixedly connected to the outer surface of the power cable (5).

4. The radiation-resistant power cable of IE class K3 according to claim 1, characterized in that: Each set of support plates (10) has two sets of reinforcing rings (12) fixedly connected to the side of each set of support plates (10) that are far apart from each other. The inner wall of each reinforcing ring (12) is fixedly connected to the outer surface of the telescopic spring (9).

5. The radiation-resistant power cable of IE class K3 according to claim 1, characterized in that: Two fixing plates (11) are fixedly connected to the outer surface of each connecting plate (7), and the side of each set of fixing plates (11) that is far apart from each other is fixedly connected to the inner wall of the protective sleeve (1).

6. The radiation-resistant power cable of IE class K3 according to claim 3, characterized in that: Two sets of reinforcing ropes (13) are fixedly connected to the inner walls of the two sealing rings (4), and the outer surface of each reinforcing rope (13) is fixedly connected to the inner wall of the connecting sleeve (6).

7. The radiation-resistant power cable of IE class K3 according to claim 6, characterized in that: Two sets of reinforcing rings (14) are fixedly connected to the outer surface of each set of reinforcing ropes (13). The inner wall of each reinforcing ring (14) is fixedly connected to the outer surface of the power cable (5), and the outer surface of each reinforcing ring (14) is fixedly connected to the inner wall of the connecting sleeve (6).

Images