Pressure-resistant cross-linked polyethylene power cable

Abstract

The utility model discloses a pressure-resistant cross-linked polyethylene power cable which comprises an outer sheath, an armor layer, an oxygen isolation inner protection layer and a flame-retardant wrapping tape layer which are sequentially arranged from outside to inside, and a pressure-resistant cable core, a plurality of power cable cores and a plurality of interval units are arranged in the flame-retardant wrapping tape layer. According to the power cable, the oxygen isolation inner protection layer effectively prevents oxygen permeation and delays aging of the cable, and the flame-retardant belting layer improves the fireproof performance of the cable. The multiple surrounding plate bodies surround the pressure-resistant cable core, and the spacing plate bodies play a role in separating and fixing the power cable core, so that the pressure-resistant capability of the cable is improved, and the overall structure of the cable is more compact and stable. In addition, the insulating layer is made of the cross-linked polyethylene material, so that the cable has good insulating performance, short circuit can be effectively prevented, the safety and reliability of the cable are improved, and power transmission is stable and efficient.

Description

Technical Field

[0001] The utility model relates to the field of cables, and more specifically, to a voltage-resistant cross-linked polyethylene power cable. Background Art

[0002] Power cables play a crucial role in power transmission and power distribution. As the core infrastructure of modern society, power cables not only provide reliable power supply for households and enterprises, but also support the normal operation of multiple fields such as industry, transportation, and communication.

[0003] For existing power cables, their voltage resistance performance is not good. Especially when used in an environment where the cable is often subjected to external pressure, if the internal structure of the cable is loose and lacks effective support and voltage resistance measures, the cable is prone to deformation or damage when stressed. The insulating layer materials of some power cables are not properly selected, resulting in poor insulation performance and easy occurrence of current leakage or short circuit phenomena. In addition, some power cables have defects in flame retardancy and fire prevention performance. Once a fire occurs, the fire will quickly spread to the entire cable system, causing serious consequences. Summary of the Utility Model

[0004] The utility model aims to overcome the defects of the prior art and provides a voltage-resistant cross-linked polyethylene power cable.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A power cable includes an outer sheath, an armor layer, an oxygen-isolating inner sheath, and a flame-retardant tape layer arranged in sequence from outside to inside. There is a voltage-resistant cable core, multiple power cable cores, and multiple spacer units inside the flame-retardant tape layer. The cross-section of the voltage-resistant cable core is circular, and the cross-section of the power cable core is fan-shaped. The number of power cable cores is the same as that of the spacer units. The spacer unit includes a support skeleton and a rubber coating covering the support skeleton. The support skeleton includes an enclosing plate body and a spacer plate body. Multiple enclosing plate bodies enclose the voltage-resistant cable core, and there is a spacer plate body between adjacent two power cable cores. The rubber coating includes a first coating part covering the enclosing plate body, a second coating part covering the spacer plate body, and two filling parts connected to the second coating part. The two filling parts can respectively abut against adjacent two power cable cores. Both sides of the second coating part have multiple strip-shaped positioning protrusions. The power cable core includes a conductor and an insulating layer covering the conductor. The insulating layer is a cross-linked polyethylene insulating layer, and strip-shaped positioning grooves matching the strip-shaped positioning protrusions are provided at the insulating layer.

[0006] Further, the armor layer is a steel tape armor layer.

[0007] Thereby improving the mechanical performance of the cable.

[0008] Further, the outer sheath is made of polyethylene material.

[0009] Further, there are four of the spacing units and four of the power cable cores.

[0010] Further, the voltage-resistant cable core includes a foamed material cladding and four voltage-resistant wire cores wrapped by the foamed material cladding. The cross-section of the voltage-resistant wire core is a quarter circle, and the voltage-resistant wire core is made of PVC material.

[0011] Thereby, the voltage-resistant ability of the cable is further improved.

[0012] Further, the support skeleton is made of PVC material and is integrally extrusion-molded.

[0013] Thereby, the support skeleton has good insulation performance and can also improve the overall structural strength of the cable.

[0014] Further, the rubber cladding is integrally extrusion-molded.

[0015] Thereby, the rubber cladding has great structural strength.

[0016] Further, the support skeleton extends along the length direction of the power cable, and the strip-shaped positioning protrusion extends along the length direction of the power cable.

[0017] Thereby, continuous support is provided for the power cable cores inside the cable. The strip-shaped positioning protrusion cooperates with the strip-shaped positioning groove, thereby ensuring that the power cable cores are fixed and accurately positioned inside the cable, and preventing dislocation or deviation during subsequent processing or use.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. For the power cable of the present application, the oxygen-isolating inner sheath effectively prevents the penetration of oxygen, delays the aging of the cable, and the flame-retardant tape layer improves the fire-proof performance of the cable.

[0020] 2. For the power cable of the present application, the voltage-resistant cable core is located at the center of the cable and is surrounded by multiple surrounding plate bodies, and the spacer plate body plays a role in separating and fixing the power cable cores, thereby improving the voltage-resistant ability of the cable and making the overall structure of the cable more compact and stable.

[0021] 3. For the power cable of the present application, the insulating layer uses cross-linked polyethylene material, so that the cable has good insulation performance, can effectively prevent current leakage and short circuit, improve the safety and reliability of the cable, and thus the power transmission is stable and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the power cable;

[0023] Figure 2 It is a sectional view of a power cable;

[0024] Figure 3 It is a schematic diagram of component separation within the flame-retardant tape layer;

[0025] Figure 4 It is an enlarged view of Area A;

[0026] Figure 5 It is an enlarged view of Area B.

[0027] Explanation of reference numerals: Outer sheath 1; Armor layer 2; Oxygen-barrier inner sheath 3; Flame-retardant tape layer 4; Power cable core 5; Insulation layer 5.1; Conductor 5.2; Strip-shaped positioning groove 5.3; Voltage-resistant cable core 6; Voltage-resistant wire core 6.1; Foaming material cladding 6.2; Spacer unit 7; Enclosing plate body 7.1; Spacer plate body 7.2; First cladding part 7.3; Second cladding part 7.4; Filling part 7.5; Strip-shaped positioning protrusion 7.6. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] The present invention provides a voltage-resistant cross-linked polyethylene power cable as Figures 1-5 shown, which includes an outer sheath 1, an armor layer 2, an oxygen-barrier inner sheath 3, and a flame-retardant tape layer 4 arranged in sequence from outside to inside. There is a voltage-resistant cable core 6, multiple power cable cores 5, and multiple spacer units 7 within the flame-retardant tape layer 4. The cross-section of the voltage-resistant cable core 6 is circular, and the cross-section of the power cable core 5 is fan-shaped. The number of power cable cores 5 and spacer units 7 is the same. The spacer unit 7 includes a support framework and a rubber cladding covering the support framework. The support framework includes an enclosing plate body 7.1 and a spacer plate body 7.2. Multiple enclosing plate bodies 7.1 surround the voltage-resistant cable core 6, and there is a spacer plate body 7.2 between adjacent two power cable cores 5. The rubber cladding includes a first cladding part 7.3 covering the enclosing plate body 7.1, a second cladding part 7.4 covering the spacer plate body 7.2, and two filling parts 7.5 connected to the second cladding part 7.4. The two filling parts 7.5 can respectively abut against adjacent two power cable cores 5. Both sides of the second cladding part 7.4 have multiple strip-shaped positioning protrusions 7.6. The power cable core 5 includes a conductor 5.2 and an insulation layer 5.1 covering the conductor 5.2. The insulation layer 5.1 is a cross-linked polyethylene insulation layer, and there are strip-shaped positioning grooves 5.3 at the insulation layer 5.1 that cooperate with the strip-shaped positioning protrusions 7.6.

[0030] The armored layer 2 is a steel strip armored layer. The outer sheath 1 is made of polyethylene material. The voltage-resistant cable core 6 includes a foamed material cladding 6.2 and four voltage-resistant wire cores 6.1 wrapped by the foamed material cladding 6.2. The cross-section of the voltage-resistant wire core 6.1 is a quarter circle, and the voltage-resistant wire core 6.1 is made of PVC material. The support skeleton is made of PVC material and is integrally extrusion molded. The rubber cladding is integrally extrusion molded. The support skeleton extends along the length direction of the power cable, and the strip-shaped positioning protrusion 7.6 extends along the length direction of the power cable.

[0031] Working principle: For the power cable of this application, the oxygen isolation inner sheath effectively prevents the penetration of oxygen and delays the aging of the cable, and the flame-retardant tape layer improves the fire resistance of the cable. Multiple enclosing plates enclose the voltage-resistant cable core, and the spacer plates play a role in separating and fixing the power cable core, thereby improving the voltage resistance of the cable and making the overall structure of the cable more compact and stable. In addition, the insulating layer is made of cross-linked polyethylene material, so that the cable has good insulation performance, can effectively prevent short circuits, improve the safety and reliability of the cable, and thus the power transmission is stable and efficient.

[0032] During specific manufacturing, first, multiple spacer units are used to enclose the voltage-resistant cable core. Then, through the cooperation of the strip-shaped positioning protrusion and the strip-shaped positioning groove, the installation of multiple power cable cores is realized, and at the same time, the multiple spacer units stably wrap the voltage-resistant cable core. At this time, the two filling parts of the rubber cladding can respectively abut against two adjacent power cable cores, so that the spacer unit and the power cable core can be accurately positioned and closely fitted, enhancing the overall structural strength of the cable and avoiding loosening or dislocation caused by vibration or external force during the use of the cable. Then, the combined voltage-resistant cable core, power cable core, and spacer unit are wound together with the flame-retardant tape layer, and then the oxygen isolation inner sheath, steel strip armored layer, and outer sheath are successively manufactured.

[0033] Although the present utility model has been illustrated and described with respect to the preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present utility model as long as they do not exceed the scope defined by the claims of the present utility model.

Claims

1. A voltage-resistant cross-linked polyethylene power cable, characterized in that, It includes an outer sheath, an armor layer, an oxygen-isolating inner sheath, and a flame-retardant tape layer arranged in sequence from outside to inside. There is a pressure-resistant cable core, multiple power cable cores, and multiple spacer units inside the flame-retardant tape layer. The cross-section of the pressure-resistant cable core is circular, the cross-section of the power cable core is fan-shaped, and the number of power cable cores is the same as that of the spacer units. The spacer unit includes a support skeleton and a rubber coating layer covering the support skeleton. The support skeleton includes an enclosing plate body and a spacer plate body. Multiple enclosing plate bodies enclose the pressure-resistant cable core, and there is a spacer plate body between adjacent two power cable cores. The rubber coating layer includes a first coating part covering the enclosing plate body, a second coating part covering the spacer plate body, and two filling parts connected to the second coating part. The two filling parts can respectively abut against adjacent two power cable cores. Both sides of the second coating part have multiple strip-shaped positioning protrusions. The power cable core includes a conductor and an insulating layer covering the conductor. The insulating layer is a cross-linked polyethylene insulating layer, and there are strip-shaped positioning grooves at the insulating layer that cooperate with the strip-shaped positioning protrusions.

2. The voltage-resistant cross-linked polyethylene power cable according to claim 1, wherein The armor layer is a steel tape armor layer.

3. The pressure-resistant cross-linked polyethylene power cable according to claim 1, wherein The outer sheath is made of polyethylene material.

4. The voltage-resistant crosslinked polyethylene power cable according to claim 1, wherein, The pressure-resistant cable core includes a foamed material coating layer and four pressure-resistant wire cores wrapped by the foamed material coating layer. The cross-section of the pressure-resistant wire core is one-fourth circular, and the pressure-resistant wire core is made of PVC material.

5. The voltage-resistant cross-linked polyethylene power cable according to claim 1, characterized in that, The support skeleton is made of PVC material, and the support skeleton is integrally extrusion-molded.

6. The voltage-resistant cross-linked polyethylene power cable according to claim 1, wherein The rubber coating layer is integrally extrusion-molded.

7. The voltage-resistant cross-linked polyethylene power cable according to claim 1, wherein The support skeleton extends along the length direction of the power cable, and the strip-shaped positioning protrusions extend along the length direction of the power cable.

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