High-temperature-resistant bending-resistant cable
By adopting a multi-layer structure design, including protective sleeves, anti-corrosion layer, buffer layer, thermal insulation layer, shielding layer, fill layer and wire core, the problem of existing cables being easily damaged under high temperature and bending conditions is solved, and the cable is realized The high temperature resistance and bending resistance improve the safety performance and protection level of the cable.
Patent Information
- Application Number
- CN202420690005.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-07
AI Technical Summary
Existing cables are prone to damage under high temperature and bending conditions, resulting in fire and cable breakage, and their flame retardant effect is poor.
A high temperature resistant and bending cable is designed, adopting a multi-layer structure, including protective sleeves, anti-corrosion layers, buffer layers, thermal insulation layers, shielding layers, fill layers and wire cores, providing excellent mechanical properties and resistance through the combination of these layers. Chemical corrosiveness, thermal insulation and shielding properties.
The cable is not prone to heating and melting under high temperature conditions, which improves bending resistance, reduces deformation or breakage caused by extrusion or bending during laying, and improves the safety performance and protection level of the cable.
Smart Images
Figure CN222462398U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cables, in particular to a high temperature resistant and bending resistant cable. Background Art
[0002] Wires and cables are cables used to transmit and distribute electrical energy. Power cables are commonly used in urban underground power grids, lead-out lines of power stations, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas. The proportion of cables in power lines is gradually increasing.
[0003] As people's awareness of the fire hazards of wires and cables continues to deepen, the relevant departments have higher and higher requirements for the fire retardant and other properties of wires and cables. Since cable fires have the characteristics of fast spread, difficulty in extinguishing, secondary hazards and long recovery time, they will cause huge losses. Therefore, people have put forward more stringent operating conditions for the flame retardant, fireproof properties, safety and reliability of wires and cables.
[0004] When laying and using cables, due to their poor pressure resistance and bending resistance, they are prone to deformation or breakage when squeezed or bent, causing cable damage, arcing, combustion and fire; furthermore, the flame retardant effect of the cables is poor, and the cable core is easily burned under open flame conditions; on the other hand, since the sheath and insulation of wires and cables are composed of various polymers, these high components can quickly undergo four stages of heating and melting, decomposition, ignition of combustible gases, combustion and diffusion after a fire occurs, and harmful gases can also be produced, which is the greatest threat to people's lives after a fire occurs; and because the existing cables are constantly dragged during construction, they are easily worn, affecting the service life of the wires, so the present application proposes a high temperature resistant and bending resistant cable to solve the above technical problems. Utility Model Content
[0005] 1. Technical issues to be resolved
[0006] In view of the deficiencies in the prior art, the utility model provides a high temperature resistant and bending resistant cable, which has the advantages of improving high temperature resistance and bending resistance, and solves the problem of poor high temperature resistance and bending resistance of the cable.
[0007] (II) Technical solution
[0008] In order to achieve the above-mentioned purpose of improving high temperature resistance and anti-bending performance, the utility model provides the following technical solutions: a high temperature resistant and anti-bending cable, comprising a protective sleeve, an anti-corrosion layer is fixedly installed on the inner wall of the protective sleeve, a buffer layer is fixedly installed on the inner wall of the anti-corrosion layer, a heat insulation layer is fixedly installed on the inner wall of the buffer layer, a shielding layer is fixedly installed on the inner wall of the heat insulation layer, a filling layer is fixedly installed on the inner wall of the shielding layer, and a wire core is fixedly installed inside the filling layer;
[0009] The wire core comprises an insulating layer fixedly installed inside a filling layer, and a conductor is fixedly installed on an inner side wall of the insulating layer.
[0010] Preferably, the number of the wire cores is four, and the four wire cores are evenly distributed and fixedly installed in the filling layer.
[0011] Preferably, the filling layer is formed by filling nylon fibers on the inner side of the shielding layer.
[0012] Preferably, the conductor is formed by twisting multiple strands of fine copper wires.
[0013] Preferably, the shielding layer is formed by winding a strip of metal foil around the outside of the filling layer.
[0014] Preferably, the anti-corrosion layer is an epoxy resin layer.
[0015] Preferably, the protective sheath is a polyurethane sheath.
[0016] (III) Beneficial effects
[0017] Compared with the prior art, the utility model provides a high temperature resistant and bending resistant cable having the following features:
[0018] Beneficial effects:
[0019] The high temperature resistant and bending resistant cable can provide the cable with excellent mechanical properties and wear resistance through the protective sleeve, the anti-corrosion layer can make the cable have excellent chemical corrosion resistance, and can resist the erosion of various acids, alkalis, salts and other chemical substances, thereby protecting the cable from corrosion, the buffer layer can protect the thermal insulation layer from mechanical stress damage, such as stretching, compression and bending that may be encountered during the cable laying process, the thermal insulation layer can effectively prevent the transfer of heat, reduce the temperature rise of the cable, thereby helping to reduce energy loss and improve the safety of the cable, so as to improve the protection level of the cable, the filling layer can ensure that the cable remains round during the cabling process, avoid unevenness or twisted shape on the cable surface caused by the cable core gap, thereby improving the aesthetics and protection performance of the cable, the shielding layer can effectively shield the electromagnetic field, reduce the electromagnetic interference generated by the cable and the sensitivity to the external electromagnetic field, so as to improve the high temperature resistance of the cable, avoid the cable from being quickly heated and melted after a fire, and can also improve the bending resistance of the cable, so that the cable will not be easily deformed or broken when squeezed or bent during the laying process, thereby improving the safety performance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0021] Figure 2This is a schematic diagram of the insulating layer and conductor structure of the utility model;
[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the protective cover and the buffer layer of the utility model.
[0023] In the figure: 1. Protective cover; 2. Anti-corrosion layer; 3. Buffer layer; 4. Heat insulation layer; 5. Shielding layer; 6. Filling layer; 7. Wire core; 71. Insulation layer; 72. Conductor. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] See also Figure 1-3 A high-temperature resistant and anti-bending cable includes a protective sheath 1, which is a polyurethane sheath. The polyurethane sheath provides excellent mechanical properties and wear resistance. The inner wall of the protective sheath 1 is fixedly installed with an anti-corrosion layer 2, which is an epoxy resin layer. Epoxy resin has excellent chemical corrosion resistance and can resist the erosion of various acids, alkalis, salts and other chemical substances, thereby protecting the cable from corrosion. In addition, the epoxy resin can well seal the metal part of the cable to prevent corrosion factors such as water, oxygen, gas, etc. from penetrating into the metal, reducing internal corrosion. The inner wall of the anti-corrosion layer 2 is fixedly installed with a buffer layer 3.
[0026] The buffer layer 3 is a polyvinyl chloride layer. Polyvinyl chloride can protect the cable from mechanical stress damage, such as stretching, compression and bending that may be encountered during the cable laying process. Polyvinyl chloride can disperse the stress inside the cable and reduce stress concentration points, thereby reducing the risk of cable damage. At the same time, polyvinyl chloride has a certain elasticity and can absorb the thermal expansion and contraction of the cable caused by temperature changes, thereby reducing damage to the cable conductor 72.
[0027] The inner wall of the buffer layer 3 is fixedly installed with an insulation layer 4, and the insulation layer 4 is a rock wool layer. Rock wool is a high-efficiency thermal insulation material. Its fiber structure can effectively prevent the transfer of heat and reduce the temperature rise of the cable, which helps to reduce energy loss and improve the safety of the cable. In addition, rock wool is a non-combustible material with good fire resistance. Using rock wool as the insulation layer 4 in the cable can improve the fire resistance level of the cable system and reduce the risk of fire.
[0028] A shielding layer 5 is fixedly installed on the inner wall of the insulation layer 4. The shielding layer 5 is formed by winding a strip of metal foil around the outer side of the filling layer 6. The metal foil can effectively shield the electromagnetic field, reduce the electromagnetic interference generated by the cable and the sensitivity to the external electromagnetic field, which helps to improve the electromagnetic compatibility EMC of the cable system, prevent signal interference and data transmission errors, and the metal foil shielding layer helps to evenly distribute the electric field and reduce the concentration of the electric field, thereby improving the insulation performance and voltage resistance of the cable. A filling layer 6 is fixedly installed on the inner wall of the shielding layer 5. The filling layer 6 is formed by filling nylon fibers on the inner side of the shielding layer 5. The nylon fiber filling can ensure that the cable remains round during the cabling process, avoids unevenness or "twisted" shape on the cable surface caused by the gap in the cable core, improves the aesthetics and protective performance of the cable, and the nylon fiber has good flexibility, which can make the cable more flexible during bending and installation, and reduce damage caused by the hard filler inside the cable. At the same time, the nylon fiber has a high tensile strength, which can improve the overall tensile performance of the cable, so that the cable is not easy to break when subjected to tension.
[0029] A wire core 7 is fixedly installed inside the filling layer 6. The number of the wire cores 7 is four. The four wire cores 7 are evenly distributed and fixedly installed in the filling layer 6. The wire core 7 includes an insulating layer 71 fixedly installed inside the filling layer 6. The insulating layer 71 is a polyethylene layer. Polyethylene is a good electrical insulating material that can prevent current from passing through, ensuring that the cable conductor will not leak or short-circuit during operation. The polyethylene material is relatively low in cost, making the cable manufacturing cost relatively economical. A conductor 72 is fixedly installed on the inner wall of the insulating layer 71. The conductor 72 is formed by twisting multiple strands of fine copper wires.
[0030] In summary, the high temperature resistant and bending resistant cable can provide the cable with excellent mechanical properties and wear resistance through the protective sheath 1, the anti-corrosion layer 2 can make the cable have excellent chemical corrosion resistance, and can resist the erosion of various acids, alkalis, salts and other chemical substances, thereby protecting the cable from corrosion, the buffer layer 3 can protect the thermal insulation layer 4 from mechanical stress damage, such as stretching, compression and bending that may be encountered during the cable laying process, the thermal insulation layer 4 can effectively prevent the transfer of heat and reduce the temperature rise of the cable, thereby helping to reduce energy loss and improve the safety of the cable, thereby improving the protection level of the cable, and the filling layer 6 can ensure that the cable remains round during the cabling process, avoid unevenness or twisted shapes on the cable surface caused by cable core gaps, thereby improving the aesthetics and protection performance of the cable. The shielding layer 5 can effectively shield the electromagnetic field, reduce the electromagnetic interference generated by the cable and the sensitivity to the external electromagnetic field, so as to improve the high temperature resistance of the cable, avoid the cable from being quickly heated and melted after a fire, and can also improve the bending resistance of the cable, so that the cable will not be easily deformed or broken when squeezed or bent during laying, thereby improving the safety performance of the cable.
[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0032] Although the 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high temperature resistant and bending resistant cable, comprising a protective sleeve (1), characterized in that: The inner wall of the protective sleeve (1) is fixedly mounted with an anti-corrosion layer (2), the inner wall of the anti-corrosion layer (2) is fixedly mounted with a buffer layer (3), the inner wall of the buffer layer (3) is fixedly mounted with a heat insulation layer (4), the inner wall of the heat insulation layer (4) is fixedly mounted with a shielding layer (5), the inner wall of the shielding layer (5) is fixedly mounted with a filling layer (6), and a wire core (7) is fixedly mounted inside the filling layer (6); The wire core (7) comprises an insulating layer (71) fixedly mounted inside the filling layer (6), and a conductor (72) is fixedly mounted on the inner side wall of the insulating layer (71).
2. A high temperature resistant and bending resistant cable according to claim 1, characterized in that: The number of the wire cores (7) is four, and the four wire cores (7) are evenly distributed and fixedly installed in the filling layer (6).
3. A high temperature resistant and bending resistant cable according to claim 1, characterized in that: The filling layer (6) is formed by filling nylon fibers on the inner side of the shielding layer (5).
4. The high temperature resistant and bending resistant cable according to claim 1, characterized in that: The conductor (72) is formed by twisting a plurality of thin copper wires.
5. The high temperature resistant and bending resistant cable according to claim 1, characterized in that: The shielding layer (5) is formed by winding a strip of metal foil around the outside of a filling layer (6).
6. The high temperature resistant and bending resistant cable according to claim 1, characterized in that: The anti-corrosion layer (2) is an epoxy resin layer.
7. The high temperature resistant and bending resistant cable according to claim 1, characterized in that: The protective sheath (1) is a polyurethane sheath.