Tensile flame-retardant insulated overhead cable

Abstract

The utility model discloses a tensile flame-retardant insulation type aerial cable, relates to the technical field of aerial cable structures, and aims to solve the problems that the flame-retardant insulation effect of the existing aerial cable is poor, and the use of the cable is possibly affected due to poor flame-retardant and insulation effects in the electric energy transmission process. The cable core comprises a plurality of wire cores, a filling layer and a reinforcing steel wire, the reinforcing steel wire is arranged in the center of the cable core, the filling layer is arranged in a gap between the cable cores, the wire core comprises a conductor, an inner shielding layer and an insulating sheath, the inner shielding layer is arranged outside the conductor, the insulating sheath is arranged outside the inner shielding layer, and the insulating sheath is arranged outside the inner shielding layer. A belting layer is arranged outside the cable core, a metal wire shielding layer is arranged outside the belting layer, an outer insulating layer is arranged outside the metal wire shielding layer, a flame-retardant layer is arranged outside the outer insulating layer, an armor layer is arranged outside the flame-retardant layer, and an outer sheath is arranged outside the armor layer.

Description

Technical Field

[0001] The utility model relates to the technical field of overhead cable structures, and particularly relates to a tensile, flame-retardant and insulating overhead cable. Background Technique

[0002] An overhead 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 power transmission method between overhead conductors and underground cables. The overhead cable can greatly reduce various short-circuit faults. Therefore, the use effect of the overhead cable is very good. During the use of the overhead cable, it needs to have certain flame-retardant and insulating properties, so that the overhead cable can work in different environments.

[0003] After retrieval, the authorized announcement number is CN212990756U, which discloses a flame-retardant and insulating overhead cable, including a plurality of telescopic electric poles and a cable body arranged on the plurality of telescopic electric poles; the cable body includes a load-carrying conductor and a heat-insulating layer, a lightning protection layer, and a flame-retardant layer arranged in sequence, and the flame-retardant layer is located on the outermost side. The load-carrying conductor includes a plurality of buffer balls, a cable core, and an insulating layer arranged outside the cable core. The plurality of buffer balls are evenly distributed on the surface of the insulating layer; the telescopic electric pole includes a telescopic joint rod, a hydraulic device, and a ground anchor. The hydraulic device is fixed at the top of the ground anchor. The hydraulic device is arranged at the output end of the hydraulic pedal, and a hydraulic pedal is also arranged on the hydraulic device, solving the problem that the overhead cable in the prior art cannot effectively prevent fire due to poor flame retardancy.

[0004] However, the existing overhead cables have poor flame-retardant and insulating effects, which may affect the use of the cables during the power transmission process due to poor flame retardancy and insulation. Therefore, there is an urgent need in the market for a tensile, flame-retardant and insulating overhead cable to solve these problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a tensile, flame-retardant and insulating overhead cable to solve the problem that the existing overhead cables have poor flame-retardant and insulating effects, which may affect the use of the cables during the power transmission process due to poor flame retardancy and insulation as mentioned in the above background technique.

[0006] To achieve the above object, the utility model provides the following technical solutions: a tensile, flame-retardant and insulating overhead cable, comprising a cable core, the cable core including a plurality of wire cores, a filling layer and reinforcing steel wires, the reinforcing steel wires being disposed at the center of the cable core, the filling layer being disposed at the gap between the cable cores, the wire core including a conductor, an inner shielding layer and an insulating sheath, the inner shielding layer being disposed outside the conductor, the insulating sheath being disposed outside the inner shielding layer, a tape layer being disposed outside the cable core, a metal wire shielding layer being disposed outside the tape layer, an outer insulating layer being disposed outside the metal wire shielding layer, a flame-retardant layer being disposed outside the outer insulating layer, an armor layer being disposed outside the flame-retardant layer, and an outer sheath being disposed outside the armor layer.

[0007] Preferably, the filling layer is made of flame-retardant PP material.

[0008] Preferably, the tape layer is wound and woven by mica tape.

[0009] Preferably, the metal wire shielding layer is cross-woven by a plurality of metal wires.

[0010] Preferably, the outer insulating layer includes a polyethylene layer and an insulating coating layer, the insulating coating layer being coated outside the polyethylene layer, and the thickness of the insulating coating layer being 0.2 mm - 0.4 mm.

[0011] Preferably, the flame-retardant layer includes a polyvinyl chloride inner layer, a glass fiber layer, a polyvinyl chloride outer layer and a fireproof coating layer, the glass fiber layer being disposed outside the polyvinyl chloride inner layer, the glass fiber layer being wound and woven by a plurality of glass fiber ropes, the polyvinyl chloride outer layer being disposed outside the glass fiber layer, the fireproof coating layer being disposed outside the polyvinyl chloride outer layer, and the thickness of the fireproof coating layer being 0.3 mm - 0.5 mm.

[0012] Preferably, the conductor is stranded by five copper wires, and six wire cores are provided.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] For this tensile, flame-retardant and insulating overhead cable, the polyethylene layer can make the outer insulating layer have good protection effect, the insulating coating layer can further improve the insulation effect of the outer insulating layer, the polyvinyl chloride outer layer and the polyvinyl chloride inner layer can make the flame-retardant layer have good flame-retardant effect, the glass fiber layer can make the flame-retardant layer have certain tensile resistance effect, and the glass fiber layer has good flame retardancy, so that the overhead cable can be well protected.

[0015] This kind of tensile-resistant, flame-retardant and insulated aerial cable has reinforcing steel wires inside the cable core, which can effectively improve the tensile resistance of the aerial cable, so that the aerial cable will not break during the pulling process. The wrapping layer woven by mica tape can wrap the cable core. At the same time, mica tape has good fire-resistant insulation performance. The metal wire shielding layer can protect the internal structure of the cable and prevent the inside of the cable from being interfered by the outside world, thus affecting the use of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall front view of the present utility model;

[0017] Figure 2 is the overall cross-sectional view of the present utility model;

[0018] Figure 3 is the cross-sectional view of the outer insulation layer of the present utility model;

[0019] Figure 4 is the cross-sectional view of the flame-retardant layer of the present utility model.

[0020] In the figure: 1, cable core; 2, wire core; 3, filling layer; 4, reinforcing steel wire; 5, conductor; 6, inner shielding layer; 7, insulating sheath; 8, wrapping layer; 9, metal wire shielding layer; 10, outer insulation layer; 1001, polyethylene layer; 1002, insulating paint layer; 11, flame-retardant layer; 1101, inner layer of polyvinyl chloride; 1102, fiberglass layer; 1103, outer layer of polyvinyl chloride; 1104, fireproof paint layer; 12, armor layer; 13, outer sheath. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] Please refer to Figures 1-4, An embodiment provided by the present utility model: A tensile-resistant, flame-retardant, and insulating overhead cable, comprising a cable core 1. The cable core 1 includes multiple wire cores 2, a filling layer 3, and reinforcing steel wires 4. A reinforcing steel wire 4 is arranged at the center of the cable core 1, and a filling layer 3 is arranged at the gap between the cable cores 1. The wire core 2 includes a conductor 5, an inner shielding layer 6, and an insulating sheath 7. An inner shielding layer 6 is arranged outside the conductor 5, and an insulating sheath 7 is arranged outside the inner shielding layer 6. A tape layer 8 is arranged outside the cable core 1, a metal wire shielding layer 9 is arranged outside the tape layer 8, an outer insulating layer 10 is arranged outside the metal wire shielding layer 9, a flame-retardant layer 11 is arranged outside the outer insulating layer 10, an armor layer 12 is arranged outside the flame-retardant layer 11, and an outer sheath 13 is arranged outside the armor layer 12. It should be noted that, in order to save space and highlight the innovative elements of this patent, such as how to install the specific cable and the processes of spraying the insulating coating layer and the fireproof coating layer are not elaborated in this patent.

[0023] During use, the reinforcing steel wire 4 arranged inside the cable core 1 can effectively improve the tensile resistance of this kind of overhead cable, so that the overhead cable will not break during the pulling process. The tape layer 8 woven by winding mica tape can wrap the cable core 1. The arranged metal wire shielding layer 9 can protect the internal structure of the cable and prevent the inside of the cable from being interfered by the outside world. The arranged polyethylene layer 1001 can make the outer insulating layer 10 have a good protection effect. By coating the insulating coating layer 1002, the insulating effect of the outer insulating layer 10 can be further improved. By arranging a polyvinyl chloride outer layer 1103 and a polyvinyl chloride inner layer 1101, the flame-retardant layer 11 can have a good flame-retardant effect. By arranging a glass fiber layer 1102, the flame-retardant layer 11 can have a certain tensile resistance effect. Since the glass fiber layer 1102 has good flame retardancy, this can well protect the overhead cable.

[0024] Please refer to Figure 1 and Figure 2 , the filling layer 3 is made of flame-retardant PP material. By arranging the flame-retardant PP material, the filling layer 3 can have better flame-retardant and insulating properties.

[0025] Please refer to Figure 1 , the tape layer 8 is woven by winding mica tape. By using mica tape, it is convenient to wrap the cable core 1, and at the same time, mica tape has good fire-resistant and insulating properties.

[0026] Please refer to Figure 1 , the metal wire shielding layer 9 is woven by cross-weaving several metal wires. By arranging the metal wire shielding layer 9, the internal structure of the cable can be protected and the inside of the cable can be prevented from being interfered by the outside world, thus affecting the use of the cable.

[0027] Please refer to Figure 1 andFigure 3 The outer insulation layer 10 includes a polyethylene layer 1001 and an insulating paint layer 1002. The insulating paint layer 1002 is coated on the outside of the polyethylene layer 1001, and the thickness of the insulating paint layer 1002 is 0.2 mm - 0.4 mm. By providing the polyethylene layer 1001, the outer insulation layer 10 can have a good protection effect, and by coating the insulating paint layer 1002, the insulation effect of the outer insulation layer 10 can be further improved.

[0028] Please refer to Figure 1 and Figure 4 The flame retardant layer 11 includes a PVC inner layer 1101, a fiberglass layer 1102, a PVC outer layer 1103 and a fireproof paint layer 1104. The fiberglass layer 1102 is provided outside the PVC inner layer 1101. The fiberglass layer 1102 is wound and woven by a number of fiberglass ropes. The PVC outer layer 1103 is provided outside the fiberglass layer 1102, and the fireproof paint layer 1104 is provided outside the PVC outer layer 1103. The thickness of the fireproof paint layer 1104 is 0.3 mm - 0.5 mm. By providing the PVC outer layer 1103 and the PVC inner layer 1101, the flame retardant layer 11 can have a good flame retardant effect, and by providing the fiberglass layer 1102, the flame retardant layer 11 can have a certain tensile resistance effect, so that the overhead cable can be well protected.

[0029] Please refer to Figure 1 and Figure 2 The conductor 5 is stranded by five copper wires. There are six cores 2, which can make the structural strength of the conductor 5 higher and not easily break.

[0030] Working principle: When in use, a reinforcing steel wire 4 is provided inside the cable core 1, which can effectively improve the tensile resistance effect of the overhead cable, so that the overhead cable will not break during the pulling process. The tape layer 8 wound and woven by mica tape can wrap the cable core 1, and at the same time, the mica tape has good fireproof and insulating properties. By providing the metal wire shielding layer 9, the internal structure of the cable can be protected to prevent the inside of the cable from being interfered by the outside world, thus affecting the use of the cable. By providing the polyethylene layer 1001, the outer insulation layer 10 can have a good protection effect, and by coating the insulating paint layer 1002, the insulation effect of the outer insulation layer 10 can be further improved. By providing the PVC outer layer 1103 and the PVC inner layer 1101, the flame retardant layer 11 can have a good flame retardant effect, and by providing the fiberglass layer 1102, the flame retardant layer 11 can have a certain tensile resistance effect. Since the fiberglass layer 1102 has good flame retardancy, the overhead cable can be well protected.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A tensile-resistant, flame-retardant and insulating overhead cable, comprising a cable core (1), characterized in that: The cable core (1) includes a plurality of wire cores (2), a filling layer (3) and reinforcing steel wires (4). The reinforcing steel wires (4) are arranged at the center of the cable core (1). The filling layer (3) is arranged at the gap between cable cores (1). The wire core (2) includes a conductor (5), an inner shielding layer (6) and an insulating sheath (7). The inner shielding layer (6) is arranged outside the conductor (5). The insulating sheath (7) is arranged outside the inner shielding layer (6). A tape layer (8) is arranged outside the cable core (1). A wire mesh shielding layer (9) is arranged outside the tape layer (8). An outer insulating layer (10) is arranged outside the wire mesh shielding layer (9). A flame retardant layer (11) is arranged outside the outer insulating layer (10). An armor layer (12) is arranged outside the flame retardant layer (11). An outer sheath (13) is arranged outside the armor layer (12); The outer insulating layer (10) includes a polyethylene layer (1001) and an insulating paint layer (1002). The insulating paint layer (1002) is coated outside the polyethylene layer (1001). The thickness of the insulating paint layer (1002) is 0.2 mm - 0.4 mm.

2. The tensile flame-retardant insulated overhead cable according to claim 1, characterized in that: The filling layer (3) is made of flame retardant PP material.

3. The tensile, flame-retardant and insulating aerial cable according to claim 2, wherein: The tape layer (8) is woven by winding mica tape.

4. The tensile flame-retardant insulated overhead cable according to claim 3, wherein: The wire mesh shielding layer (9) is woven by crossing a number of metal wires.

5. The tensile and flame-retardant insulated overhead cable according to claim 4, characterized in that: The flame retardant layer (11) includes a PVC inner layer (1101), a glass fiber layer (1102), a PVC outer layer (1103) and a fireproof paint layer (1104). The glass fiber layer (1102) is arranged outside the PVC inner layer (1101). The glass fiber layer (1102) is woven by winding a number of glass fiber ropes. The PVC outer layer (1103) is arranged outside the glass fiber layer (1102). The fireproof paint layer (1104) is arranged outside the PVC outer layer (1103). The thickness of the fireproof paint layer (1104) is 0.3 mm - 0.5 mm.

6. The tensile, flame-retardant and insulating aerial cable according to claim 5, characterized in that: The conductor (5) is stranded by five copper wires. There are six wire cores (2).

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