A kind of marine corrosion resistant wire and cable based on ship

Abstract

The utility model relates to the technical field of seawater corrosion -resistant electric wire and cable, specifically disclose a kind of seawater corrosion -resistant electric wire and cable based on ship, including copper core, the outside of copper core is fixedly provided with insulating layer, the outside of insulating layer is provided with anticorrosive component, anticorrosive component includes two half annular anticorrosion shell, one end of half annular anticorrosion shell is provided with bending connecting component, two half annular anticorrosion shell are wrapped anticorrosion by bending connecting component to prevent corrosion, and two separate half annular anticorrosion shell are dismantled when maintaining repair.The utility model realizes the full-closed protection of cable by double half shell apposition structure, effectively insulates seawater soaking and salt fog erosion.Joint place is equipped with elastic sealing strip, and annular sealing structure is used in connecting end part, ensure that whole is completely sealed, prevent seawater stagnation or seep in joint place.

Description

Technical Field

[0001] This utility model relates to the field of seawater corrosion resistant wire and cable technology, specifically a seawater corrosion resistant wire and cable for ship applications. Background Technology

[0002] In marine environments such as those on ships, electrical wires and cables are constantly exposed to high salt spray, high humidity, and seawater splashes, making them highly susceptible to corrosion. This corrosion leads to decreased insulation performance, conductor damage, and affects the reliability of power and signal transmission, potentially causing safety accidents in severe cases. Therefore, effective corrosion protection for cables is of paramount importance.

[0003] To prevent seawater corrosion, some existing shipboard cables have an armor layer wrapped around the outside of the cable insulation layer. In cable production, the existing armor layer is generally spirally wound directly around the insulation layer by a high-speed wrapping machine. However, because the integrated armor layer has a continuous structure and high rigidity, it is prone to deformation and cracking due to "overall stress concentration" when bent. Therefore, this paper proposes a seawater corrosion resistant cable for shipboard applications. Utility Model Content

[0004] The purpose of this utility model is to provide a seawater corrosion resistant wire and cable for ships, in order to solve the problem mentioned in the background art that the integrated armor layer is prone to deformation and cracking due to "overall stress concentration" when bent because of its continuous structure and high rigidity.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a seawater corrosion resistant wire and cable for ships, comprising a copper core, an insulating layer fixedly sleeved on the outside of the copper core, and an anti-corrosion component disposed on the outside of the insulating layer. The anti-corrosion component comprises two semi-annular anti-corrosion shells, one end of which is provided with a bending connection component. The two semi-annular anti-corrosion shells wrap the cable to prevent corrosion through the bending connection component. The two separate semi-annular anti-corrosion shells can be disassembled during maintenance and repair.

[0006] The corrosion protection component also includes two connecting lugs fixedly installed at both ends of the semi-annular corrosion protection shell. The top of the connecting lugs is provided with a first screw hole that passes through the connecting lugs, and the internal thread of the first screw hole is provided with a bolt.

[0007] Among them, a semi-circular anti-corrosion shell has several micro drainage holes at the bottom of its interior that penetrate the semi-circular anti-corrosion shell, and several annular sealing grooves are opened inside the semi-circular anti-corrosion shell.

[0008] The annular sealing groove is fixedly equipped with an annular sealing rubber, and the two semi-annular anti-corrosion shells are fixedly equipped with a strip sealing rubber.

[0009] The bending connection assembly includes a bending connection pipe. Both ends of the bending connection pipe are fixedly provided with mating rings, one end of the mating ring is fixedly provided with a mating protrusion, and one end of the mating protrusion is fixedly provided with a sealing block. Both ends of the semi-annular anti-corrosion shell are provided with annular grooves.

[0010] One end of the mating protrusion is movably disposed inside the annular groove. Both sides of one end of the mating ring are provided with connecting grooves. A connecting block is fixedly disposed inside the connecting groove. A second screw hole is provided at the top of the connecting block. The connecting block is movably disposed between the two connecting lugs.

[0011] This utility model has at least the following beneficial effects: This invention utilizes two semi-annular protective shells that fit together to tightly enclose the cable's outer layer, forming a complete annular sealed cavity. This completely isolates the cable from the external environment, preventing electrochemical corrosion caused by prolonged exposure to seawater immersion or high salt spray conditions. A strip-shaped elastic seal is provided at the joint between the two shells; after assembly, it fits tightly under pressure, eliminating longitudinal gaps and preventing seawater from seeping in along the joint. Simultaneously, an annular sealing groove and sealing ring structure are provided at the ends of the protective shells, cooperating with the sealing head of the flexible connecting pipe to achieve complete axial sealing at the inter-section connection, eliminating leakage channels at the connection. All connection areas are sealed with fasteners, ensuring reliable sealing even under ship vibration and deformation conditions. This avoids localized corrosion caused by seawater stagnation and accumulation at the joints. Furthermore, in the event of damage to a localized armor layer, the corresponding semi-annular anti-corrosion shell can be opened individually for convenient maintenance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the anti-corrosion component structure of this utility model; Figure 3 This is an enlarged schematic diagram of the structure at point A of this utility model; Figure 4 This is an enlarged schematic diagram of the structure at point B of this utility model.

[0013] In the diagram: 1. Copper core; 2. Insulation layer; 3. Corrosion-resistant component; 301. Semi-annular anti-corrosion shell; 302. Connecting ear plate; 303. Screw hole; 304. Bolt; 305. Miniature drainage hole; 4. Bending connection component; 401. Annular sealing groove; 402. Annular sealing rubber; 403. Strip sealing rubber; 404. Bending connection pipe; 405. Butt ring; 406. Butt protrusion; 407. Sealing block; 408. Annular groove; 409. Connecting groove; 410. Connecting block; 411. Second screw hole. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4 This utility model provides a technical solution: a seawater corrosion resistant wire and cable for ship applications, comprising a conductive copper core 1, with an insulation layer 2 extruded on the outside of the copper core 1. The insulation layer 2 is preferably made of cross-linked polyethylene (XLPE) or ethylene propylene rubber (EPR), which has excellent electrical insulation performance and heat aging resistance. An anti-corrosion component 3 is provided outside the insulation layer 2 to isolate the cable body from the corrosion of seawater, salt spray and humid environment. The anti-corrosion component 3 includes two symmetrical semi-annular anti-corrosion shells 301. The semi-annular anti-corrosion shells 301 are made of corrosion-resistant metal materials (such as 316L stainless steel, titanium alloy) or high-strength engineering plastics (such as polyvinylidene fluoride PVDF, polyether ether ketone PEEK), which have good resistance to chloride ion corrosion and mechanical strength. The two semi-annular anti-corrosion shells 301 are joined together along the radial direction of the cable to form a complete annular protective cavity, which completely wraps the cable covered with the insulation layer 2.

[0016] Connecting ear plates 302 are fixedly installed at both ends of each semi-annular anti-corrosion shell 301. The connecting ear plates 302 extend perpendicularly to the end face of the semi-annular anti-corrosion shell 301, and a first screw hole 303 is opened at the top. The first screw hole 303 passes through the connecting ear plate 302 and matches the bolt 304. When the two semi-annular anti-corrosion shells 301 are put together and fitted on the outer periphery of the cable, the two sets of connecting ear plates 302 are fitted together. The axial fastening connection is achieved by screwing the bolt 304 into the first screw hole 303 to ensure the overall structure is stable and reliable. In order to further improve the sealing performance, several micro drainage holes 305 are opened on the inner bottom wall of one semi-annular anti-corrosion shell 301. The micro drainage holes 305 penetrate the wall thickness of the semi-annular anti-corrosion shell 301 and are used to drain condensate or trace amounts of seawater that may seep into the protective cavity to prevent water accumulation from causing electrochemical corrosion.

[0017] The anti-corrosion component 3 also includes a bending connection component 4, which is used to achieve a flexible connection between two adjacent anti-corrosion shell sections to adapt to the complex internal orientation of the ship and the vibration and deformation of the hull. The bending connection component 4 includes a bending connection pipe 404, the main body of which is a corrugated elastic structure, which can be made of rubber, silicone or thermoplastic elastomer (TPE), and has good flexibility and fatigue life. Both ends of the bending connection pipe 404 are fixedly connected to a docking ring 405. One end of the docking ring 405 extends to form a docking protrusion 406. The end of the docking protrusion 406 is provided with a sealing block 407. Correspondingly, a matching annular groove 408 is opened on the inner side of the end of each semi-annular anti-corrosion shell 301. The docking protrusion 406 can be inserted into the annular groove 408 to achieve positioning and locking.

[0018] To achieve a sealed fit, an annular sealing groove 401 is provided on the inner wall of the semi-annular anti-corrosion shell 301. An annular sealing rubber 402 is embedded in the annular sealing groove 401. When the mating protrusion 406 is inserted into the annular slot 408, the sealing block 407 presses the sealing rubber 402 to form a reliable axial seal. In addition, connecting grooves 409 are symmetrically opened on both sides of one end of the mating ring 405. A connecting block 410 is fixedly installed in the connecting groove 409. The top of the connecting block 410 is provided with a second screw hole 411. During installation, the connecting block 410 is placed between the two adjacent connecting blocks. Between the ear plates 302, bolts are passed through the first screw hole 303 and screwed into the second screw hole 411, thereby firmly connecting the bent connecting assembly 4 to the semi-annular anti-corrosion shell 301 and simultaneously tightening the sealing structure. Furthermore, a strip-shaped sealing rubber 403 is provided at the joint of the two semi-annular anti-corrosion shells 301. The strip-shaped sealing rubber 403 is arranged along the entire axial length and is embedded in the sealing groove of one of the shells during installation. When the two shells are closed, the strip-shaped sealing rubber 403 is compressed and undergoes elastic deformation to achieve radial sealing and effectively prevent moisture from seeping in from the joint.

[0019] In use, this application provides an anti-corrosion component 3 around the outer periphery of the insulation layer 2. The anti-corrosion component 3 includes two semi-annular anti-corrosion shells 301. The two semi-annular anti-corrosion shells 301 are fitted together from both radial sides of the cable and placed outside the insulation layer 2, so that the copper core 1 and the insulation layer 2 are completely wrapped in the annular protective cavity formed by the two semi-annular anti-corrosion shells 301. During the fitting process, the strip-shaped sealing rubber 403 provided on the inner wall of one semi-annular anti-corrosion shell 301 is tightly fitted with the joint surface of the other semi-annular anti-corrosion shell 301 to form a radial sealing structure extending along the axial direction, preventing external seawater from seeping in along the joint.

[0020] Meanwhile, each semi-annular anti-corrosion shell 301 has connecting ear plates 302 at both ends. When the two semi-annular anti-corrosion shells 301 are closed, the two sets of connecting ear plates 302 are stacked and aligned with each other, and the first screw hole 303 at the top of the plate is coaxially connected. Then, the bolt 304 is screwed into the first screw hole 303 and a pre-tightening force is applied to firmly connect the two semi-annular anti-corrosion shells 301, ensuring that the overall structure is stable and the seal is reliable. Among them, a number of micro drainage holes 305 penetrating the wall thickness are opened at the bottom of the interior of one semi-annular anti-corrosion shell 301 to drain condensate or trace amounts of seawater that may seep into the protective cavity, so as to avoid water accumulation and internal corrosion. Furthermore, a bending connection component 4 is provided between two adjacent anti-corrosion components 3. The bending connection component 4 includes a bending connection pipe 404, and the two ends of the bending connection pipe 404 are respectively fixedly connected to the mating ring 405.

[0021] One end of the mating ring 405 extends into a mating protrusion 406, and the end of the mating protrusion 406 is provided with a sealing block 407. The mating protrusion 406 is inserted into the annular groove 408 at the end of the semi-annular anti-corrosion shell 301 to achieve axial positioning and initial connection. At this time, the annular sealing rubber 402 pre-placed in the annular sealing groove 401 inside the semi-annular anti-corrosion shell 301 is squeezed by the sealing block 407 and undergoes elastic deformation to form a reliable axial dynamic seal, preventing moisture from penetrating along the connection. In addition, connecting grooves 409 are opened on both sides of one end of the mating ring 405, and connecting blocks 410 are provided in the connecting grooves 409. The top of the connecting block 410 is provided with a second screw hole 411.

[0022] During installation, the connecting block 410 is placed between two adjacent connecting lugs 302, and the second screw hole 411 is aligned with the first screw hole 303. Then, the bolts 304 are passed through the first screw hole 303 and screwed into the second screw hole 411 in sequence to achieve mechanical locking between the bent connecting component 4 and the semi-annular anti-corrosion shell 301, thereby enhancing the connection strength and seismic performance. When the cable is in service in a ship environment, the anti-corrosion component 3 as a whole is subjected to seawater splash, salt spray corrosion and hull vibration loads. However, since the semi-annular anti-corrosion shell 301 is made of corrosion-resistant metal or high-strength engineering plastic, it can effectively isolate chloride ions from corroding the internal copper core 1 and insulation layer 2. At the same time, the bent connecting pipe 404 has a flexible structure, which can adapt to the bending direction of the cable path and the small displacement of the hull caused by navigation and temperature changes, avoiding stress concentration that could lead to connection failure.

[0023] If a small amount of moisture enters the protective cavity due to environmental changes or aging of the seal, the moisture will flow along the inner wall of the lower half of the shell to the bottom and slowly drain out through the micro-drainage hole 305. Since the micro-drainage hole 305 is arranged at an angle downwards, external seawater cannot enter in reverse, thus achieving a one-way drainage function. When it is necessary to inspect or repair the cable, the bolts 304 can be removed first to loosen the fastening connection between the connecting ear plates 302. Then, the two semi-annular anti-corrosion shells 301 can be separated radially to expose the internal insulation layer 2 and copper core 1. After the inspection and repair are completed, the two semi-annular anti-corrosion shells 301 can be reassembled and locked with bolts 304 to restore the original protective state and achieve reuse.

[0024] By setting up a multi-layer sealing structure and a detachable fully enclosed protection system, all-round isolation protection is achieved for the copper core 1 and insulation layer 2 inside the cable. It has significant advantages, especially in preventing seawater immersion corrosion and droplet retention at the connection joints. The specific beneficial effects are as follows: First, after the two semi-annular anti-corrosion shells 301 are connected and locked to the connecting ear plate 302 by bolts 304, a complete annular protective cavity is formed around the outer periphery of the cable, which completely encloses the copper core 1 covered with insulation layer 2 in the internal space, so that external seawater cannot directly contact the cable body, effectively avoiding the electrochemical corrosion of copper core 1 and insulation layer 2 by chloride ions under long-term immersion environment.

[0025] Meanwhile, a strip-shaped sealing rubber 403 is provided at the joint of the two semi-annular anti-corrosion shells 301. The strip-shaped sealing rubber 403 is arranged along the entire axial length and embedded in the sealing groove of one of the semi-annular anti-corrosion shells 301. When the two shells are closed, the strip-shaped sealing rubber 403 is squeezed and elastically deformed, filling the joint gap and forming a continuous radial sealing barrier to prevent seawater from seeping in from the longitudinal gap. Furthermore, an annular sealing groove 401 is provided on the inner wall of the end of the semi-annular anti-corrosion shell 301. An annular sealing rubber 402 is fixedly installed in the annular sealing groove 401. When the sealing block 407 of the bent connecting component 4 is inserted into the annular slot 408 and contacts the annular sealing rubber 402, the annular sealing rubber 402 is deformed by pressure and closely adheres to the outer surface of the sealing block 407, forming an axially sealed structure that is closed in the circumferential direction, ensuring that there is no leakage channel at the connection between sections.

[0026] Furthermore, the mating protrusion 406 and the annular groove 408 in the bending connection assembly 4 adopt an interference fit or micro-clear clearance sliding fit design. Combined with the compression sealing effect of the sealing block 407 and the annular sealing rubber 402, the connection area is completely sealed in both the axial and radial directions. Even if there is a slight displacement due to vibration or deformation during the ship's navigation, the sealing structure can still maintain an effective fit to prevent seawater intrusion. More importantly, after the entire anti-corrosion assembly 3 is assembled, except for the micro-drainage hole 305 located at the bottom, all other joints and connections are in a completely sealed state. Moreover, the micro-drainage hole 305 has a small diameter and is inclined downward, allowing only the internal condensate to slowly drain out, while the external seawater cannot enter in reverse due to the surface tension and gravity direction restriction.

[0027] When cables operate for extended periods in ship cabins or deck environments with high salt spray and high humidity, this fully enclosed structure effectively prevents salt in the air from condensing into droplets, adhering to the cable surface, and seeping in along the gaps, significantly improving the overall corrosion resistance life of the cable.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A type of ship-grade, seawater-resistant wire and cable, characterized in that: The cable includes a copper core, an insulating layer fixedly sleeved on the outside of the copper core, and an anti-corrosion component provided on the outside of the insulating layer. The anti-corrosion component includes two semi-annular anti-corrosion shells, one end of which is provided with a bending connection component. The two semi-annular anti-corrosion shells wrap the cable through the bending connection component.

2. The anti-seawater corrosion wire and cable for ship applications according to claim 1, characterized in that: The corrosion protection component also includes two connecting lugs fixedly disposed at both ends of the semi-annular corrosion protection shell. The top of the connecting lugs is provided with a first screw hole that passes through the connecting lugs, and the internal thread of the first screw hole is provided with a bolt.

3. The anti-seawater corrosion wire and cable for ship applications according to claim 2, characterized in that: The bottom of the semi-annular anti-corrosion shell is provided with several micro-drainage holes that penetrate the semi-annular anti-corrosion shell, and the interior of the semi-annular anti-corrosion shell is provided with several annular sealing grooves.

4. The anti-seawater corrosion wire and cable for ship applications according to claim 3, characterized in that: An annular sealing rubber is fixedly installed inside the annular sealing groove, and a strip-shaped sealing rubber is fixedly installed between the two semi-annular anti-corrosion shells.

5. The anti-seawater corrosion wire and cable for ship applications according to claim 4, characterized in that: The bending connection assembly includes a bending connection tube, both ends of which are fixedly provided with a mating ring, one end of which is fixedly provided with a mating protrusion, and one end of which is fixedly provided with a sealing block. Both ends of the semi-annular anti-corrosion shell are provided with annular grooves.

6. The seawater corrosion resistant wire and cable for ship applications according to claim 5, characterized in that: One end of the docking protrusion is movably disposed inside the annular groove. Both sides of one end of the docking ring are provided with connecting grooves. A connecting block is fixedly disposed inside the connecting groove. A second screw hole is provided at the top of the connecting block. The connecting block is movably disposed between the two connecting lugs.

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