Pre-branched power cable for ship

Abstract

The utility model relates to the technical field of cable manufacturing, and provides a pre-branched power cable for ships, which comprises a conductor. The insulating layer coats the outer surface of the conductor; the copper wire braided shielding layer coats the outer side of the insulating layer and is used for inhibiting electromagnetic interference; the outer sheath covers the outer side of the shielding layer; one end of the branch cable and one end of the main cable are both inserted into the branch connector, and the branch connector is used for connecting the branch cable and the main cable; the sealant is filled in the branch joint and is used for sealing the joint of the branch cable and the main cable; the elastic filling material is filled in the cable and is used for enhancing the mechanical strength and the flexibility of the cable; wherein the copper wire braided shielding layer forms an effective shielding net, the electromagnetic compatibility when multiple strands of cables are parallel is improved, the branch joints are filled with the sealant, moisture and other corrosive media are prevented from invading the branch joints, and the elastic filling material enhances the mechanical strength and flexibility of the cable.

Description

Technical Field

[0001] This utility model belongs to the field of cable manufacturing technology, specifically relating to a pre-branched power cable for ships. Background Technology

[0002] With the rapid development of my country's modernization, the application of cables is becoming increasingly widespread. Among them, the ship's power system, as the core support for ship operation, directly affects the ship's navigation performance and operating costs due to its safety and maintenance efficiency. Power cables, as a key component of the ship's power distribution network, are responsible for transmitting electrical energy from the main switchboard to various subsystems (such as propulsion systems, navigation equipment, and lighting systems). However, existing ship power cables have significant drawbacks in the complex aquatic environment: insufficient mechanical strength makes them easily damaged; poor flexibility makes them prone to loosening at connection points under ship vibration; poor sealing leads to water seepage at branches, and moisture intrusion degrades insulation performance, causing short circuits or leakage; and severe electromagnetic interference, with multiple cables running in parallel causing electromagnetic compatibility problems that affect the stable operation of the power system. Utility Model Content

[0003] To address the aforementioned shortcomings of existing technologies, the technical problem to be solved by this utility model is as follows: a pre-branched power cable for ships is proposed, which forms an effective shielding mesh by setting a copper wire braided shielding layer to improve the electromagnetic compatibility of multiple cables running in parallel; sealant is filled inside the branch joint to prevent moisture and other corrosive media from entering the branch joint; and elastic material is filled inside the cable to enhance the mechanical strength and flexibility of the cable.

[0004] The technical solution adopted by this utility model to solve its technical problem is to propose a pre-branched power cable for ships, comprising:

[0005] conductor;

[0006] An insulating layer that covers the outer surface of the conductor;

[0007] A copper wire braided shielding layer is wrapped around the outside of the insulating layer to suppress electromagnetic interference;

[0008] An outer sheath that covers the outside of the shielding layer;

[0009] A branch connector is provided, in which one end of the branch cable and one end of the main cable are inserted. The branch connector is used to connect the branch cable and the main cable.

[0010] A sealant, which is filled into the branch joint, is used to provide a seal at the connection between the branch cable and the main cable;

[0011] An elastic filler material is used to fill the cable to enhance its mechanical strength and flexibility.

[0012] In the aforementioned pre-branched power cable for ships, the conductor is made of copper.

[0013] In the aforementioned pre-branched power cable for ships, the insulation layer is made of ethylene propylene rubber.

[0014] In the aforementioned pre-branched power cable for ships, the outer sheath is made of neoprene rubber.

[0015] In the aforementioned pre-branched power cable for ships, the material of the branch joint is oxygen-free copper.

[0016] In the aforementioned pre-branched power cable for ships, the branch joint is C-shaped.

[0017] In the aforementioned pre-branched power cable for ships, the elastic filler material is polyurethane.

[0018] In the aforementioned pre-branched power cable for ships, the braiding density of the copper wire braided shielding layer is not less than 85%.

[0019] In the aforementioned pre-branched power cable for ships, the sealant material is silicone.

[0020] In the aforementioned pre-branched power cable for marine applications, the cable is suitable for an operating temperature range of -40°C to +90°C.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The copper wire braided shielding layer forms an effective shielding mesh, which significantly reduces the interference of external electromagnetic fields on the internal conductors and reduces the electromagnetic interference of the cable to the surrounding equipment, thereby improving the electromagnetic compatibility of multiple cables running in parallel and ensuring the stable operation of the power system.

[0023] (2) The sealant is filled in the branch joint, providing reliable sealing protection and effectively preventing moisture, humidity and other corrosive media from entering the cable, avoiding short circuits or leakage problems caused by the deterioration of insulation performance.

[0024] (3) The elastic filler material is evenly filled inside the cable, which enhances the mechanical strength and flexibility of the cable, enabling it to better resist external physical damage and adapt to the environment of frequent ship vibration, avoiding loosening or fatigue damage of connection points due to vibration. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the scheme;

[0026] Figure 2 This is a schematic diagram of the connection between the main cable and the branch cable in this solution.

[0027] In the diagram, 1 is the conductor; 2 is the insulation layer; 3 is the copper wire braided shielding layer; 4 is the outer sheath; and 5 is the branch connector. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] like Figure 1 As shown, this solution mainly targets a pre-branched power cable for use in ship power systems. However, this power cable is not limited to use in ship power systems and can also be applied to other power systems, such as offshore platforms and facilities.

[0031] like Figure 1 and Figure 2 As shown, this solution discloses a pre-branched power cable for ships, comprising: a conductor 1; an insulation layer 2 covering the outer surface of the conductor 1; a copper wire braided shielding layer 3 covering the outside of the insulation layer 2 to suppress electromagnetic interference; an outer sheath 4 covering the outside of the shielding layer; a branch connector 5, in which one end of the branch cable and one end of the main cable are inserted, and the branch connector 5 is used for connecting the branch cable and the main cable; a sealant filling the branch connector 5 to provide a seal at the connection between the branch cable and the main cable; and an elastic filler material filling the cable to enhance its mechanical strength and flexibility.

[0032] Conductor 1 is the core part of the cable, responsible for transmitting electrical energy; Insulation layer 2 covers the outer surface of conductor 1, mainly to prevent current leakage and provide electrical isolation; Copper wire braided shielding layer 3 covers the outside of insulation layer 2 to form an effective shielding mesh, significantly reducing the impact of external electromagnetic interference on conductor 1, while also reducing the electromagnetic interference of the cable itself to external equipment, thereby improving the electromagnetic compatibility when multiple cables run in parallel; Outer sheath 4 covers the outside of the shielding layer, protecting the internal structure of the cable and preventing corrosion from external corrosive media; Sealant fills the branch joint 5, providing reliable sealing protection, preventing moisture and corrosive media from entering the branch joint 5, and avoiding short circuits or leakage problems caused by decreased insulation performance; Elastic filler material can be filled between insulation layer 2 and shielding layer and / or between shielding layer and outer sheath 4, to enhance the mechanical strength and flexibility of the cable, absorb vibration energy, reduce fatigue damage caused by ship vibration, and improve the tensile and compressive strength of the cable, ensuring its long-term stable operation in complex environments.

[0033] To reduce power transmission loss, conductor 1 is made of copper, which effectively reduces energy loss due to its excellent electrical conductivity.

[0034] Furthermore, the insulation layer 2 is made of ethylene propylene rubber (EPR). EPR has excellent weather resistance, resisting the effects of ultraviolet radiation, ozone, and extreme temperatures, making it ideal for outdoor use. It maintains its elasticity over a wide temperature range, typically suitable for operating environments from -40°C to +130°C. Due to its excellent electrical insulation properties, EPR is widely used as the insulation layer 2 in wires and cables. In addition, EPR possesses good physical and mechanical properties, including abrasion resistance and tear strength. These characteristics enable EPR, as the insulation layer 2, to operate stably under harsh conditions for extended periods, ensuring the safety and reliability of the cable. The mechanical protection provided by EPR helps enhance the overall durability of the cable and extend its service life.

[0035] Furthermore, the outer sheath 4 is made of neoprene rubber, a synthetic rubber produced by emulsion polymerization of chloroprene (2-chloro-1,3-butadiene). It possesses excellent weather resistance, resisting the effects of ultraviolet radiation, ozone, and extreme temperatures. Even in marine environments, it can maintain stable operation for extended periods when exposed to salt spray, humidity, and other harsh conditions. Neoprene rubber also maintains its physical properties over a wide temperature range, typically suitable for working environments from -40℃ to +100℃. In addition, neoprene rubber exhibits good tensile strength, abrasion resistance, and tear strength, making it suitable for applications requiring high mechanical properties. Application scenarios; This material can not only withstand stretching and bending operations during installation, but also effectively protect the internal structure from damage. In the marine environment, when faced with chemicals such as oils, acids, and alkalis, the chemical stability of neoprene rubber ensures that the outer sheath of the cable will not age or be damaged rapidly due to contact with these substances. Neoprene rubber also has a certain degree of flame retardancy, which is especially important in the marine environment where safety requirements are extremely high, and helps to improve the safety of the cable. Due to the above excellent comprehensive performance, neoprene rubber, as the outer sheath material, ensures the long-term stable operation of the cable under harsh conditions, while guaranteeing the safety and reliability of the cable.

[0036] Furthermore, the material of the branch connector 5 is oxygen-free copper. Oxygen-free copper is a high-purity copper material that is strictly controlled during the smelting process to reduce its oxygen content to an extremely low level (usually not exceeding 0.003% by mass) and to eliminate other impurity elements as much as possible. Due to its high purity, this material has excellent electrical and thermal conductivity. Using oxygen-free copper as the material of the branch connector 5 can not only ensure the efficient conductivity of the electrical connection point, but also enhance the corrosion resistance of the connector, which helps to improve the reliability and durability of the overall structure.

[0037] Furthermore, the branch connector 5 is C-shaped with an open design, meaning it can be installed or adjusted without cutting the cable or completely removing it from the existing system. This is highly advantageous for applications with limited space or requiring quick replacement and maintenance. Despite the open design, the C-shaped branch connector 5 provides effective physical protection for the internal connection points through the filling sealant, reducing the risk of intrusion of external substances such as water and dust, which could affect electrical performance. Therefore, the C-shaped design of the branch connector 5 is primarily for ease of installation and maintenance, while additional sealing technology supports the necessary mechanical protection and electrical performance requirements.

[0038] Furthermore, the elastic filler material is polyurethane, which can be filled between the insulation layer 2 and the shielding layer and / or between the shielding layer and the outer sheath 4. Polyurethane has high mechanical strength and abrasion resistance, making it very suitable for cable applications that require protection of the internal structure from external physical damage. In addition, polyurethane has good resistance to a variety of chemicals, including oils, aliphatic solvents, and weak acids and alkalis. Polyurethane materials can maintain their physical properties over a wide temperature range of -40°C to +90°C and exhibit good anti-aging properties. Using polyurethane as an elastic filler material and distributing it evenly between the relevant layers of the cable not only enhances the mechanical strength and flexibility of the cable but also optimizes its electrical performance, making it more suitable for use in harsh marine environments.

[0039] To effectively shield against external electromagnetic interference, the braiding density of the copper wire braided shielding layer 3 should be no less than 85%. High-density copper wire braiding not only more effectively blocks external electromagnetic interference but also reduces the radiation of internal signals to the outside world. A braiding density of 85% means the shielding layer has high coverage, thus providing excellent shielding performance, especially suitable for environments with stringent electromagnetic compatibility (EMC) requirements. While a higher braiding density does improve shielding effectiveness and mechanical strength, it may have some impact on the cable's flexibility. However, in practical applications, by employing specific braiding techniques and selecting appropriate materials, it is possible to maintain good flexibility and bendability of the cable without compromising shielding performance. For example, using fine-diameter copper wire or optimizing the braiding angle can simultaneously achieve high shielding effectiveness and good physical properties. Therefore, the design standard of a braiding density of no less than 85% for the copper wire braided shielding layer 3 ensures that the cable possesses both highly efficient electromagnetic interference suppression capabilities and sufficient mechanical protection, making it ideal for complex and harsh working environments such as those on ships.

[0040] Furthermore, the sealant material is silicone. After curing, silicone sealant is an excellent electrical insulator, which effectively prevents current leakage and provides reliable electrical isolation, thus ensuring the safe operation of cable joints. Silicone sealant has good adhesion and elasticity, allowing it to tightly adhere to the cable surface, forming an effective sealing layer that prevents moisture, humidity, and dust from entering the cable, avoiding electrical faults caused by environmental factors. Choosing silicone as the sealant material not only meets the requirements of cables in complex marine environments for water resistance, dustproofing, and corrosion resistance, but also significantly reduces the risk of short circuits and other electrical faults caused by moisture and contaminant intrusion. Therefore, silicone sealant ensures safe and reliable electrical connections and is particularly suitable for applications requiring high stability and durability.

[0041] Conductor 1 is made of highly conductive copper, which significantly reduces power transmission loss due to its excellent conductivity. Insulation layer 2 is made of ethylene propylene rubber, which remains stable over a wide temperature range of -40℃ to +130℃ due to its excellent weather resistance and electrical insulation properties, making it particularly suitable for outdoor use. Outer sheath 4 is made of neoprene rubber, which is especially suitable for resisting the effects of salt spray, moisture, and other corrosive substances in marine environments due to its excellent weather resistance and chemical stability, with an operating temperature range of -40℃ to +100℃. Branch connector 5 is made of oxygen-free copper and designed in a C-shape for easy installation and maintenance, while being sealed with silicone filling. The adhesive provides additional protection, ensuring high conductivity and corrosion resistance; the elastic filler material, made of polyurethane, is uniformly filled between the insulation layer 2 and the shielding layer and / or between the shielding layer and the outer sheath 4, which not only improves the cable's mechanical strength and flexibility but also enhances its resistance to vibration and compression; the sealant is made of silicone, which, due to its excellent adhesion and elasticity, provides reliable electrical isolation and waterproof and dustproof functions after curing, making it particularly suitable for complex and variable marine environments; these properties work together to enable the cable in this solution to operate in a temperature range of -40°C to +90°C, ensuring stable operation in various harsh environments.

[0042] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0044] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A pre-branching power cable for a ship, characterized in that, The cable comprises: a conductor; an insulating layer covering the outer surface of the conductor; a copper wire braided shielding layer covering the outside of the insulating layer for suppressing electromagnetic interference; an outer sheath covering the outside of the shielding layer; a branch joint into which one end of a branch cable and one end of a main cable are inserted, the branch joint being used for connecting the branch cable and the main cable; a sealant filled in the branch joint for providing sealing to the connection between the branch cable and the main cable; an elastic filling material filled in the cable for enhancing the mechanical strength and flexibility of the cable.

2. The pre-branched power cable for a marine vessel according to claim 1, characterized in that, The material of the conductor is copper.

3. The pre-branched power cable for a marine vessel according to claim 1, characterized in that, The material of the insulating layer is ethylene-propylene rubber.

4. The pre-branched power cable for a marine vessel according to claim 1, characterized by, The material of the outer sheath is chloroprene rubber.

5. The pre-branched power cable for a marine vessel of claim 1, wherein, The material of the branch joint is oxygen-free copper.

6. The pre-branched power cable for a marine vessel of claim 1, wherein, The shape of the branch joint is C-shaped.

7. The pre-branched power cable for a marine vessel of claim 1, wherein, The elastic filling material is polyurethane.

8. The pre-branched power cable for a marine vessel of claim 1, wherein, The braiding density of the copper wire braided shielding layer is not less than 85%.

9. The pre-branched power cable for a marine vessel of claim 1, wherein, The material of the sealant is silicone.

10. The pre-branched power cable for a marine vessel of claim 1, wherein, The cable is suitable for a working temperature range of -40℃ to +90℃.

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