High dose irradiation resistant cable structure

Abstract

The utility model discloses a high dose irradiation resistant cable structure, which comprises a cable protection layer, an irradiation resistant layer is fixedly connected in the cable protection layer, a filling hole is arranged on the surface of the irradiation resistant layer, a filling layer is fixedly filled in the irradiation resistant layer, a filling head is formed on the outer surface of the filling layer, and the filling head is fixedly connected with the cable protection layer. The filling head is fixedly connected with the interior of the filling hole, the insulating layer is fixedly embedded in the filling layer, the wire core is fixedly embedded in the insulating layer, the insulating layer and the wire core are fixedly embedded in the filling layer, the outer surface of the insulating layer is fixedly connected with the connecting strip, and the connecting strip is fixedly embedded in the filling layer. The outer surface of the cable protection layer is fixedly wrapped with the packaging layer, and the reinforcing strips are fixedly embedded in the packaging layer, so that the cable can be combined and reinforced, the auxiliary support of the surface is facilitated, the safety of pavement and use is improved, the combined processing is facilitated, and the connection and use are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of cables, and more specifically, to a cable structure resistant to high dose radiation. Background Technology

[0002] There are many types of cables used in nuclear power plants, and they are generally classified in two ways: one is according to the function of the cable, including power cables, control cables, instrumentation cables, communication cables, and compensating cables; the other is according to the safety level. Nuclear power plant cables belong to the 1E safety level and should have a service life of more than 40 years. 1E class cables can be further divided into K1 class cables (withstanding 850 kGy radiation) and K2 class cables (withstanding 250 kGy radiation) according to the safety category of the nuclear power plant's electrical system equipment.

[0003] The development of nuclear power has received strong support, and the technologies used in my country's nuclear power plants are constantly being updated. Consequently, the requirements for cables used in nuclear power plants are also constantly evolving. Since the advent of AP1000 (larger pressurized water reactor nuclear power plant) third-generation nuclear power technology, cables for nuclear power plants have been divided into containment cables and containment cables. Containment cables, in addition to meeting all the performance requirements of K1 category cables, must also meet the high radiation dose requirement of 2750 kGy and a service life of 60 years. However, with the increasing safety levels of nuclear power plants, the safety requirements for cables have also increased, especially the radiation dose resistance requirements. Therefore, higher demands are placed on the cable structure, materials, and manufacturing processes.

[0004] Application publication number CN104464924A discloses a novel high-dose radiation-resistant cable structure for use inside the containment of nuclear power plants, including a conductor, an insulator, a wrapping tape, an oxygen barrier layer, a shielding layer, and an outer sheath. The insulator wraps the conductor and is then wrapped by the wrapping tape. The oxygen barrier layer wraps the wrapping tape, the shielding layer wraps the oxygen barrier layer, and the outer sheath wraps the shielding layer. It also includes a polyimide tape wrapped around the insulator. When wrapping the polyimide tape, a portion of the upper layer is covered by a portion of the lower layer. This novel high-dose radiation-resistant cable is suitable for use inside the containment of nuclear power plants.

[0005] In the above-disclosed structure, a layer of wrapping tape is simply connected inside the cable to improve radiation resistance. However, the lack of a corresponding filling layer and connection structure inside affects the stability of the connection of multiple wire cores and the service life. Furthermore, the lack of a corresponding sealing layer and reinforcing strip on the surface fails to provide surface protection, affecting the performance. A new structure needs to be proposed for improvement. Utility Model Content

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide a high-dose radiation resistant cable structure. By wrapping an radiation-resistant layer inside the cable protective layer and combining it with a filler layer to connect the insulation layer and the wire core, the internal structural strength and stability can be guaranteed, improving the safety of cable use. Furthermore, by connecting the surface sealing layer and reinforcing strips, the cable can be reinforced and combined, and it is also beneficial for surface auxiliary support, improving the safety of installation and use, facilitating assembly and processing, and making connection and use convenient.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A high-dose radiation-resistant cable structure includes a cable protective layer, an irradiation-resistant layer fixedly connected inside the cable protective layer, a filling hole on the surface of the irradiation-resistant layer, a filling layer fixedly filled inside the irradiation-resistant layer, a filling head formed on the outer surface of the filling layer, the filling head fixedly connected to the inside of the filling hole, an insulation layer fixedly embedded inside the filling layer, a wire core fixedly embedded inside the insulation layer, the insulation layer and the wire core fixedly embedded inside the filling layer, a connecting strip fixedly connected to the outer surface of the insulation layer, the connecting strip fixedly embedded inside the filling layer, an encapsulation layer fixedly wrapped around the outer surface of the cable protective layer, a reinforcing strip fixedly embedded inside the encapsulation layer, the reinforcing strip fixedly connected to the outer surface of the cable protective layer, and a heat-sealing protrusion on the outer surface of the encapsulation layer fixedly wrapped around the outer surface of the reinforcing strip.

[0009] Furthermore, the filling holes and filling heads are distributed at equal angles on the outer circular surface of the radiation-resistant layer and are equally spaced along the length direction.

[0010] Furthermore, there are at least five insulating layers and wire cores, which are uniformly connected at equal angles inside the filling layer.

[0011] Furthermore, the filling layer is formed by heat-resistant foam filling and is uniformly wrapped around the outer surface of the insulation layer. By distributing the insulation layer and filling head at equal intervals, they can be combined, connected and positioned to ensure uniformity. Moreover, the filling is carried out through the filling holes without interference, which facilitates the control of the process.

[0012] Furthermore, the encapsulation layer adopts a heat-sealing structure and is completely wrapped and connected to the outer surface of the cable protection layer.

[0013] Furthermore, there are three reinforcing strips, which are evenly distributed at equal angles on the outer circumference of the cable protection layer.

[0014] Furthermore, the reinforcing strip is made of nylon fiber and its length is consistent with that of the cable protective layer. By distributing three reinforcing strips at equal intervals, the surface can be further supported, avoiding surface wear, improving structural strength, and ensuring service life and stability.

[0015] Compared with existing technologies, the advantages of this utility model are:

[0016] (1) This solution can ensure the strength and stability of the internal structure by wrapping the radiation-resistant layer inside the cable protection layer and connecting the insulation layer and the wire core with the filling layer, thereby improving the safety of cable use. Furthermore, by connecting the sealing layer and reinforcing strip on the surface, the cable can be reinforced and combined, which is conducive to surface auxiliary support, improving the safety of installation and use, facilitating assembly and processing, and making connection and use convenient.

[0017] (2) By distributing the insulating layer and filling head at equal intervals, they can be combined and positioned to ensure uniformity. Furthermore, the filling is done through the filling holes without interference, making it convenient to control the processing.

[0018] (3) By distributing three reinforcing strips at equal intervals, the surface can be supported to avoid surface wear, improve structural strength, and ensure service life and stability. Attached Figure Description

[0019] Figure 1 This is a three-dimensional external view of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0021] Figure 3 This is a perspective view of a partial structure of the present invention;

[0022] Figure 4 This is a partial structural diagram showing the connection between the insulating layer and the filling layer of this utility model;

[0023] Figure 5 This is a partial structural diagram of the reinforcing strip connection of this utility model.

[0024] Explanation of the labels in the diagram:

[0025] 1. Cable protection layer, 11. Radiation resistant layer, 12. Filling hole, 13. Filling layer, 14. Filling head, 15. Insulation layer, 16. Wire core, 17. Connecting strip, 2. Encapsulation layer, 21. Reinforcing strip, 22. Heat-sealing protrusion. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1 , Figure 2 and Figure 4 A high-dose radiation resistant cable structure includes a cable protective layer 1, an irradiation-resistant layer 11 fixedly connected inside the cable protective layer 1, a filling hole 12 on the surface of the irradiation-resistant layer 11, a filling layer 13 fixedly filled inside the irradiation-resistant layer 11, a filling head 14 formed on the outer surface of the filling layer 13, the filling head 14 fixedly connected to the inside of the filling hole 12, an insulation layer 15 fixedly embedded inside the filling layer 13, a wire core 16 fixedly embedded inside the insulation layer 15, the insulation layer 15 and the wire core 16 fixedly embedded inside the filling layer 13, and a connecting strip 17 fixedly connected to the outer surface of the insulation layer 15. Inside the filling layer 13, the outer surface of the cable protection layer 1 is fixedly wrapped with an encapsulation layer 2. A reinforcing strip 21 is fixedly embedded inside the encapsulation layer 2. The reinforcing strip 21 is fixedly connected to the outer surface of the cable protection layer 1. The outer surface of the encapsulation layer 2 is provided with heat-sealing protrusions 22, which are fixedly wrapped around the outer surface of the reinforcing strip 21. The wire core 16 is connected through the insulation layer 15 and combined with the connecting strip 17 for reinforcement. It is also uniformly embedded inside the filling layer 13, which can ensure the internal uniformity and strength and improve the safety of use. The radiation-resistant layer 11 can improve the radiation resistance and is conducive to adapting to more complex environments, with high adaptability.

[0028] Please see Figure 2 and Figure 3 The filling holes 12 and filling heads 14 are distributed at equal angles on the outer circular surface of the radiation-resistant layer 11 and are equally spaced along the length direction. There are at least five insulating layers 15 and wire cores 16, which are uniformly connected at equal angles inside the filling layer 13. The filling layer 13 is formed by filling with heat-resistant foam and is uniformly wrapped around the outer surface of the insulating layer 15. By distributing the insulating layer and filling heads at equal intervals, they can be combined, connected, and positioned to ensure uniformity. Furthermore, the filling is done through the filling holes without interference, which facilitates processing control.

[0029] Please see Figure 2 and Figure 5The encapsulation layer 2 adopts a heat-sealing structure and is completely wrapped and connected to the outer surface of the cable protection layer 1. There are three reinforcing strips 21, which are evenly distributed at equal angles on the outer circular surface of the cable protection layer 1. The reinforcing strips 21 are made of nylon fiber and have the same length as the cable protection layer 1. By distributing the three reinforcing strips at equal intervals, the surface can be auxiliaryly supported, avoiding surface wear, improving structural strength, and ensuring service life and stability. During production, the reinforcing strips 21 can be first laminated to the outer surface of the cable protection layer 1 to reinforce the cable body. Then, the encapsulation layer 21 is fitted and heat-sealed with hot air to tightly wrap the outer surface of the cable protection layer 1. The position where the reinforcing strips 21 are wrapped can form heat-sealing protrusions 22. On the one hand, it can isolate and protect the surface of the cable protection layer 1. On the other hand, the reinforcing strips 21 can form support protrusions to support the cable protection layer 1, thereby reducing wear, improving strength and safety, and facilitating combination and use.

[0030] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A high-dose radiation-resistant cable structure, comprising a cable protective layer (1), wherein an radiation-resistant layer (11) is fixedly connected inside the cable protective layer (1), characterized in that: The surface of the radiation-resistant layer (11) is provided with a filling hole (12). The interior of the radiation-resistant layer (11) is fixedly filled with a filling layer (13). A filling head (14) is formed on the outer surface of the filling layer (13). The filling head (14) is fixedly connected to the interior of the filling hole (12). An insulating layer (15) is fixedly embedded inside the filling layer (13). A wire core (16) is fixedly embedded inside the insulating layer (15). The insulating layer (15) and the wire core (16) are fixedly embedded inside the filling layer (13). A connecting strip (17) is fixedly connected to the outer surface of the insulation layer (15). The connecting strip (17) is fixedly embedded inside the filling layer (13). A sealing layer (2) is fixedly wrapped around the outer surface of the cable protection layer (1). A reinforcing strip (21) is fixedly embedded inside the sealing layer (2). The reinforcing strip (21) is fixedly connected to the outer surface of the cable protection layer (1). A heat-sealing protrusion (22) is provided on the outer surface of the sealing layer (2). The heat-sealing protrusion (22) is fixedly wrapped around the outer surface of the reinforcing strip (21).

2. The high-dose radiation resistant cable structure according to claim 1, characterized in that: The filling holes (12) and filling heads (14) are distributed at equal angles on the outer circular surface of the radiation-resistant layer (11) and are distributed at equal intervals along the length direction.

3. The high-dose radiation resistant cable structure according to claim 1, characterized in that: There are at least five insulating layers (15) and wire cores (16), which are uniformly connected at equal angles inside the filling layer (13).

4. The high-dose radiation resistant cable structure according to claim 1, characterized in that: The filling layer (13) is formed by filling with heat-resistant foam and is uniformly wrapped around the outer surface of the insulating layer (15).

5. The high-dose radiation resistant cable structure according to claim 1, characterized in that: The encapsulation layer (2) adopts a heat-sealing structure and is completely wrapped and connected to the outer surface of the cable protection layer (1).

6. The high-dose radiation resistant cable structure according to claim 1, characterized in that: There are three reinforcing strips (21), which are evenly distributed at equal angles on the outer surface of the cable protection layer (1).

7. The high-dose radiation resistant cable structure according to claim 1, characterized in that: The reinforcing strip (21) is made of nylon fiber and its length is consistent with that of the cable protection layer (1).

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