Multi-cable-core anti-corrosion shore power cable

Abstract

The utility model discloses a multi-cable-core anti-corrosion shore power cable which sequentially comprises an outer sheath, a waterproof layer, an outer flame-retardant layer, an outer fireproof layer and a wrapping layer from outside to inside, and four first cable cores and a second cable core are arranged in the wrapping layer. According to the shore power cable, the outer surfaces of the outer sheath, the first inner sheath and the second inner sheath are all coated with the corrosion-resistant layers, and the tin-plated annealed copper conductors can effectively improve the corrosion resistance of the conductors, so that the service life of the cable in a corrosive environment can be prolonged, and the performance stability of the cable in the corrosive environment can be improved. The arrangement of the outer flame-retardant layer, the outer fire-resistant layer, the first inner fire-resistant layer and the second inner fire-resistant layer greatly improves the flame-retardant and fire-resistant performance of the cable. The colors of the first inner sheaths of the four first cable cores and the colors of the two second insulating layers of the second cable cores are different in pairs, so that later maintenance is facilitated, and maintenance personnel can quickly find corresponding core wires.

Description

Technical Field

[0001] The utility model relates to the field of cables, and more specifically to a multi-core corrosion-resistant shore power cable. Background Art

[0002] Shore power cables are used to connect the power supply systems between port facilities and ships. Through shore power cables, ships moored at a pier or dock can access power from the shore grid, meeting the power needs of their internal equipment and systems.

[0003] Existing shore power cables lack corrosion resistance and are prone to corrosion in corrosive environments, leading to damage to the cable's outer sheath and exposure of the internal metal, potentially causing electrical failures or safety hazards. While some cables employ certain anti-corrosion measures, such as applying a corrosion-resistant coating to the outer sheath, these single anti-corrosion measures are insufficient to meet the demands of actual cable use. After long-term use, once the corrosion-resistant coating breaks or fails, the outer sheath can be corroded and damaged. Some cables are prone to ignition in the event of a fire, and the fire spreads rapidly, increasing the destructiveness and danger of fires. While some cables employ certain fire prevention measures, these are often limited to a single fireproofing structure, making it difficult to achieve comprehensive flame retardancy and fire resistance. Furthermore, multi-core cables contain numerous cores, each of which is not clearly distinguishable. This makes it difficult to quickly and accurately locate the corresponding core during maintenance, requiring increased time and effort to individually identify and confirm the location of each core, increasing the difficulty and time cost of maintenance. Utility Model Content

[0004] The utility model aims to overcome the defects of the prior art and provides a multi-core corrosion-resistant shore power cable.

[0005] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a shore power cable, comprising, from the outside to the inside, an outer sheath, a water-blocking layer, an outer flame-retardant layer, an outer fire-resistant layer and a wrapping layer, four first cable cores and one second cable core are arranged in the wrapping layer, the four first cable cores surround the second cable core, the first cable core comprises, from the inside to the outside, a first conductor, a first inner fire-resistant layer, a first insulating layer and a first inner sheath, the second cable core comprises a second inner sheath and a filling layer located in the second inner sheath, the filling layer has two twisted cores, the core comprises, from the inside to the outside, a second conductor, a second inner fire-resistant layer and a second insulating layer, the outer surface of the outer sheath, the outer surface of the first inner sheath and the outer surface of the second inner sheath are all coated with a corrosion-resistant layer, the first conductor and the second conductor are both tinned annealed copper conductors, and the colors of the first inner sheaths of the four first cable cores and the two second insulating layers of the second cable cores are different from each other.

[0006] Furthermore, the first inner refractory layer and the second inner refractory layer are both formed by wrapping mica tape.

[0007] Therefore, the fire resistance of the cable is better.

[0008] Furthermore, the first inner sheath and the second inner sheath are both polyethylene inner sheaths.

[0009] Thus it has better insulation, corrosion resistance and mechanical properties.

[0010] Furthermore, the outer flame retardant layer is a ceramic silicone rubber layer.

[0011] Thereby improving the flame retardant effect of the cable.

[0012] Furthermore, the water-blocking layer is a water-blocking adhesive layer.

[0013] Therefore, the cable has a better water-blocking effect.

[0014] Furthermore, the outer sheath is made of polyvinyl chloride material.

[0015] Thus it has good mechanical properties and corrosion resistance.

[0016] Furthermore, the corrosion-resistant layer is made of epoxy resin paint or phenolic resin paint.

[0017] Thereby enhancing the corrosion resistance of the cable.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The shore power cable of the present application has a corrosion-resistant layer coated on the outer surfaces of the outer sheath, the first inner sheath and the second inner sheath, and the tinned annealed copper conductor can effectively improve the corrosion resistance of the conductor, thereby improving the service life and performance stability of the cable in a corrosive environment.

[0020] 2. The shore power cable of the present application has an outer flame retardant layer, an outer fire resistant layer, a first inner fire resistant layer, and a second inner fire resistant layer, which greatly improves the flame retardant and fire resistant properties of the cable, thereby reducing losses in the event of a fire.

[0021] 3. In the shore power cable of the present application, the colors of the first inner sheaths of the four first cable cores and the two second insulation layers of the second cable cores are different from each other, which facilitates later maintenance, helps maintenance personnel quickly find the corresponding core wires, and improves the safety of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of cable structure;

[0023] Figure 2 This is an enlarged view of area A;

[0024] Figure 3 This is a cross-sectional view of the cable structure.

[0025] Explanation of the accompanying drawings: outer sheath 1; water-blocking layer 2; outer flame-retardant layer 3; outer fire-resistant layer 4; sheath 5; first cable core 6; first conductor 6.1; first inner fire-resistant layer 6.2; first insulating layer 6.3; first inner sheath 6.4; second cable core 7; second conductor 7.1; second inner fire-resistant layer 7.2; second insulating layer 7.3; filling layer 7.4; second inner sheath 7.5. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The utility model provides Figure 1-3 The multi-core corrosion-resistant shore power cable shown in the figure comprises, from the outside to the inside, an outer sheath 1, a water-blocking layer 2, an outer flame-retardant layer 3, an outer fire-resistant layer 4, and a wrapping layer 5. Four first cable cores 6 and one second cable core 7 are arranged in the wrapping layer 5. The four first cable cores 6 surround the second cable core 7. The first cable core 6 comprises, from the inside to the outside, a first conductor 6.1, a first inner fire-resistant layer 6.2, a first insulating layer 6.3, and a first inner sheath 6.4. The second cable core 7 comprises a second inner sheath 7.5 and a filling layer 7 located in the second inner sheath 7.5. .4, the filling layer 7.4 has two twisted cores, which include a second conductor 7.1, a second inner fire-resistant layer 7.2 and a second insulating layer 7.3 from the inside to the outside. The outer surface of the outer sheath 1, the outer surface of the first inner sheath 6.4 and the outer surface of the second inner sheath 7.5 are all coated with a corrosion-resistant layer. The first conductor 6.1 and the second conductor 7.1 are both tinned annealed copper conductors. The colors of the first inner sheaths 6.4 of the four first cable cores 6 and the two second insulating layers 7.3 of the second cable cores 7 are different from each other.

[0028] The first inner fire-resistant layer 6.2 and the second inner fire-resistant layer 7.2 are both wrapped with mica tape. The first inner sheath 6.4 and the second inner sheath 7.5 are both polyethylene inner sheaths. The outer flame-retardant layer 3 is a ceramic silicone rubber layer. The water-blocking layer 2 is a water-blocking adhesive layer. The outer sheath 1 is made of polyvinyl chloride. The corrosion-resistant layer is made of epoxy resin paint or phenolic resin paint.

[0029] Working principle: The shore power cable of the present application is coated with a corrosion-resistant layer on the outer surfaces of the outer sheath, the first inner sheath and the second inner sheath, and the tinned annealed copper conductor can effectively improve the corrosion resistance of the conductor, thereby improving the service life and performance stability of the cable in a corrosive environment. The provision of the outer flame retardant layer, the outer fire-resistant layer, the first inner fire-resistant layer and the second inner fire-resistant layer greatly improves the flame retardant and fire-resistant properties of the cable, thereby reducing losses in the event of a fire. In addition, the colors of the first inner sheaths of the four first cable cores and the two second insulating layers of the second cable core are different from each other, which facilitates later maintenance, helps maintenance personnel quickly find the corresponding core wires, and improves the safety of the cable.

[0030] During the specific preparation, first, the outer surface of the first and second inner sheaths of the prepared first and second cable cores are coated with epoxy resin paint or phenolic resin paint to improve the corrosion resistance of the cable cores. Then, the four first cable cores are distributed around the second cable core, and the cable cores are wrapped with a wrapping material to form a wrapping layer to enhance the integrity and protection between the cable cores. Then, an outer fire-resistant layer is prepared outside the wrapping layer to further improve the fire resistance of the cable. Then, an outer flame-retardant layer is prepared outside the outer fire-resistant layer to improve the flame-retardant performance of the cable. Then, a water-blocking adhesive layer is prepared outside the outer flame-retardant layer to ensure that the cable has good water-blocking performance. Then, an outer sheath is extruded outside the water-blocking layer to ensure the mechanical strength, corrosion resistance and overall protection of the cable. Finally, epoxy resin paint or phenolic resin paint is coated on the outer surface of the outer sheath to improve the service life and performance stability of the cable in a corrosive environment.

[0031] Although the present invention has been illustrated and described with respect to preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. A multi-core anti-corrosion shore power cable, characterized in that: From the outside to the inside, it includes an outer sheath, a water-blocking layer, an outer flame-retardant layer, an outer fire-resistant layer and a wrapping layer. Four first cable cores and one second cable core are arranged in the wrapping layer. The four first cable cores surround the second cable core. The first cable core includes a first conductor, a first inner fire-resistant layer, a first insulating layer and a first inner sheath from the inside to the outside. The second cable core includes a second inner sheath and a filling layer located in the second inner sheath. There are two twisted cores in the filling layer. The core includes a second conductor, a second inner fire-resistant layer and a second insulating layer from the inside to the outside. The outer surface of the outer sheath, the outer surface of the first inner sheath and the outer surface of the second inner sheath are all coated with a corrosion-resistant layer. The first conductor and the second conductor are both tinned annealed copper conductors. The colors of the first inner sheaths of the four first cable cores and the two second insulating layers of the second cable cores are different from each other.

2. The multi-core corrosion-resistant shore power cable according to claim 1, characterized in that: The first inner fire-resistant layer and the second inner fire-resistant layer are both formed by wrapping mica tape.

3. The multi-core anti-corrosion shore power cable according to claim 1, characterized in that: The first inner sheath and the second inner sheath are both polyethylene inner sheaths.

4. The multi-core anti-corrosion shore power cable according to claim 1, characterized in that: The outer flame retardant layer is a ceramic silicone rubber layer.

5. The multi-core anti-corrosion shore power cable according to claim 1, characterized in that: The water-blocking layer is a water-blocking adhesive layer.

6. The multi-core anti-corrosion shore power cable according to claim 1, characterized in that: The outer sheath is made of polyvinyl chloride material.

7. The multi-core anti-corrosion shore power cable according to claim 1, characterized in that: The corrosion-resistant layer is made of epoxy resin paint or phenolic resin paint.

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