High-temperature-resistant anti-cracking overhead insulated cable

Abstract

The utility model relates to the technical field of power cables, in particular to a high-temperature-resistant anti-cracking overhead insulated cable, which comprises a cable conductor, a cable conductor shielding layer arranged at the outer end of the cable conductor, an insulating layer wrapped outside the cable conductor shielding layer, filler filled on the periphery of the insulating layer, an inner sheath arranged on the periphery of the insulating layer, and a protective layer arranged on the periphery of the inner sheath. According to the utility model, through arranging the cable shielding layer, the insulating layer, the filler, the inner sheath, the protective layer, the outer sheath and other structures, the high temperature resistance and the anti-cracking performance of the cable are improved; the buffer cavity in the filler can effectively buffer external impact force, and the risk of cable cracking is reduced; the protection layer of the spiral steel belt structure can further improve the mechanical strength and the protection performance of the cable; and the inner sheath and the outer sheath which are made of low-smoke halogen-free flame-retardant materials have good flame-retardant performance, so that the safety of the cable is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a high-temperature resistant and crack-resistant overhead insulated cable. Background Art

[0002] Overhead insulated cable is an overhead conductor equipped with an insulating layer and a protective outer sheath. It is a special cable manufactured using a production process similar to that of cross-linked cables. It is a new type of power transmission method between overhead conductors and underground cables. Cables play an indispensable role in the electrical industry. Wherever there is electricity, there are cables. In life, where there is production, transportation and all economic activities, the application and transmission of electricity are inseparable.

[0003] However, the applicant has found that the prior art has at least the following problems:

[0004] Existing overhead insulated cables have limited protection capabilities and relatively low mechanical strength. They are easily damaged by external forces, such as scratches and flattening, which can cause their insulation performance to degrade or fail. At the same time, they have poor flame retardancy and are not resistant to high temperatures. Utility Model Content

[0005] In view of this, the purpose of the present invention is to propose a high-temperature resistant and crack-resistant overhead insulated cable to solve the problems of limited protection capability of existing cables, relatively low mechanical strength, and susceptibility to damage by external forces such as scratches and flattening, which lead to degradation or failure of their insulation performance, as well as poor flame retardant effect and high temperature resistance.

[0006] Based on the above purposes, the utility model provides a high-temperature resistant and crack-resistant overhead insulated cable, including a cable line, a cable line shielding layer is provided at the outer end of the cable line, an insulating layer is wrapped around the outside of the cable line shielding layer, the outer periphery of the insulating layer is filled with filler, an inner sheath is provided around the outer periphery of the insulating layer, a protective layer is provided around the outer periphery of the inner sheath, and an outer sheath is provided around the outer periphery of the protective layer.

[0007] Optionally, a buffer cavity is opened inside the filler, and the number of the buffer cavities is four.

[0008] Optionally, the protective layer is a spiral steel belt structure.

[0009] Optionally, the inner sheath and the outer sheath are both made of low-smoke halogen-free flame retardant material.

[0010] Optionally, the number of the cables is four, and a reinforcing core is provided on the inner side of the cables.

[0011] Optionally, the cable shielding layer is made of copper wire.

[0012] Optionally, the insulating layer is made of polyvinyl chloride.

[0013] The beneficial effects of the present invention are as follows: by arranging structures such as a cable shielding layer, an insulating layer, a filler, an inner sheath, a protective layer and an outer sheath, the high temperature resistance and crack resistance of the cable are improved; the buffer cavity inside the filler can effectively buffer external impact forces and reduce the risk of cable cracking; the protective layer of the spiral steel belt structure can further improve the mechanical strength and protective performance of the cable; the inner sheath and outer sheath of the low-smoke halogen-free flame retardant material have good flame retardant properties, thereby improving the safety of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a right side view of the utility model;

[0017] Figure 3 This utility model Figure 2 A sectional perspective view at the middle AA;

[0018] Figure 4 It is a three-dimensional diagram of the protective layer of the present utility model.

[0019] In the figure: 1. Cable; 2. Cable shielding layer; 3. Insulation layer; 4. Filler; 5. Inner sheath; 6. Protective layer; 7. Outer sheath; 8. Buffer cavity; 9. Reinforced core. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0022] like Figures 1 to 4 As shown, a specific embodiment of the utility model provides a high-temperature resistant and crack-proof overhead insulated cable, including a cable line 1, a cable line shielding layer 2 is provided at the outer end of the cable line 1, an insulating layer 3 is wrapped on the outside of the cable shielding layer 2, the outer periphery of the insulating layer 3 is filled with filler 4, an inner sheath 5 is provided on the outer periphery of the insulating layer 3, a protective layer 6 is provided on the outer periphery of the inner sheath 5, and an outer sheath 7 is provided on the outer periphery of the protective layer 6.

[0023] The material selection of the insulating layer 3, the inner sheath 5 and the outer sheath 7, as well as the high-temperature resistant material in the filler 4, jointly ensure the stability and safety of the cable 1 in a high-temperature environment. The design of the spiral steel belt structure of the buffer cavity 8 and the protective layer 6 can effectively isolate the heat through specific structural design and material selection when heat is generated inside the cable 1, thereby preventing the cable 1 from cracking due to high temperature. The protective layer 6 of the spiral steel belt structure and the buffer cavity 8 in the filler can provide sufficient buffering and support when the cable 1 is subjected to external impact or internal temperature changes, thereby preventing the cable 1 from cracking. The use of low-smoke halogen-free flame retardant materials further enhances the durability and safety of the cable 1, and can effectively prevent the occurrence of safety accidents such as fire even if the cable 1 is damaged.

[0024] In some optional specific embodiments, such as Figures 1 to 4 As shown, a buffer cavity 8 is opened inside the filler 4, and the number of the buffer cavities 8 is four. The outer periphery of the filler 4 is wrapped with the insulating layer 3, and a buffer cavity 8 is provided inside it, which can effectively buffer external impact force and reduce the risk of cracking of the cable 1.

[0025] In some optional specific embodiments, such as Figures 1 to 4 As shown, the protective layer 6 is a spiral steel belt structure. The protective layer 6 is designed to be a spiral steel belt structure, which not only enhances the mechanical strength of the cable 1, but also improves the protective performance of the cable 1.

[0026] In some optional specific embodiments, such as Figures 1 to 4 As shown, the inner sheath 5 and the outer sheath 7 are both made of low-smoke halogen-free flame retardant material, have good flame retardant properties, and provide an additional layer of protection.

[0027] In some optional specific embodiments, such as Figures 1 to 4 As shown, there are four cables 1 , and a reinforcing core 9 is provided inside the cables 1 .

[0028] In some optional specific embodiments, such as Figures 1 to 4 As shown, the cable shielding layer 2 is made of copper wires, and its main function is to shield electromagnetic interference and improve the anti-interference ability of the cable 1.

[0029] In some optional specific embodiments, such as Figures 1 to 4 As shown, the insulating layer 3 is made of polyvinyl chloride. The insulating layer 3 is made of polyvinyl chloride and has good insulation performance, ensuring that the cable 1 will not cause safety problems due to short circuits and other reasons when transmitting electric energy.

[0030] The working principle of the present invention: the material selection of the insulating layer 3, the inner sheath 5 and the outer sheath 7, and the high-temperature resistant material in the filler 4, together ensure the stability and safety of the cable 1 in a high-temperature environment. The design of the spiral steel belt structure of the buffer cavity 8 and the protective layer 6 can effectively isolate the heat through the specific structural design and material selection when heat is generated inside the cable 1, and prevent the cable 1 from cracking due to high temperature. The protective layer 6 of the spiral steel belt structure and the buffer cavity 8 in the filler can provide sufficient buffering and support when the cable 1 is subjected to external impact or internal temperature changes, and prevent the cable 1 from cracking. The use of low-smoke halogen-free flame retardant materials further enhances the durability and safety of the cable 1, and can effectively prevent the occurrence of safety accidents such as fire even if the cable 1 is damaged.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0032] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A high temperature resistant and crack resistant overhead insulated cable, characterized in that: include: Cable (1); A cable shielding layer (2), the cable shielding layer (2) being arranged at the outer end of the cable (1); An insulating layer (3), the insulating layer (3) being wrapped around the outside of the cable shielding layer (2); Filler (4), the filler (4) is filled around the outer periphery of the insulating layer (3); An inner sheath (5), the inner sheath (5) being arranged on the outer periphery of the insulating layer (3); A protective layer (6), the protective layer (6) being arranged on the outer periphery of the inner sheath (5); An outer sheath (7), the outer sheath (7) being arranged on the outer periphery of the protective layer (6); A buffer cavity (8), wherein the buffer cavity (8) is opened inside the filler (4), and the number of the buffer cavities (8) is four.

2. A high temperature resistant and crack resistant overhead insulated cable according to claim 1, characterized in that: The protective layer (6) is a spiral steel belt structure.

3. A high temperature resistant and crack resistant overhead insulated cable according to claim 2, characterized in that: The inner sheath (5) and the outer sheath (7) are both made of low-smoke, halogen-free, and flame-retardant materials.

4. A high temperature resistant and crack resistant overhead insulated cable according to claim 3, characterized in that: A reinforcing core (9), wherein the reinforcing core (9) is arranged inside the cable (1), and the number of the cable (1) is four.

5. A high temperature resistant and crack resistant overhead insulated cable according to claim 4, characterized in that: The cable shielding layer (2) is made of copper wires.

6. A high temperature resistant and crack resistant overhead insulated cable according to claim 5, characterized in that: The insulating layer (3) is made of polyvinyl chloride.

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