Large-current-carrying-capacity high-water-temperature-resistant waterproof cable with self-repairing function
By introducing a negative gap design between the silicone rubber self-repair sheath layer and the waterproof lead sleeve layer into the high-temperature waterproof cable, the problem of local damage to the cable in high-temperature water needs to be replaced, and the self-repair function is realized, which improves the service life and reduces the replacement cost.
Patent Information
- Application Number
- CN202422654046.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-31
AI Technical Summary
When used in high-temperature waterproof cables, they need to be replaced in time after local accidental damage, which is costly and short in service life, and cannot be self-repaired.
The structural design is adopted for high-temperature resistant silicone rubber cables, silicone rubber self-repair sheath layer, waterproof lead sheath layer, nylon sheath layer and composite high-strength fiber outer cover layer set from the inside to the outside. Among them, a negative gap of -0.5mm to -1.0mm is provided between the silicone rubber self-repair sheath layer and the waterproof lead sheath layer. The silicone rubber sheath layer can be squeezed and filled with gaps when damaged to achieve self-repair.
The cables that achieve high current carrying capacity and high temperature water resistance do not need to be replaced when locally damaged, which reduces the replacement cost and extends the service life.
Smart Images
Figure CN223193563U_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a high-temperature resistant and waterproof cable, in particular to a high-current carrying and high-water-temperature resistant and waterproof cable with a self-repairing function. Background Art
[0002] In recent years, with rising consumer spending, hot springs have become a popular leisure and wellness destination. However, few hot springs are suitable for direct consumption. Most are heated or mixed with low-temperature water. For high-temperature or underground hot springs, submersible pumps are required to extract the high-temperature water and mix it with the low-temperature water. Existing high-temperature, waterproof cables consist of a cable core, insulation layer, filler layer, water-blocking sheath, inner sheath, braided layer, and outer sheath. When laid in high-temperature water, these cables can only absorb a limited amount of water for a short period of time if they are accidentally damaged (e.g., cracked during installation or during use due to squeezing or hooking). This requires prompt replacement, which is costly and labor-intensive. Localized cracks in the outer protective layers (inner and outer sheaths) render them unusable, resulting in a short service life. Summary of the Invention
[0003] The purpose of the present invention is to provide a high-current-carrying, high-temperature-resistant and waterproof cable with a self-repairing function for use in high-water-temperature scenarios, which has a large current-carrying capacity, is resistant to high-temperature water, does not require replacement when locally damaged accidentally, reduces costs, saves work hours, and has a long service life.
[0004] In order to achieve the above object, the technical solution adopted by the present invention is:
[0005] A high-current-carrying, high-water-temperature-resistant, waterproof cable with a self-repairing function, characterized in that it comprises a high-temperature-resistant silicone rubber cable, a silicone rubber self-repairing sheath layer, a waterproof lead sheath layer, a nylon sheath layer and a composite high-strength fiber outer layer arranged in sequence from the inside to the outside; the high-temperature-resistant silicone rubber cable comprises a cable core and a silicone rubber insulation layer; the silicone rubber self-repairing sheath layer is made of a silicone rubber material with a hardness of 30 to 50 Shore A, and the gap between the silicone rubber self-repairing sheath layer and the waterproof lead sheath layer is -0.5 mm to -1.0 mm.
[0006] Furthermore, the core of the high-temperature resistant silicone rubber cable is formed by co-twisting Category 5 tinned soft copper wires. The silicone rubber insulation layer is formed by extruding silicone rubber around the outer surface of the cable core and then vulcanizing it. The high-temperature resistant silicone rubber cable core is made of fine tinned oxygen-free annealed copper wires, which are first bundled into strands in regular layers and then co-twisted into a core. The insulation is made of silicone rubber material with a conductor operating temperature of up to 180°C, and is formed using extrusion equipment.
[0007] The silicone rubber self-healing sheath is made of silicone rubber with a hardness of 35-40 Shore A, which is directly squeezed into the gap to fill it. By setting a negative gap of -0.5 to -1.0 mm between the silicone rubber self-healing sheath and the waterproof lead sheath, the silicone rubber sheath is subjected to a certain amount of extrusion pressure. If the cable is damaged by external forces, the silicone rubber self-healing sheath can be squeezed into the damaged area under the action of the extrusion pressure, allowing the cable to be used normally and realizing the self-healing function.
[0008] The nylon sheath layer described in the present invention is formed by extruding non-toxic and corrosion-resistant nylon material. As a protective layer for the waterproof lead sheath layer, the nylon sheath layer can prevent lead toxins from diffusing into the water, and also prevent lead and other metals in the water from forming a primary battery to cause corrosion.
[0009] The composite high-strength fiber outer layer described in the present invention is formed by wrapping a submarine cable PP rope and high-strength aramid.
[0010] The high-temperature-resistant silicone rubber cable of the present invention uses silicone rubber as its insulation material, increasing its current carrying capacity by at least 30% compared to conventional waterproof cables using cross-linked polyethylene insulation. A waterproof lead sheath made of metallic lead provides radial waterproofing of the cable. Lead sheaths are a relatively soft metal material used in the cable industry. This sheath not only meets radial waterproofing requirements but is also largely unaffected by water depth, while also maintaining the overall current-carrying capacity of the cable. The metallic lead sheath is protected by non-toxic, corrosion-resistant nylon. A thin layer of nylon, approximately 0.2 mm thick, is sufficient, and its low thermal resistance has a negligible effect on current carrying capacity. The outer sheath is constructed of submarine PP rope and high-strength aramid material. During submerged installation, water can directly contact the nylon sheath, which has no effect on current carrying capacity. Furthermore, the proportion of aramid in the outer sheath can be increased based on the cable's installation length and vertical drop, ensuring that the cable installation is unaffected by vertical drop. The present invention offers advantages such as high current carrying capacity, high-temperature water resistance, self-repair in the event of accidental local damage, eliminating the need for replacement, reducing costs, saving labor, and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 Schematic diagram of the structure of the cable of the present invention. DETAILED DESCRIPTION
[0012] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.
[0013] like Figure 1The high-current-carrying, high-temperature, waterproof cable with a self-repairing function shown in the figure comprises, from the inside out, a high-temperature-resistant silicone rubber cable, a self-repairing silicone rubber sheath 3, a waterproof lead sheath 4, a nylon sheath 5, and a composite high-strength fiber outer layer 6. The high-temperature-resistant silicone rubber cable comprises a cable core 1 and a silicone rubber insulation layer 2. The cable core, which serves as the cable's conductor, is constructed from fine, tinned, oxygen-free annealed copper wire, which is first bundled into strands in a regular pattern and then twisted in the same direction. The silicone rubber insulation layer 2 is formed by extruding silicone rubber around the outer surface of the cable core 1 and vulcanizing it. The self-repairing silicone rubber sheath is made of silicone rubber with a hardness of 35 to 40 Shore A. Under high-temperature water, the self-repairing silicone rubber sheath remains relatively soft. The gap between the self-repairing silicone rubber sheath and the waterproof lead sheath is a negative gap of -0.5 mm to -1.0 mm.
[0014] The nylon sheath layer 5 described in the present invention is formed from an extruded, non-toxic, and corrosion-resistant nylon material. As a protective layer for the waterproof lead sheath 4, the nylon sheath 5 prevents lead toxins from diffusing into the water and also prevents lead from forming a galvanic cell with other metals in the water, which can cause corrosion. The composite high-strength fiber outer sheath is formed from a submarine cable PP rope and a high-strength aramid wrapping.
[0015] The waterproof lead sheath in the present invention can prevent water from radially entering the interior of the cable. When the water depth is large, exceeding 50 meters, the rubber-plastic material will penetrate under the action of pressure. The waterproof lead sheath is made of dense metal lead, which can effectively prevent moisture from penetrating the lead sheath into the interior of the cable. When metal lead is exposed to oxygen, water and carbon dioxide in the air, its surface will quickly oxidize to form a protective film; it basically does not react with cold acids and cold alkalis, but will react with strong acids and strong alkalis at high temperatures. The maximum temperature of high-temperature water does not exceed 100°C. The waterproof lead sheath can adapt to deep water and high temperature environments. The present invention utilizes the high temperature resistance of silicone rubber materials and adds a waterproof lead sheath on the basis of heat resistance. It hardly increases the thermal resistance of the sheath, allowing it to be used in high-temperature and deep water. The present invention solves the technical problems that high-temperature cables with large current carrying capacity cannot be used in water, and cables used in water are not resistant to high temperatures.
[0016] The high-temperature resistant silicone rubber cable of the present invention uses silicone rubber as the insulating material, which increases the current carrying capacity by at least 30% compared to the traditional waterproof cable using cross-linked polyethylene insulation. A waterproof lead sheath made of metal lead is used for radial waterproofing of the cable. The lead sheath is a relatively soft metal material used in the cable industry. The use of the lead sheath not only meets the radial waterproofing requirements, but is also basically unaffected by the water depth, while not affecting the overall current carrying capacity of the cable. Non-toxic nylon with excellent corrosion resistance is used as the protection of the metal lead sheath. The nylon sheath only needs a very thin layer of about 0.2mm thickness. The thermal resistance coefficient of nylon is small, and the effect on the current carrying capacity can be ignored. The outer sheath adopts submarine cable PP rope and high-strength aramid material. When laid in water, water can directly contact the nylon sheath. This layer has no effect on the current carrying capacity. At the same time, the proportion of aramid in the outer sheath can be increased according to the laying length and vertical drop of the cable, so that the cable laying is not affected by the vertical drop. The self-healing silicone rubber sheath is made of silicone rubber with a hardness of 35-40 Shore A. It is directly extruded into the gaps to fill them, maintaining a certain degree of softness in high-temperature water. By adjusting the lead extrusion die so that the waterproof lead sheath die is smaller than the outer diameter of the extruded silicone rubber self-healing sheath, the gap between the silicone rubber self-healing sheath and the waterproof lead sheath (metal lead sheath) is maintained at a negative gap of -0.5 to -1.0 mm. This creates a certain compressive pressure on the silicone rubber sheath. If the cable is damaged by external forces, resulting in gaps or through-holes, the self-healing silicone rubber sheath can be squeezed into the damaged area under the action of the extrusion pressure, sealing the gaps or through-holes and allowing normal cable operation, thus achieving self-healing functionality. This invention offers the advantages of high current carrying capacity, high-temperature water resistance, and the ability to self-repair in the event of accidental local damage, eliminating the need for replacement. This reduces costs, saves labor, and extends service life.
Claims
1. A high current carrying capacity, high water temperature resistant and waterproof cable with self-repair function, characterized in that: It includes a high-temperature resistant silicone rubber cable, a silicone rubber self-repairing sheath layer, a waterproof lead sheath layer, a nylon sheath layer and a composite high-strength fiber outer layer arranged in sequence from the inside to the outside; the high-temperature resistant silicone rubber cable includes a cable core and a silicone rubber insulation layer; the silicone rubber self-repairing sheath layer is made of silicone rubber material with a hardness of 30 to 50 Shore A, and the gap between the silicone rubber self-repairing sheath layer and the waterproof lead sheath layer is -0.1mm to -2.0mm.
2. The high current carrying capacity, high water temperature resistant and waterproof cable with self-repairing function according to claim 1 is characterized in that: The cable core of the high-temperature resistant silicone rubber cable is formed by twisting five types of tinned soft copper wires in the same direction, and the silicone rubber insulation layer is formed by extruding silicone rubber on the outer side of the cable core and vulcanizing it.
3. The high current carrying capacity, high water temperature resistant and waterproof cable with self-repairing function according to claim 1 is characterized in that: The silicone rubber self-repairing sheath layer is formed by directly squeezing a silicone rubber material with a hardness of 35 to 40 Shore A into the gap for filling.
4. The high current carrying capacity, high water temperature resistant and waterproof cable with self-repairing function according to claim 1 is characterized in that: The gap between the silicone rubber self-repairing sheath layer and the waterproof lead sheath layer is -0.5mm to -1.0mm.
5. The high current carrying capacity, high water temperature resistant and waterproof cable with self-repairing function according to claim 1 is characterized in that: The nylon sheath layer is formed by extruding non-toxic and corrosion-resistant nylon material.
6. The high current carrying capacity, high water temperature resistant and waterproof cable with self-repairing function according to claim 1 is characterized in that: The composite high-strength fiber outer layer is formed by wrapping the submarine cable PP rope and high-strength aramid.