An irradiation crosslinked cable

Abstract

The utility model provides a kind of irradiation crosslinking cable, by being covered first polyolefin insulating layer, waterproof layer and radiation crosslinking polyolefin sheath layer in order outside cable core, the heat resistance, moisture resistance and corrosion resistance of cable are significantly improved;And the setting of radiation crosslinking polyolefin sheath layer, give cable excellent tear strength and wear resistance, can resist external mechanical stress, friction and extrusion, protect cable from physical damage, to make cable have good anti-aging ability;While by filling heat dissipation hose between the cable core and first radiation crosslinking polyolefin insulating layer, effectively improve cable density and provide certain support for cable structure;The heat dissipation hose is composed of alumina core strip and the heat-conducting silica gel layer of its outer layer, can quickly the cable core working heat is quickly conducted to the first radiation crosslinking polyolefin insulating layer interface and dissipate to outside, effectively improve the heat dissipation performance of cable, optimize the heat resistance of cable, further improve the anti-aging ability of cable.

Description

Technical Field

[0001] This utility model relates to the field of cable manufacturing technology, and in particular to an irradiated cross-linked cable. Background Technology

[0002] Cables are the core carriers of electrical energy and signal transmission, and are widely used in power, communication, transportation and other fields. The main structure of existing cables includes conductors, insulation layers and sheaths, and the performance of cables depends on material stability, structural design and environmental adaptability.

[0003] With industrial development, cables are facing more application scenarios and more extreme environments. For example, in environments such as rail transportation or seabed exploration, some cables are exposed to high temperature, high humidity, strong radiation, or corrosive media for a long time, which can easily cause premature aging of the cables, resulting in insulation failure, reduced transmission efficiency, and even safety accidents.

[0004] Therefore, in order to prevent the performance degradation of cables due to accelerated aging in high temperature, high humidity and highly corrosive environments, it is necessary to provide an anti-aging cable that meets actual working requirements. Utility Model Content

[0005] In view of the technical problems in the prior art, this utility model provides an irradiated cross-linked cable.

[0006] A radiation-crosslinked cable includes a cable body comprising a core and a first radiation-crosslinked polyolefin insulation layer, a waterproof layer, and a radiation-crosslinked polyolefin sheath layer sequentially covering the outside of the core; the core comprises a main core and a plurality of secondary cores spirally twisted around the main core; each of the main core and secondary cores comprises a copper conductor and a second radiation-crosslinked polyolefin insulation layer and a ceramicized silicone rubber layer sequentially covering the outside of the copper conductor; a plurality of heat-dissipating flexible tubes are filled between the core and the first radiation-crosslinked polyolefin insulation layer; each heat-dissipating flexible tube comprises an alumina core strip and a thermally conductive silicone layer covering the alumina core strip, wherein the alumina core strip is cylindrical.

[0007] Furthermore, the copper conductor is an oxygen-free copper conductor, and the outer surface of the oxygen-free copper conductor is plated with a zinc layer.

[0008] Furthermore, both the first radiation-crosslinked polyolefin insulation layer and the second radiation-crosslinked polyolefin insulation layer are radiation-crosslinked polypropylene insulation layers; the radiation-crosslinked polyolefin sheath layer is a radiation-crosslinked polyethylene sheath layer.

[0009] Furthermore, the radiation crosslinked polyolefin sheath layer includes an inner sheath layer, an outer sheath layer, and connecting strips equidistantly spaced between the outer sheath layer and the inner sheath layer; and each adjacent connecting strip forms a cavity with the inner sheath layer and the outer sheath layer, and each cavity is filled with a plurality of water-resistant yarns.

[0010] Furthermore, the thickness of the inner layer of the sheath is 0.4-0.8 times the thickness of the outer layer of the sheath.

[0011] Furthermore, a wear-resistant layer is provided outside the radiation cross-linked polyolefin sheath layer, and a number of wear-resistant protrusions are spaced apart on the outer surface of the wear-resistant layer.

[0012] Furthermore, an aramid fiber braided layer is provided between the second radiation cross-linked polyolefin insulation layer and the waterproof layer.

[0013] Furthermore, the weaving density of the aramid fiber braided layer is 60%-80%.

[0014] Furthermore, a PTFE insulating layer is also filled between the aramid fiber braided layer and the second radiation-crosslinked polyolefin insulating layer.

[0015] Furthermore, the waterproof layer is an aluminum-plastic composite tape layer.

[0016] The beneficial effects of this utility model are as follows: This utility model provides a radiation cross-linked cable. By sequentially covering the cable core with a first polyolefin insulation layer, a waterproof layer, and a radiation cross-linked polyolefin sheath layer, the heat resistance, moisture resistance, and corrosion resistance of the cable are significantly improved. Furthermore, the radiation cross-linked polyolefin sheath layer endows the cable with excellent tear resistance and abrasion resistance, enabling it to resist external mechanical stress, friction, and compression, protecting the cable from physical damage, and thus giving the cable good anti-aging capabilities. Simultaneously, by filling the space between the cable core and the first radiation cross-linked polyolefin insulation layer with a heat-dissipating hose, the cable density is effectively improved, and a certain degree of support is provided for the cable structure. This heat-dissipating hose, composed of an alumina core strip and an outer thermally conductive silicone layer, can quickly conduct the working heat of the cable core to the interface of the first radiation cross-linked polyolefin insulation layer and dissipate it to the outside, effectively improving the cable's heat dissipation performance and further optimizing the cable's heat resistance.

[0017] By incorporating various protective layers and heat dissipation hoses on the outside of the cable core, the prepared irradiated cross-linked cable possesses excellent weather resistance and anti-aging properties, meeting practical application requirements. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an irradiated cross-linked cable provided by this utility model.

[0019] Figure 2 for Figure 1An enlarged structural diagram of part A.

[0020] Attached Figure

[0021] 1. First radiation-crosslinked polyolefin insulation layer; 2. Waterproof layer; 3. Radiation-crosslinked polyolefin sheath layer; 31. Inner sheath layer; 32. Outer sheath layer; 33. Connecting strip; 4. Main conductor; 41. Oxygen-free copper conductor; 42. Second radiation-crosslinked polyolefin insulation layer; 43. Ceramicized silicone rubber layer; 5. Secondary conductor; 6. Water-blocking yarn; 7. Heat dissipation hose; 71. Alumina core strip; 72. Thermally conductive silicone layer; 8. Wear-resistant layer; 9. Aramid fiber braided layer. Detailed Implementation

[0022] To provide a more detailed description of this utility model, the following description is provided in conjunction with the accompanying drawings. It should be noted that the embodiments described below are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] refer to Figure 1 As shown, an irradiated cross-linked cable includes a cable body, the cable body including a cable core (not shown in the figure) and a first radiation cross-linked polyolefin insulation layer 1, a waterproof layer 2 and a radiation cross-linked polyolefin sheath layer 3 sequentially wrapped around the outside of the cable core.

[0024] After radiation crosslinking treatment, the temperature resistance of polyolefins can be increased to 200℃ and a thermosetting structure can be formed, thereby significantly improving the thermal stability and anti-aging ability of the first radiation-crosslinked polyolefin insulation layer 1 and the radiation-crosslinked polyolefin sheath layer 3. At the same time, radiation crosslinking technology can also improve the mechanical strength and abrasion resistance of polyolefins, giving the radiation-crosslinked polyolefin sheath layer 3 excellent tensile strength, tear strength and abrasion resistance, protecting the cable from physical damage and preventing it from aging accelerated due to external mechanical stress, friction and extrusion.

[0025] The waterproof layer 2 effectively prevents moisture from penetrating into the cable, protecting the internal conductors and protective layers from moisture corrosion and preventing accelerated aging and performance instability caused by high humidity. In this embodiment, the waterproof layer 2 is an aluminum-plastic radiating strip layer.

[0026] Specifically, the cable core includes a main core 4 and several secondary cores 5 spirally twisted around the outside of the main core 4; both the main core 4 and the secondary cores 5 include an oxygen-free copper conductor 41 and a second radiation-crosslinked polyolefin insulation layer 42 and a ceramicized silicone rubber layer 43 sequentially covering the outside of the oxygen-free copper conductor 41. In this embodiment, the first radiation-crosslinked polyolefin insulation layer 41 and the second radiation-crosslinked polyolefin insulation layer 42 are both radiation-crosslinked polypropylene insulation layers; the radiation-crosslinked polyolefin sheath layer 3 is a radiation-crosslinked polyethylene sheath layer.

[0027] The second radiation cross-linked polyolefin insulation layer 42 provides excellent insulation performance for each core, as well as good heat resistance and strength. The ceramicized silicone rubber layer 43 can form a dense ceramic shell in the flame, preventing the flame from spreading to the oxygen-free copper conductor 41. While being flame-retardant, it can also ensure the conductivity of the oxygen-free copper conductor 41, thereby improving the heat resistance of the cable. Furthermore, the ceramicized silicone rubber layer 43 produces low smoke and is non-toxic when burning, improving the safety of use.

[0028] Through the synergistic effect of the oxygen-free copper conductor 41, the second radiation-crosslinked polyolefin insulation layer 42, and the ceramicized silicone rubber layer 43, the cable core possesses high-efficiency conductivity, safe insulation, and excellent fire resistance.

[0029] In this embodiment, the outer surface of the oxygen-free copper conductor is plated with a zinc layer. Oxygen-free copper conductors possess excellent conductivity, and the zinc plating layer forms a dense protective layer on the surface of the oxygen-free copper conductor, effectively preventing the intrusion of air, moisture, and corrosive media, thus ensuring the stability of the oxygen-free copper conductor's performance.

[0030] refer to Figure 1 and Figure 2 As shown, the radiation-crosslinked polyolefin sheath layer 3 includes an inner sheath layer 31, an outer sheath layer 32, and connecting strips 33 equidistantly spaced between the outer sheath layer 31 and the inner sheath layer 32. Each adjacent connecting strip 33 forms a cavity (not shown in the figure) with the inner sheath layer 31 and the outer sheath layer 32, and each cavity is filled with several water-blocking yarns 6. Upon contact with water, the water-blocking yarns expand sufficiently to form a gel-like sealing layer, effectively blocking the penetration of moisture along the axial or radial direction inside the cable, thus improving the cable's moisture resistance and waterproof performance.

[0031] A plurality of heat dissipation hoses 7 are filled between the cable core and the first radiation cross-linked polyolefin insulation layer 1; each heat dissipation hose 7 includes an alumina core strip 71 and a thermally conductive silicone layer 72 covering the alumina core strip 71, and the alumina core strip 72 is cylindrical. In this embodiment, the thickness of the inner sheath layer 31 is 0.4-0.8 times the thickness of the outer sheath layer 32.

[0032] Both alumina and thermally conductive silicone possess excellent thermal conductivity. The alumina core strip 71 provides structural support and a heat conduction path for the heat dissipation hose 7, and together with the thermally conductive silicone layer 72, it can quickly conduct the heat generated by the cable core to the outside, effectively improving heat dissipation efficiency. The flexibility of the thermally conductive silicone layer can fill the tiny gaps between the alumina core strip 71 and the cable core, reducing contact thermal resistance and thus improving overall thermal conductivity. At the same time, the filling of the heat dissipation hose 7 also effectively improves the cable density and provides some support for the cable structure.

[0033] The radiation crosslinked polyolefin sheath layer 3 is further provided with a wear-resistant layer 8, and the outer surface of the wear-resistant layer 8 is provided with a number of wear-resistant protrusions at intervals (not shown in the figure).

[0034] The wear-resistant layer 8 and the wear-resistant protrusions can effectively reduce the friction between the cable and the contact surface during laying, dragging or moving, and avoid the risk of accelerated aging or performance loss of the cable due to damage to the radiation cross-linked polyolefin sheath layer 3. Example

[0035] refer to Figure 1 As shown, the distinguishing feature of Example 2 compared to Example 1 is that an aramid fiber braided layer 9 is further provided between the second radiation-crosslinked polyolefin insulating layer 42 and the waterproof layer 2. A PTFE insulating layer (not shown in the figure) is also filled between the aramid fiber braided layer 9 and the second radiation-crosslinked polyolefin insulating layer 42. In this example, the braiding density of the aramid fiber braided layer 9 is 60%-80%.

[0036] The aramid fiber braided layer 9 enhances the cable's axial tensile strength, preventing accelerated aging caused by frequent bending or mechanical stress. The PTFE insulating layer buffers external impacts and protects the internal second radiation-crosslinked polyolefin insulation layer 42 from mechanical damage. Furthermore, the aramid fiber braided layer 9 and the PTFE insulating layer improve the cable's overall corrosion resistance.

[0037] This utility model provides an irradiated cross-linked cable, which includes a cable core, a first polyolefin insulation layer 1, a waterproof layer 2, a radiation cross-linked polyolefin sheath layer 3, and a heat dissipation hose 7. The arrangement of these components can significantly improve the cable's heat resistance, moisture resistance, and corrosion resistance, thereby enhancing the cable's weather resistance and anti-aging ability.

[0038] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model and do not limit the utility model to the specific implementations described. Obviously, other modifications and variations can be made based on the content of this specification. The embodiments selected and specifically described in this specification are intended 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. They are not intended to limit the utility model, and any simple modifications to this utility model fall within the protection scope of this utility model.

Claims

1. An irradiation crosslinked cable comprising a cable body, characterized in that, The cable body includes a cable core and a first radiation-crosslinked polyolefin insulation layer, a waterproof layer, and a radiation-crosslinked polyolefin sheath layer sequentially wrapped around the outside of the cable core. The cable core includes a main core and several secondary cores spirally twisted around the outside of the main core; each of the main core and secondary cores includes an oxygen-free copper conductor and a second radiation-crosslinked polyolefin insulation layer and a ceramicized silicone rubber layer sequentially covering the outside of the copper conductor; and the outer surface of the oxygen-free copper conductor is galvanized. A plurality of heat dissipation hoses are filled between the cable core and the first radiation cross-linked polyolefin insulation layer; the heat dissipation hoses include an alumina core strip and a thermally conductive silicone layer covering the alumina core strip, and the alumina core strip is cylindrical.

2. The irradiated cross-linked cable according to claim 1, characterized in that, The first and second radiation-crosslinked polyolefin insulation layers are both radiation-crosslinked polypropylene insulation layers; the radiation-crosslinked polyolefin sheath layer is a radiation-crosslinked polyethylene sheath layer.

3. The irradiated cross-linked cable according to claim 1, characterized in that, The radiation cross-linked polyolefin sheath layer includes an inner sheath layer, an outer sheath layer, and connecting strips that are equidistantly spaced between the outer sheath layer and the inner sheath layer; and each adjacent connecting strip forms a cavity with the inner sheath layer and the outer sheath layer, and each cavity is filled with a number of water-resistant yarns.

4. The irradiated cross-linked cable according to claim 3, characterized in that, The thickness of the inner layer of the sheath is 0.4-0.8 times the thickness of the outer layer of the sheath.

5. The irradiated cross-linked cable according to claim 1, characterized in that, The radiation-crosslinked polyolefin sheath layer is further provided with a wear-resistant layer, and the outer surface of the wear-resistant layer is provided with a number of wear-resistant protrusions at intervals.

6. The irradiated cross-linked cable according to claim 1, characterized in that, An aramid fiber braided layer is also provided between the second radiation cross-linked polyolefin insulation layer and the waterproof layer.

7. The irradiated cross-linked cable according to claim 6, characterized in that, The braiding density of the aramid fiber braided layer is 60%-80%.

8. The irradiated cross-linked cable according to claim 6, characterized in that, A PTFE insulating layer is also filled between the aramid fiber braided layer and the second radiation-crosslinked polyolefin insulating layer.

9. The irradiated cross-linked cable according to claim 1, characterized in that, The waterproof layer is an aluminum-plastic composite tape layer.

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