Shielding type outdoor power cable with good electromagnetic compatibility

Abstract

The utility model discloses a shielding type outdoor power cable with good electromagnetic compatibility, which comprises a cable core, the cable core is composed of five groups of wire cores, a first reinforcing rib, a second reinforcing rib, a filling layer and a second insulating layer, the wire cores are annularly distributed at equal intervals, an inner shielding layer is arranged outside the cable core, and an outer shielding layer is arranged outside the inner shielding layer. A composite shielding layer is arranged outside the inner shielding layer, a composite wear-resistant layer is arranged outside the composite shielding layer, and the structure solves the problems that the anti-shielding effect of the cable is not good enough, and the protection performance of the cable is not good enough.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a shielded outdoor power cable with good electromagnetic compatibility. Background Art

[0002] Shielded outdoor power cables feature a special structure. The cable's conductor is typically composed of multiple strands of copper or aluminum wire, offering excellent electrical conductivity. The cable's shielding layer is a key component, typically located outside the insulation layer. The shielding layer can be a metal mesh braid, metal film, or metal tape wrap. Shielded outdoor power cables are widely used in substations, power plants, industrial and mining enterprises, and urban power grids. Excellent electromagnetic compatibility is a key feature of shielded outdoor power cables.

[0003] For example, the Chinese patent "A shielded power cable" with announcement number CN220553312U includes a tensile steel wire shaft, a rubber outer protective layer and a high-fiber outer sheath arranged on the tensile steel wire shaft, and a wire core body surrounding the tensile steel wire shaft. The inner side of the high-fiber outer sheath is fixedly installed with equidistantly arranged flexible clips, and the flexible clips are distributed in a ring array around the tensile steel wire shaft. The inner side of the flexible clips is fixedly installed with equidistantly arranged shaping rings, and a slot is provided on the outer side of the shaping ring. A positioning hole is also provided inside the shaping ring. The slot and the shaping ring are adapted to each other, and a wire core hole is provided on the outer side of the positioning hole. The wire core holes are distributed in a ring array around the positioning hole. The tensile steel wire shaft passes through the entire positioning hole, and a rubber outer protective layer is provided on the outer side of the tensile steel wire shaft. The outer side of the rubber outer protective layer A silicone corrugated layer is fixedly installed, and the surface of the silicone corrugated layer is provided with bumps and depressions. A high-fiber outer covering layer is provided on the side of the rubber outer protective layer away from the silicone corrugated layer, and the high-fiber outer covering layers are cross-shaped. An insulating shielding layer is provided on the inner side of the high-fiber outer covering layer, and an insulating filling layer is filled on the inner side of the insulating shielding layer and between the shaping rings. Embedded joints are fixedly installed at both ends of the rubber outer protective layer, and one end of the embedded joint is fixedly connected to a cable body. The cable body includes a galvanized steel wire core, and a thermoplastic rubber tube is fixedly connected to the outside of the galvanized steel wire core. A copper tape inner shielding layer is fixedly connected to the surface of the thermoplastic rubber tube. The surface of the copper tape inner shielding layer is provided with a steel tape inner covering, and the outer side of the steel tape inner covering is wrapped with a rubber inner protective layer, and the surface of the rubber inner protective layer is sprayed with a polyvinyl chloride flame retardant layer.

[0004] The prior art can realize the use of the shielding type outdoor power cable, but in actual use, on the one hand, the anti-shielding effect of the cable is not good enough, usually only a shielding layer is wrapped outside the cable core, leading to signal interference of the cable in a strong magnetic environment, on the other hand, the protection performance of the cable is not good enough, the outdoor use cable is prone to damage due to friction, thereby shortening the service life of the cable, thus failing to meet the existing demand, and the shielding type outdoor power cable with good electromagnetic compatibility is provided. Content of the utility model

[0005] The utility model discloses a shielding type outdoor power cable with good electromagnetic compatibility, which solves the problems of poor anti-shielding effect and poor protection performance of the cable in the prior art.

[0006] To achieve the above object, the utility model provides the following technical scheme: a shielding type outdoor power cable with good electromagnetic compatibility, comprising a cable core, the cable core is composed of a wire core, a first reinforcing rib, a second reinforcing rib, a filling layer and a second insulating layer, the wire core is provided with five groups, and the wire core is annularly and equidistantly distributed, an inner shielding layer is arranged outside the cable core, a composite shielding layer is arranged outside the inner shielding layer, and a composite wear-resistant layer is arranged outside the composite shielding layer.

[0007] Preferably, the wire core is composed of a conductor and a first insulating layer, the conductor is twisted by a plurality of copper wires, and the conductor is provided with the first insulating layer outside.

[0008] Preferably, the first reinforcing rib is arranged at the center position of the five groups of wire cores, the second reinforcing rib is arranged outside the five groups of wire cores, and the first reinforcing rib, the second reinforcing rib, the wire core and the gap between the second insulating layer are provided with the filling layer.

[0009] Preferably, the composite shielding layer is composed of a shielding outer layer, a shielding reinforcing layer and a shielding skeleton layer, the shielding skeleton layer is wrapped outside the inner shielding layer, the shielding reinforcing layer is wrapped outside the shielding skeleton layer, and the shielding outer layer is sprayed outside the shielding reinforcing layer.

[0010] Preferably, the composite wear-resistant layer is composed of a wear-resistant outer layer, a wear-resistant inner layer and a wear-resistant base layer, the wear-resistant base layer is extruded outside the shielding outer layer, the wear-resistant inner layer is extruded outside the wear-resistant base layer, and the wear-resistant outer layer is extruded outside the wear-resistant inner layer.

[0011] Preferably, the first insulating layer and the second insulating layer are made of modified methylphenyl vinyl silicone rubber material.

[0012] Preferably, the first reinforcing rib and the second reinforcing rib are made of aramid fiber material.

[0013] Compared with the prior art, the utility model has the advantages of

[0014] 1, the utility model discloses a composite shielding layer can improve the anti -shield ability of cable core, the shielding outer layer that sets up can improve the conductivity of cable, shielding outer layer effectively increases the conductivity of cable, thereby reduces cable loss and voltage reduction, improves the transmission efficiency of electric energy, the shielding reinforcement layer that sets up can improve the anti - electromagnetic interference ability of cable, shielding reinforcement layer can prevent high -frequency electromagnetic wave and network conductor contact, produce inductive current, increase crosstalk, thereby guarantee the stability and reliability of signal, the shielding framework layer that sets up, strengthen the shielding effect of cable and also improved the anti -bending ability of cable, shielding framework layer can weaken or eliminate the influence of electromagnetic radiation to cable internal signal, ensure the intelligibility and stability of signal.

[0015] 2, the utility model discloses a composite wear -resisting layer can improve the protection performance of cable, the wear -resisting outer layer that sets up can improve the wear -resisting performance of cable, thereby avoid the situation that cable appears breakage due to the factor of outdoor environment, thereby prolongs the service life of cable, the wear -resisting inner layer that sets up can improve the corrosion -resistant performance of cable, avoid the interference of external environmental factor and lead to the aging of cable skin, the wear -resisting base layer that sets up can improve the antistatic performance of cable, wear -resisting base layer can improve the electromagnetic compatibility of cable to some extent, by reducing the static electricity accumulation on the surface of cable, wear -resisting base layer can reduce the generation and propagation of electromagnetic interference, improve the stability and reliability of cable in complex electromagnetic environment.

[0016] 3, the utility model discloses a first reinforcing rib and second reinforcing rib can improve the tenacity of cable core, if cable is bent, the first reinforcing rib and second reinforcing rib in the inside can effectively protect the conductor, first insulating layer and other components in the inside of cable from the damage of external mechanical stress, can also enhance the compression resistance of cable, prevent the deformation or damage of cable when being subjected to external pressure. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the external structure perspective drawing of the utility model;

[0018] Figure 2 It is the internal structure section view of the utility model;

[0019] Figure 3 It is the composite shielding layer internal structure partial close -up of the utility model;

[0020] Figure 4 It is the composite wear -resisting layer internal structure partial close -up of the utility model.

[0021] In the figure: 1. Cable core; 2. Wire core; 3. Conductor; 4. First insulation layer; 5. First reinforcement rib; 6. Second reinforcement rib; 7. Filling layer; 8. Second insulation layer; 9. Inner shielding layer; 10. Composite shielding layer; 1001. Shielding outer layer; 1002. Shielding reinforcement layer; 1003. Shielding skeleton layer; 11. Composite wear-resistant layer; 1101. Wear-resistant outer layer; 1102. Wear-resistant inner layer; 1103. Wear-resistant base layer. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-4 The utility model provides an embodiment: a shielded outdoor power cable with good electromagnetic compatibility, including a cable core 1, the cable core 1 is composed of a wire core 2, a first reinforcing rib 5, a second reinforcing rib 6, a filling layer 7 and a second insulating layer 8, the wire core 2 is provided in five groups, and the wire cores 2 are distributed in a ring-shaped and equidistant manner, an inner shielding layer 9 is provided on the outside of the cable core 1, a composite shielding layer 10 is provided on the outside of the inner shielding layer 9, a composite wear-resistant layer 11 is provided on the outside of the composite shielding layer 10, and the inner shielding layer 9 is made of conductive PVC material.

[0024] See also Figure 1 and Figure 2 The core 2 is composed of a conductor 3 and a first insulating layer 4. The conductor 3 is formed by twisting multiple copper wires. The first insulating layer 4 is provided on the outside of the conductor 3 to facilitate improving the conductive efficiency of the core 2 through the conductor 3.

[0025] See also Figure 1 and Figure 2 The first reinforcing rib 5 is arranged at the center position of the five groups of cores 2, and the second reinforcing rib 6 is arranged on the outside of the five groups of cores 2. A filling layer 7 is arranged between the first reinforcing rib 5, the second reinforcing rib 6, the core 2 and the second insulating layer 8. The filling layer 7 is made of glass fiber material, which facilitates improving the bending resistance of the cable core 1 through the filling layer 7.

[0026] See also Figure 2 and Figure 3The composite shielding layer 10 is composed of a shielding outer layer 1001, a shielding reinforcing layer 1002 and a shielding skeleton layer 1003, the shielding skeleton layer 1003 is wrapped outside the inner shielding layer 9, the shielding reinforcing layer 1002 is wrapped outside the shielding skeleton layer 1003, the shielding outer layer 1001 is sprayed outside the shielding reinforcing layer 1002, the shielding outer layer 1001 adopts graphite powder, the shielding reinforcing layer 1002 adopts magnetic composite aluminum foil, and the shielding skeleton layer 1003 adopts copper wire weaving, so as to improve the anti-shielding performance of the cable core 1 through the composite shielding layer 10.

[0027] Please refer to Figure 2 and Figure 4 The composite wear-resistant layer 11 is composed of a wear-resistant outer layer 1101, a wear-resistant inner layer 1102 and a wear-resistant base layer 1103, the wear-resistant base layer 1103 is extruded outside the shielding outer layer 1001, the wear-resistant inner layer 1102 is extruded outside the wear-resistant base layer 1103, and the wear-resistant outer layer 1101 is extruded outside the wear-resistant inner layer 1102, wherein the wear-resistant outer layer 1101 adopts nylon resin material, the wear-resistant inner layer 1102 adopts polytetrafluoroethylene material, and the wear-resistant base layer 1103 adopts short-cut conductive fiber material, so as to improve the protection performance of the cable through the composite wear-resistant layer 11.

[0028] Please refer to Figure 1 and Figure 2 The first insulating layer 4 and the second insulating layer 8 both adopt modified methyl phenyl vinyl silicone rubber material, the first insulating layer 4 is extruded outside the conductor 3, and the second insulating layer 8 is extruded outside the core 2, so as to improve the insulating performance of the cable core 1 through the first insulating layer 4 and the second insulating layer 8.

[0029] Please refer to Figure 1 and Figure 2 The first reinforcing rib 5 and the second reinforcing rib 6 both adopt aramid fiber material, so as to improve the toughness of the cable core 1 through the first reinforcing rib 5 and the second reinforcing rib 6.

[0030] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

Claims

1. A shielded outdoor power cable with good electromagnetic compatibility, comprising a cable core (1), characterized in that: The cable core (1) is composed of a wire core (2), a first reinforcing rib (5), a second reinforcing rib (6), a filling layer (7) and a second insulating layer (8); the wire core (2) is provided in five groups, and the wire cores (2) are distributed in an annular shape and at equal intervals; an inner shielding layer (9) is provided on the outside of the cable core (1); a composite shielding layer (10) is provided on the outside of the inner shielding layer (9); and a composite wear-resistant layer (11) is provided on the outside of the composite shielding layer (10).

2. A shielded outdoor power cable with good electromagnetic compatibility according to claim 1, characterized in that: The wire core (2) is composed of a conductor (3) and a first insulating layer (4); the conductor (3) is formed by twisting a plurality of copper wires; and the first insulating layer (4) is provided on the outside of the conductor (3).

3. A shielded outdoor power cable with good electromagnetic compatibility according to claim 2, characterized in that: The first reinforcing ribs (5) are arranged at the center of the five groups of wire cores (2), the second reinforcing ribs (6) are arranged outside the five groups of wire cores (2), and a filling layer (7) is provided between the first reinforcing ribs (5), the second reinforcing ribs (6), the wire cores (2) and the second insulating layer (8).

4. The shielded outdoor power cable with good electromagnetic compatibility according to claim 3, characterized in that: The composite shielding layer (10) is composed of a shielding outer layer (1001), a shielding reinforcement layer (1002), and a shielding skeleton layer (1003); the shielding skeleton layer (1003) is wrapped around the outside of the inner shielding layer (9); the shielding reinforcement layer (1002) is wrapped around the outside of the shielding skeleton layer (1003); and the shielding outer layer (1001) is sprayed on the outside of the shielding reinforcement layer (1002).

5. The shielded outdoor power cable with good electromagnetic compatibility according to claim 4, characterized in that: The composite wear-resistant layer (11) consists of a wear-resistant outer layer (1101), a wear-resistant inner layer (1102), and a wear-resistant base layer (1103); the wear-resistant base layer (1103) is extruded on the outside of the shielding outer layer (1001); the wear-resistant inner layer (1102) is extruded on the outside of the wear-resistant base layer (1103); and the wear-resistant outer layer (1101) is extruded on the outside of the wear-resistant inner layer (1102).

6. The shielded outdoor power cable with good electromagnetic compatibility according to claim 5, characterized in that: The first insulating layer (4) and the second insulating layer (8) are both made of modified methyl phenyl vinyl silicone rubber material.

7. The shielded outdoor power cable with good electromagnetic compatibility according to claim 6, characterized in that: The first reinforcing rib (5) and the second reinforcing rib (6) are both made of aramid fiber material.

Images