Cable capable of avoiding excessive deformation caused by thermal expansion and cold contraction

Abstract

The invention discloses a cable capable of avoiding excessive deformation caused by thermal expansion and cold contraction, relates to the technical field of cables, and provides the following scheme that the cable comprises a conductive cable core and an outer insulating sheath wrapping the outer side of the conductive cable core, and further comprises a liquid cooling assembly arranged in the outer insulating sheath and used for performing high-temperature liquid cooling on the interior of the cable; the excessive stretching prevention assembly is arranged in the outer insulating sheath, is positioned on the inner side of the liquid cooling assembly, and is used for performing excessive stretching protection on the cable when the cable expands with heat and contracts with cold; and the metal shielding protection assembly is arranged in the outer insulating sheath, is positioned on the inner side of the excessive stretching prevention assembly, and is used for carrying out anti-creeping protection on the cable. Through the synergistic effect of all the components, the cable can effectively resist adverse effects caused by thermal expansion and cold contraction, the problems of insulating layer breakage, conductor connection looseness, sheath cracking and the like are reduced, the fault probability is reduced, the service life of the cable is remarkably prolonged, the replacement and maintenance cost is reduced, and good economic benefits and practical value are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a cable capable of avoiding excessive deformation due to thermal expansion and contraction. Background Art

[0002] In modern power transmission and electrical equipment connections, cables are key carriers of power transmission and are widely used in various fields. However, due to the complex and changeable working environment of cables, temperature changes have become an important factor affecting cable performance and service life. Thermal expansion and contraction are basic physical properties of matter. When the temperature of the cable changes, its internal conductors, insulation layers, sheaths and other structures will expand or contract accordingly. When the temperature change range is large or the changes are frequent, the difference in deformation of the various layers of cable materials due to thermal expansion and contraction can easily lead to stress concentration inside the cable. If this stress concentration accumulates for a long time and exceeds the material's bearing limit, it will cause the insulation layer to rupture, the conductor connection to loosen, and even cause serious problems such as cracking of the cable sheath. The rupture of the insulation layer will reduce the insulation performance of the cable, increase the risk of leakage, and threaten the safety of personnel and the normal operation of equipment. The loose conductor connection will increase the contact resistance, resulting in increased heat, further affecting the transmission efficiency of the cable. rate, and may even cause safety accidents such as fire; cracking of the cable sheath will not only make the cable lose its ability to protect it from the external environment, such as being corroded by moisture and chemicals, accelerating the aging of the cable, but also reduce the mechanical strength of the cable, making it more susceptible to damage when subjected to external forces, especially in some special environments, such as extremely low temperatures in winter in high-altitude and cold areas, where the cable shrinks significantly; and in high-temperature industrial sites or hot outdoor environments in summer, the cable will expand due to rising temperature. The problem of thermal expansion and contraction of cables in these environments is more prominent, seriously restricting the reliability and service life of the cables. At present, although there are some cables on the market that claim to have anti-thermal expansion and contraction properties, most of them have only made certain improvements in material selection. For the problem of excessive deformation caused by thermal expansion and contraction, they have failed to provide effective solutions from the fundamental structure and working principle. Therefore, the development of a cable that can effectively avoid excessive deformation due to thermal expansion and contraction is of great practical significance and urgent need. Summary of the Invention

[0003] The cable proposed by the present invention, which avoids excessive deformation due to thermal expansion and contraction, solves the above-mentioned shortcomings in the prior art.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: The cable is designed to avoid excessive deformation due to thermal expansion and contraction, including a conductive cable core and an outer insulating sheath wrapped around the conductive cable core, and also includes: Liquid cooling assembly, located inside the outer insulating sheath, is used to cool the inside of the cable by liquid cooling; The anti-overstretching component is located inside the outer insulating sheath and inside the liquid cooling component, and is used to protect the cable from overstretching due to thermal expansion and contraction; The metal shielding protection component is inside the outer insulating sheath and located on the inner side of the anti-overstretching component, and is used to protect the cable from leakage.

[0005] Furthermore, the anti-overstretching component includes two support rings that are symmetrically fixedly connected to the inside of the outer insulating sheath, and a plurality of arc-shaped rubber strips are fixedly connected in an array on opposite sides of the two support rings. The plurality of arc-shaped rubber strips are movably sleeved on the inside of the outer insulating sheath and do not contact the inside of the outer insulating sheath.

[0006] Furthermore, the liquid cooling assembly includes two connecting rings fixedly connected to the opposite sides of the two support rings, and a plurality of telescopic condensing tubes are fixedly connected in an array between the two connecting rings. Through holes are opened on the opposite sides of the two connecting rings corresponding to the plurality of telescopic condensing tubes, and the plurality of telescopic condensing tubes are respectively connected to the corresponding through holes.

[0007] Furthermore, the metal shielding protection assembly includes a metal shielding sleeve, a buffer adjustment layer and an inner insulating sleeve. The metal shielding sleeve is fixedly connected between two support rings. A plurality of diamond-shaped heat dissipation holes are arranged in an array on the metal shielding sleeve. The metal shielding sleeve is a shielding mesh structure made of copper or aluminum metal material. Its main function is to shield the electromagnetic interference generated inside the cable, and it can also enhance the mechanical strength of the cable to a certain extent.

[0008] Furthermore, the buffer adjustment layer is composed of a plurality of semi-arc insulating rubber plates that are evenly distributed along the axial direction of the cable and have elastic adjustment. A first card slot and a second card slot are respectively provided at both ends of the plurality of semi-arc insulating rubber plates. The first card slot is correspondingly engaged with the adjacent second card slot, and the first card slot is slidingly connected with the second card slot. The semi-arc insulating rubber plates are made of polycarbonate material. Polycarbonate has high strength, good toughness and dimensional stability, can withstand certain external forces and is not easy to deform. When the cable expands or contracts due to temperature changes, the buffer adjustment layer can absorb and release stress through the expansion and contraction of the semi-arc insulating rubber plates, effectively alleviating the relative displacement between the layers of the cable due to thermal expansion and contraction, avoiding excessive deformation, and can also play a certain buffering role when the cable is bent or subjected to external force.

[0009] Furthermore, the inner insulating sleeve is arranged on the inner side of multiple semi-arc insulating rubber plates, and the conductive cable core is arranged inside the inner insulating sleeve. The inner insulating sleeve is made of cross-linked polyethylene material. Cross-linked polyethylene has excellent electrical insulation performance, high heat resistance and mechanical strength, and can provide reliable insulation protection for the cable core.

[0010] Furthermore, the conductive cable core is formed by twisting multiple conductors, and flexible filling material is filled between the conductors. The flexible filling material is made of rubber or silicone with good flexibility and insulation properties. Its function is to play a buffering and supporting role inside the conductive cable core, reduce the mutual friction and extrusion of the conductors during thermal expansion and contraction, and at the same time enhance the flexibility of the conductive cable core, facilitating the bending and laying of the cable.

[0011] Furthermore, the outer insulating sheath is made of EPDM rubber material and high-strength polyvinyl chloride material. Ethylene propylene rubber has excellent weather resistance, aging resistance and insulation performance, which can further improve the insulation performance of the cable and its protection against the external environment. Polyvinyl chloride has good wear resistance, corrosion resistance and mechanical strength, which can provide solid external protection for the cable and prevent the cable from being damaged by external forces and environmental erosion.

[0012] Compared with the existing technology, the beneficial effects of the present invention are: The present invention provides a buffer adjustment layer, wherein the first and second slots at both ends of the semi-arc insulating rubber plate cooperate with each other to expand and contract according to the stress generated by temperature changes, effectively absorbing and releasing stress, alleviating the relative displacement between the layers of the cable, and avoiding excessive deformation. At the same time, the arc-shaped rubber strip in the anti-overstretching component can play a pulling and supporting role in the expansion and contraction of the cable, further preventing excessive deformation and significantly improving the stability of the cable during temperature changes. The present invention utilizes a circulation system composed of a telescopic condenser tube and a connecting ring in the liquid cooling assembly. This system can efficiently cool down the cable through the flow of condensate when the cable temperature rises, thereby reducing the degree of expansion caused by high temperature. Furthermore, the circulation of the condensate can also provide a certain degree of compensation for the thermal expansion and contraction of the cable, ensuring that the cable will not be excessively deformed due to drastic temperature changes, thereby ensuring the normal working state of the cable. The present invention uses a metal shielding protection component to not only effectively shield electromagnetic interference and enhance the cable's anti-interference ability, but also improve the cable's mechanical strength. The inner insulating sheath is made of cross-linked polyethylene material, providing reliable insulation protection and reducing the risk of leakage. The outer insulating sheath combines the advantages of EPDM and PVC materials, with good weather resistance, wear resistance and protection, making the cable adaptable to various complex environments. In summary, this equipment not only enables the cable to effectively resist the adverse effects of thermal expansion and contraction through the synergistic effect of various components, reducing the occurrence of problems such as insulation cracking, loose conductor connections, and sheath cracking, but also reduces the probability of failure, significantly extends the service life of the cable, and reduces replacement and maintenance costs, with good economic benefits and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1This is a schematic diagram of the overall top-down stereoscopic structure of a cable proposed by the present invention to avoid excessive deformation due to thermal expansion and contraction; Figure 2 This is a top-down perspective structural diagram of a liquid cooling assembly and an anti-overstretching assembly for cables that prevent excessive deformation due to thermal expansion and contraction, as proposed by the present invention; Figure 3 This is a schematic top view of the three-dimensional structure of the liquid cooling assembly of the cable proposed by the present invention to avoid excessive deformation due to thermal expansion and contraction; Figure 4 This is a top perspective structural diagram of the anti-overstretching assembly of the cable for preventing excessive deformation due to thermal expansion and contraction, as proposed by the present invention; Figure 5 This is a schematic top view of the three-dimensional structure of the metal shielding protection assembly of the cable proposed by the present invention to prevent excessive deformation due to thermal expansion and contraction; Figure 6 This is a bottom-view three-dimensional structural diagram of a metal shielding sleeve of a cable that prevents excessive deformation due to thermal expansion and contraction, as proposed by the present invention; Figure 7 This is a bottom-up perspective structural diagram of a semi-arc insulating rubber plate, an inner insulating sleeve, and a flexible filling material of a cable for preventing excessive deformation due to thermal expansion and contraction, as proposed by the present invention; Figure 8 This is a schematic top view of the three-dimensional structure of the assembled semi-arc insulating rubber plates of the cable to prevent excessive deformation due to thermal expansion and contraction, as proposed by the present invention; Figure 9 This is a top-down perspective structural diagram of the first and second clamping slots of a cable that prevents excessive deformation due to thermal expansion and contraction, as proposed by the present invention.

[0014] In the figure: 1. Outer insulating sheath; 2. Liquid cooling assembly; 201. Connecting ring; 202. Telescopic condenser tube; 3. Anti-overstretching assembly; 301. Support ring; 302. Arc-shaped rubber strip; 4. Metal shielding protection assembly; 401. Metal shielding sleeve; 402. Semi-arc insulating rubber plate; 403. Inner insulating sleeve; 404. First slot; 405. Second slot; 406. Flexible filling material; 5. Conductive cable core. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0016] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention. Example

[0017] Reference Figure 1-9 : A cable for preventing excessive deformation due to thermal expansion and contraction, comprising a conductive cable core 5 and an outer insulating sheath 1 wrapped around the outer side of the conductive cable core 5, and further comprising: The over-stretching prevention component 3 is located inside the outer insulating sheath 1 and inside the liquid cooling component 2. It is used to protect the cable from over-stretching due to thermal expansion and contraction. The over-stretching prevention component 3 includes two support rings 301 symmetrically fixedly connected to the interior of the outer insulating sheath 1. A plurality of arcuate rubber strips 302 are fixedly connected in an array on opposite sides of the two support rings 301. The plurality of arcuate rubber strips 302 are movably sleeved inside the outer insulating sheath 1 without contacting the interior of the outer insulating sheath 1. The liquid cooling assembly 2 is located inside the outer insulating sheath 1 and is used to cool the high-temperature inside the cable by liquid cooling. The liquid cooling assembly 2 includes two connecting rings 201 fixedly connected to opposite sides of the two supporting rings 301. A plurality of telescopic condensing tubes 202 are fixedly connected in an array between the two connecting rings 201. Through holes are opened on opposite sides of the two connecting rings 201 corresponding to the plurality of telescopic condensing tubes 202. The plurality of telescopic condensing tubes 202 are respectively connected to the corresponding through holes. The metal shielding protection component 4 is located inside the outer insulating sheath 1 and inside the anti-overstretching component 3, and is used to protect the cable from leakage. The metal shielding protection component 4 includes a metal shielding sleeve 401, a buffer adjustment layer, and an inner insulating sleeve 403. The metal shielding sleeve 401 is fixedly connected between the two support rings 301. The metal shielding sleeve 401 is arrayed with multiple diamond-shaped heat dissipation holes. The metal shielding sleeve 401 is composed of a copper shielding mesh with a mesh size of 200. Its main function is to shield electromagnetic interference generated inside the cable, and it can also enhance the mechanical strength of the cable to a certain extent. The conductive cable core 5 is formed by twisting multiple copper conductors, and a flexible filling material 406 is filled between the conductors. The flexible filling material 406 is made of rubber or silicone with good flexibility and insulation properties. Its function is to play a buffering and supporting role inside the conductive cable core 5, reducing the mutual friction and extrusion of the conductors during thermal expansion and contraction, and at the same time enhancing the flexibility of the conductive cable core 5, making it easier to bend and lay the cable.

[0018] In the present invention, the buffer adjustment layer is composed of a plurality of semi-arc insulating rubber plates 402 that are evenly distributed along the axial direction of the cable and have elastic adjustment. A first card slot 404 and a second card slot 405 are respectively provided at both ends of the plurality of semi-arc insulating rubber plates 402. The first card slot 404 is correspondingly engaged with the adjacent second card slot 405, and the first card slot 404 and the second card slot 405 are slidingly connected. The semi-arc insulating rubber plates 402 are made of polycarbonate material. Polycarbonate has high strength, good toughness and dimensional stability, can withstand certain external forces and is not easy to deform. When the cable expands or contracts due to temperature changes, the buffer adjustment layer can absorb and release stress through the expansion and contraction of the semi-arc insulating rubber plates 402, effectively alleviating the relative displacement between the layers of the cable due to thermal expansion and contraction, avoiding excessive deformation, and can also play a certain buffering role when the cable is bent or subjected to external force.

[0019] In the present invention, the inner insulating sleeve 403 is sleeved on the inner side of multiple semi-arc insulating rubber plates 402, and the conductive cable core 5 is sleeved inside the inner insulating sleeve 403. The inner insulating sleeve 403 is made of cross-linked polyethylene material with a thickness of 3 mm. Cross-linked polyethylene has excellent electrical insulation properties, high heat resistance and mechanical strength, and can provide reliable insulation protection for the cable core.

[0020] In the present invention, the outer insulating sheath 1 is made of EPDM material with a thickness of 4 mm. EPDM has excellent weather resistance, aging resistance and insulation performance, which can further improve the insulation performance of the cable and its protection against the external environment. Example

[0021] The difference between this embodiment and embodiment 1 is that: The conductive cable core 5 is formed by twisting a plurality of aluminum conductors, and the spaces between the conductors are filled with a flexible filling material 406; The thickness of the inner insulating sleeve 403 is 2.5 mm; The metal shielding sleeve 401 is composed of an aluminum shielding mesh having a mesh size of 150; The outer insulating sheath 1 is made of high-strength polyvinyl chloride material with a thickness of 3.5 mm. Polyvinyl chloride has good wear resistance, corrosion resistance and mechanical strength, and can provide solid external protection for the cable to prevent the cable from being damaged by external forces and environmental erosion.

[0022] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0023] Working principle: When the ambient temperature of the cable changes, the conductive cable core 5, the inner insulating sleeve 403, the metal shielding sleeve 401, and the outer insulating sleeve 1 will expand or contract accordingly due to thermal expansion and contraction. At this time, the semi-arc insulating rubber plate 402 in the buffer adjustment layer plays a role, so that the multiple semi-arc insulating rubber plates 402 will expand and contract along the first card slot 404 and the second card slot 405 according to the stress generated by the temperature change, thereby absorbing and releasing the stress and alleviating the relative displacement between the inside of the cable. At the same time, the expansion and contraction of the cable are pulled and supported by the arc-shaped rubber strip 302 to avoid excessive deformation. At the same time, the condensate circulates in the telescopic condensation tube 202 and the connecting ring 201 to provide compensation for the thermal expansion and contraction of the cable, ensuring that the cable will not be excessively deformed due to thermal expansion and contraction, thereby ensuring the service life of the cable.

[0024] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A cable for preventing excessive deformation due to thermal expansion and contraction, comprising a conductive cable core (5) and an outer insulating sheath (1) wrapped around the outer side of the conductive cable core (5), characterized in that: Also includes: A liquid cooling component (2) is located inside the outer insulating sheath (1) and is used to cool the interior of the cable by liquid cooling; An anti-overstretching component (3) is located inside the outer insulating sheath (1) and inside the liquid cooling component (2), and is used to protect the cable from overstretching when it expands and contracts due to heat; The metal shielding protection component (4) is located inside the outer insulating sheath (1) and inside the anti-overstretching component (3), and is used to provide leakage protection for the cable.

2. The cable for preventing excessive deformation due to thermal expansion and contraction according to claim 1, characterized in that: The anti-overstretching component (3) comprises two support rings (301) symmetrically fixedly connected to the inside of the outer insulating sheath (1); a plurality of arc-shaped rubber strips (302) are fixedly connected in an array on opposite sides of the two support rings (301); the plurality of arc-shaped rubber strips (302) are movably sleeved inside the outer insulating sheath (1) and do not contact the inside of the outer insulating sheath (1).

3. The cable for preventing excessive deformation due to thermal expansion and contraction according to claim 2, characterized in that: The liquid cooling assembly (2) comprises two connecting rings (201) fixedly connected to opposite sides of the two supporting rings (301), a plurality of telescopic condensing tubes (202) are fixedly connected in an array between the two connecting rings (201), through holes are provided on opposite sides of the two connecting rings (201) corresponding to the plurality of telescopic condensing tubes (202), and the plurality of telescopic condensing tubes (202) are respectively connected to the corresponding through holes.

4. The cable for preventing excessive deformation due to thermal expansion and contraction according to claim 2, characterized in that: The metal shielding protection assembly (4) comprises a metal shielding sleeve (401), a buffer adjustment layer and an inner insulating sleeve (403); the metal shielding sleeve (401) is fixedly connected between two support rings (301); and a plurality of diamond-shaped heat dissipation holes are arranged in an array on the metal shielding sleeve (401).

5. The cable for preventing excessive deformation due to thermal expansion and contraction according to claim 4, characterized in that: The buffer adjustment layer is composed of a plurality of semi-arc insulating rubber plates (402) uniformly distributed along the cable axis and having elastic adjustment capabilities. A first card slot (404) and a second card slot (405) are respectively provided at both ends of the plurality of semi-arc insulating rubber plates (402). The first card slot (404) is correspondingly engaged with the adjacent second card slot (405), and the first card slot (404) and the second card slot (405) are slidably connected.

6. The cable for preventing excessive deformation due to thermal expansion and contraction according to claim 4, characterized in that: The inner insulating sleeve (403) is sleeved on the inner side of the plurality of semi-arc insulating rubber plates (402), and the conductive cable core (5) is sleeved inside the inner insulating sleeve (403).

7. The cable for preventing excessive deformation due to thermal expansion and contraction according to claim 1, characterized in that: The conductive cable core (5) is formed by twisting a plurality of conductors, and a flexible filling material (406) is filled between the conductors. The flexible filling material (406) is made of rubber or silicone with good flexibility and insulation properties.

8. The cable for preventing excessive deformation due to thermal expansion and contraction according to claim 1, characterized in that: The outer insulating sheath (1) is made of ethylene propylene rubber material and high-strength polyvinyl chloride material.

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