Electromagnetic induction heating cable
By designing rare-earth aluminum alloy conductor cores and high-temperature resistant insulation layers, the problems of heavy weight and high cost of traditional cables have been solved, enabling the widespread application of cables in construction and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI ELEC PWR INSTALLATION 1ST ENG CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-06-30
AI Technical Summary
Traditional copper core heating cables are heavy, expensive, and difficult to operate, while silver-aluminum alloy heating cables are expensive and difficult to widely use in heat treatment operations during construction.
The design employs a rare-earth aluminum alloy conductor core, a high-temperature resistant insulation layer, and a high-temperature resistant fiber tube. The rare-earth aluminum alloy core wire is covered with a rare-earth layer, and multiple strands of rare-earth aluminum alloy core wire are twisted into a spiral structure. The high-temperature resistant insulation layer is wrapped around the outer periphery, and the high-temperature resistant fiber tube is wrapped around the outside. It can be detachably connected through an aluminum connector.
Rare earth aluminum alloy core wires are lighter and less expensive, with heat concentrated on the workpiece, resulting in lower maintenance costs and making them suitable for heat treatment operations during construction.
Smart Images
Figure CN224439226U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cable technology, and in particular to an electromagnetic induction heating cable. Background Technology
[0002] Electromagnetic induction heat treatment offers a faster heating rate than conventional heat treatment methods such as electric heating, allowing workpieces to reach the required temperature in a shorter time. Furthermore, electromagnetic induction heating cables are easy to install and can be flexibly arranged according to site requirements, making them more versatile. Especially for thick-walled pipes, due to their structural characteristics, electromagnetic induction heating provides a more efficient and uniform heat treatment effect. Currently, electromagnetic induction heating cables used in electromagnetic induction heat treatment include traditional copper core heating cables and silver-aluminum alloy heating cables.
[0003] Regarding the aforementioned technologies, the inventors believe that the following technical defects exist and require improvement:
[0004] Copper core heating cable: Current mainstream technology uses copper as the conductor material, which has high conductivity and good heat resistance, but it is also heavy (copper density 8.9g / cm³). 3 The copper core cable has problems such as high cost (large fluctuations in copper price), and the copper core cable is heavy and difficult to handle. It requires two construction workers to carry it during construction, which further increases the difficulty and cost of construction. As for the silver-aluminum alloy heating cable, although it has the advantage of being lightweight, its cost is extremely high, about 1,000 yuan / meter, and a single cable costs as much as 40,000 yuan (generally 40 meters long), making it difficult to widely use in heat treatment operations in construction. Utility Model Content
[0005] This application provides an electromagnetic induction heating cable to improve the following technical problems:
[0006] Traditional copper core heating cables are heavy, expensive, and difficult to handle, while traditional silver-aluminum alloy heating cables are extremely expensive, making them difficult to widely apply in heat treatment operations during construction.
[0007] This application provides an electromagnetic induction heating cable, which adopts the following technical solution:
[0008] An electromagnetic induction heating cable includes a rare-earth aluminum alloy conductor core, a high-temperature resistant insulation layer, and a high-temperature resistant fiber tube. The rare-earth aluminum alloy conductor core is a spiral structure formed by stranding multiple rare-earth aluminum alloy core wires. The inner core of the rare-earth aluminum alloy core wire is aluminum wire, and the outer peripheral wall of the aluminum wire is covered with a rare-earth layer. The high-temperature resistant insulation layer is wrapped around the outer peripheral wall of the rare-earth aluminum alloy conductor core. The high-temperature resistant fiber tube is wrapped around the outside of the high-temperature resistant insulation layer, and the ends of adjacent high-temperature resistant fiber tubes are detachably connected by aluminum connectors. The gap between the inner wall of the high-temperature resistant fiber tube and the high-temperature resistant insulation layer is between 0.05-0.50 mm.
[0009] In one feasible technical solution of this application, the rare earth aluminum alloy conductor core assembly includes a central core wire and a multi-layer wrapping core wire sleeve. The wrapping core wire sleeve is made of multiple strands of rare earth aluminum alloy core wires twisted together, and the number of rare earth aluminum alloy core wires used in the wrapping core wire sleeve is greater closer to the outer layer.
[0010] In one feasible technical solution of this application, the core wire sheath has 3-6 layers.
[0011] In one feasible technical solution of this application, the cross-sectional area of the rare earth aluminum alloy conductor core assembly is 100-150 mm². 2 Between these points, the diameter of the central core wire is 2-4 times the diameter of the rare earth aluminum alloy core wire.
[0012] In one feasible technical solution of this application, the high temperature resistance of the high temperature resistant insulation layer and the high temperature resistant fiber tube is between 600-1000℃, and the tensile strength of the high temperature resistant fiber tube is not less than 800MPa.
[0013] In one feasible technical solution of this application, the high-temperature resistant insulation layer is formed by wrapping high-temperature resistant mica tape, and the wrapping overlap rate is between 51% and 55% to form a double-layer heat insulation structure.
[0014] In one feasible technical solution of this application, the thickness of the high-temperature resistant insulating layer is between 0.3-0.4 mm.
[0015] In one feasible technical solution of this application, the high-temperature resistant fiber tube is woven from glass fiber tape or basalt fiber tape.
[0016] In one feasible technical solution of this application, the high-temperature resistant fiber tube includes an inner tube and an outer tube. The inner tube has a plain weave structure, and the outer tube has a twill weave structure. The fixing part of the aluminum joint clamps and adheres to the inner tube and the outer tube.
[0017] In one feasible technical solution of this application, the aluminum connector includes a male connector and a female connector, the male connector and the female connector are respectively connected to the two ends of the high temperature resistant fiber tube, and the male connector is connected to the adjacent female connector by means of plug-in assembly, threaded assembly, magnetic assembly or snap-fit assembly.
[0018] In summary, this application includes at least one of the following beneficial technical effects:
[0019] The weight of rare-earth aluminum alloy core wire is only about 50% of that of pure copper core wire, and its cost is about 60% of that of pure copper core wire and about 20% of that of silver aluminum alloy core wire. Therefore, the electromagnetic induction heating cable of this application is lightweight, low-cost, and easier to handle, making it suitable for widespread application in heat treatment operations during construction. Furthermore, the design for the rare-earth aluminum alloy core wire includes a high-temperature resistant insulation layer to reduce heat conduction to the high-temperature resistant fiber tube, ensuring that heat is concentrated on the workpiece. A detachable high-temperature resistant fiber tube is also included. When the outer layer of the electromagnetic induction heating cable of this application is damaged, the entire cable does not need to be scrapped; the corresponding aluminum connector can be removed and the appropriate high-temperature resistant fiber tube replaced, reducing maintenance costs by 70%. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a cross-sectional structural diagram of the electromagnetic induction heating cable according to an embodiment of this application.
[0022] Figure 2 This is a schematic diagram of the structure of the high-temperature resistant fiber tube in the embodiment of this application.
[0023] Figure 3 This is a schematic diagram of the aluminum connector in the embodiments of this application.
[0024] Figure 4 This is a schematic diagram of the structure of the high-temperature resistant insulating layer in the embodiments of this application.
[0025] Explanation of reference numerals in the attached figures:
[0026] 1. Rare earth aluminum alloy conductor core assembly; 11. Center core wire; 12. Core wire sheath;
[0027] 2. High-temperature resistant insulation layer; 21. High-temperature resistant mica tape;
[0028] 3. High-temperature resistant fiber tube; 31. Inner tube; 32. Outer tube;
[0029] 4. Aluminum connector; 41. Male connector; 42. Female connector. Detailed Implementation
[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0034] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0035] This application discloses an electromagnetic induction heating cable. (Refer to...) Figure 1-4 The electromagnetic induction heating cable includes a rare earth aluminum alloy conductor core 1, a high-temperature resistant insulation layer 2, and a high-temperature resistant fiber tube 3. The rare earth aluminum alloy conductor core 1 is a spiral structure formed by stranding multiple rare earth aluminum alloy core wires. The inner core of the rare earth aluminum alloy core wire is aluminum wire, and the outer peripheral wall of the aluminum wire is covered with a rare earth layer. The high-temperature resistant insulation layer 2 is wrapped around the outer peripheral wall of the rare earth aluminum alloy conductor core 1. The high-temperature resistant fiber tube 3 is wrapped around the outside of the high-temperature resistant insulation layer 2, and the ends of adjacent high-temperature resistant fiber tubes 3 are detachably connected by aluminum connectors 4. The gap between the inner wall of the high-temperature resistant fiber tube 3 and the high-temperature resistant insulation layer 2 is between 0.05-0.50 mm.
[0036] To ensure the structural strength of the rare-earth aluminum alloy conductor core assembly 1, the rare-earth aluminum alloy conductor core assembly 1 includes a central core wire 11 and multiple layers of wrapped core wire sleeves 12. The wrapped core wire sleeves 12 are made of multiple strands of rare-earth aluminum alloy core wires twisted together, and the number of rare-earth aluminum alloy core wires used in the wrapped core wire sleeves 12 is greater closer to the outer layer. The wrapped core wire sleeves 12 have 3-6 layers, and the cross-sectional area of the rare-earth aluminum alloy conductor core assembly 1 is 100-150 mm². 2 Between these layers, the diameter of the center core wire 11 is 2-4 times that of the rare-earth aluminum alloy core wire. This layered stranding structure significantly improves cable toughness and reduces the high-frequency skin effect.
[0037] In this embodiment, the high temperature resistance of the high temperature resistant insulation layer 2 and the high temperature resistant fiber tube 3 is between 600-1000℃, and the tensile strength of the high temperature resistant fiber tube 3 is not less than 800MPa.
[0038] The high-temperature resistant insulation layer 2 is formed by wrapping high-temperature resistant mica tape 21, with an overlap rate of 51%-55% to form a double-layer heat insulation structure. The thickness of the high-temperature resistant insulation layer 2 is between 0.3-0.4 mm. The high-temperature resistant insulation layer 2 designed above can reduce heat conduction to the outer layer, ensuring that heat is concentrated on the workpiece. Moreover, it has good flexibility and can more reliably adhere to the surface of the rare earth aluminum alloy conductor core assembly 1.
[0039] In this embodiment, the high-temperature resistant fiber tube 3 is woven from glass fiber tape or basalt fiber tape. The high-temperature resistant fiber tube 3 includes an inner tube 31 and an outer tube 32. The inner tube 31 has a plain weave structure, and the outer tube 32 has a twill weave structure. The fixing part of the aluminum connector 4 is clamped and bonded between the inner tube 31 and the outer tube 32.
[0040] The aluminum connector 4 includes a male connector 41 and a female connector 42. The male connector 41 and the female connector 42 are respectively connected to the two ends of the high-temperature resistant fiber tube 3. The male connector 41 is connected to the adjacent female connector 42 by means of plug-in assembly, threaded assembly, magnetic assembly or snap-fit assembly.
[0041] The high-temperature resistant fiber tube 3 designed above has high structural strength, good heat resistance, and long service life. Moreover, when combined with the aluminum connector 4, it can be quickly disassembled and replaced, reducing the later maintenance costs.
[0042] The beneficial technical effects of the electromagnetic induction heating cable of this application embodiment are roughly as follows:
[0043] The weight of the rare-earth aluminum alloy core wire is only about 50% of that of the pure copper core wire, and the cost of the rare-earth aluminum alloy core wire is about 60% of that of the pure copper core wire and about 20% of that of the silver aluminum alloy core wire. Therefore, the electromagnetic induction heating cable of this application is lightweight, low-cost, and easier to handle, making it suitable for widespread application in heat treatment operations during construction. In addition, the design for the rare-earth aluminum alloy core wire also includes a high-temperature resistant insulation layer 2 to reduce heat conduction to the high-temperature resistant fiber tube 3, ensuring that the heat is concentrated on the workpiece. Furthermore, a detachable high-temperature resistant fiber tube 3 is added. When the outer layer of the electromagnetic induction heating cable of this application is damaged, it is not necessary to scrap the entire cable. The corresponding aluminum connector 4 can be removed and the corresponding high-temperature resistant fiber tube 3 can be replaced, reducing maintenance costs by 70%.
[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An electromagnetic induction heating cable, characterized in that, The device includes a rare earth aluminum alloy conductor core assembly (1), a high-temperature resistant insulation layer (2), and a high-temperature resistant fiber tube (3). The rare earth aluminum alloy conductor core assembly (1) is a spiral structure formed by stranding multiple rare earth aluminum alloy core wires. The inner core of the rare earth aluminum alloy core wire is an aluminum wire, and the outer peripheral wall of the aluminum wire is covered with a rare earth layer. The high-temperature resistant insulation layer (2) is wrapped around the outer peripheral wall of the rare earth aluminum alloy conductor core assembly (1). The high-temperature resistant fiber tube (3) is wrapped around the outside of the high-temperature resistant insulation layer (2), and the ends of adjacent high-temperature resistant fiber tubes (3) are detachably connected by an aluminum connector (4). The gap between the inner wall of the high-temperature resistant fiber tube (3) and the high-temperature resistant insulation layer (2) is between 0.05-0.50 mm.
2. The electromagnetic induction heating cable according to claim 1, characterized in that, The rare earth aluminum alloy conductor core assembly (1) includes a central core wire (11) and a multi-layer wrapping core wire sleeve (12). The wrapping core wire sleeve (12) is made of multiple strands of rare earth aluminum alloy core wires twisted together, and the wrapping core wire sleeve (12) closer to the outer layer uses more rare earth aluminum alloy core wires.
3. The electromagnetic induction heating cable according to claim 2, characterized in that, The core sheath (12) has 3-6 layers.
4. The electromagnetic induction heating cable according to claim 2, characterized in that, The cross-sectional area of the rare earth aluminum alloy conductor core group (1) is between 100-150 mm 2 The diameter of the center core wire (11) is 2-4 times the diameter of the rare earth aluminum alloy core wire.
5. The electromagnetic induction heating cable according to claim 1, characterized in that, The high temperature resistance of the high temperature resistant insulation layer (2) and the high temperature resistant fiber tube (3) is between 600-1000℃, and the tensile strength of the high temperature resistant fiber tube (3) is not less than 800MPa.
6. The electromagnetic induction heating cable according to claim 5, characterized in that, The high-temperature resistant insulation layer (2) is formed by wrapping high-temperature resistant mica tape (21) with an overlap rate of 51%-55% to form a double-layer heat insulation structure.
7. The electromagnetic induction heating cable according to claim 6, characterized in that, The thickness of the high-temperature resistant insulation layer (2) is between 0.3 and 0.4 mm.
8. The electromagnetic induction heating cable according to claim 5, characterized in that, The high-temperature resistant fiber tube (3) is woven from glass fiber tape or basalt fiber tape.
9. The electromagnetic induction heating cable according to claim 8, characterized in that, The high-temperature resistant fiber tube (3) includes an inner tube (31) and an outer tube (32). The inner tube (31) has a plain weave structure, and the outer tube (32) has a twill weave structure. The fixing part of the aluminum connector (4) is clamped and bonded between the inner tube (31) and the outer tube (32).
10. The electromagnetic induction heating cable according to claim 9, characterized in that, The aluminum connector (4) includes a male connector (41) and a female connector (42). The male connector (41) and the female connector (42) are respectively connected to the two ends of the high-temperature resistant fiber tube (3). The male connector (41) is connected to the adjacent female connector (42) by means of plug-in assembly, threaded assembly, magnetic assembly or snap-fit assembly.