Extremely high temperature resistant cable special alloy conductor structure

Abstract

The utility model discloses a special alloy conductor structure of an extremely-high-temperature-resistant cable, which comprises a plurality of alloy conductors arranged on the inner side of a cable outer wrapping layer, a silicon carbide braid layer, an aluminum oxide ceramic coating arranged on the inner side of the silicon carbide braid layer and a tungsten-molybdenum-rhenium alloy core arranged on the inner side of the aluminum oxide ceramic coating. The supporting strip frame is arranged on the inner side of the cable outer wrapping layer and separates the alloy conductors, a filling layer is further filled between the supporting strip frame and the cable outer wrapping layer, the tungsten-molybdenum-rhenium alloy inner core is formed by twisting multiple strands of tungsten-molybdenum-rhenium alloy wires, and the tungsten-molybdenum-rhenium alloy wires comprise, by mass, 70%-80% of W, 15%-25% of Mo and 3%-8% of Re; according to the utility model, the tungsten-molybdenum-rhenium composite alloy is adopted as the special alloy conductor of the cable, and the multi-layer high-temperature-resistant insulation, mechanical support and heat dissipation structure design is combined, so that the heat-resistant temperature and mechanical performance of the cable can be effectively improved, the extremely-high-temperature-resistant effect is achieved, and the cable can be applied to special use places requiring extremely-high-temperature resistance.

Description

Technical Field

[0001] This utility model belongs to the field of high-temperature cable technology, specifically relating to a special alloy conductor structure for extremely high-temperature resistant cables. Background Technology

[0002] High-temperature cables are cables with multi-strand soft copper conductors. The use of heat-resistant and high-temperature wires and cables is generally determined by two needs: first, the cable must be able to transmit signals or electrical energy normally under high ambient temperatures for extended periods; second, it is used for power transmission cables, primarily to increase current carrying capacity.

[0003] Existing high-temperature resistant cables mainly use copper and nickel-based alloys as conductors, but they have the following drawbacks:

[0004] 1. Insufficient heat resistance limit: The melting point of traditional copper conductors is only 1083℃, which cannot meet the requirements of extreme high temperature; although nickel-based alloys are resistant to high temperature, their conductivity decreases significantly with increasing temperature.

[0005] 2. Poor structural stability: The conductor is prone to oxidation and softening at high temperatures, resulting in insufficient mechanical strength and affecting the stability of signal transmission.

[0006] 3. Poor heat dissipation: The conductors of traditional high-temperature resistant cables are not designed with structures that facilitate heat dissipation, which can easily reduce their service life if they operate at high temperatures for a long time.

[0007] Therefore, this utility model proposes a special alloy conductor structure for cables resistant to extremely high temperatures. Utility Model Content

[0008] The purpose of this invention is to provide a special alloy conductor structure for high-temperature resistant cables, in order to solve the problems mentioned in the background art, such as insufficient heat resistance limit, poor structural stability, and poor heat dissipation effect of existing high-temperature resistant cable conductors.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a special alloy conductor structure for high-temperature resistant cables, comprising...

[0010] Multiple alloy conductors disposed inside the cable outer sheath include a silicon carbide braided layer, an alumina ceramic coating disposed inside the silicon carbide braided layer, and a tungsten-molybdenum-rhenium alloy core disposed inside the alumina ceramic coating.

[0011] A support frame is installed inside the cable sheath to separate multiple alloy conductors, and a filler layer is also filled between the support frame and the cable sheath.

[0012] Preferably, the tungsten-molybdenum-rhenium alloy core is formed by stranding multiple strands of tungsten-molybdenum-rhenium alloy wires, and the mass percentage of the tungsten-molybdenum-rhenium alloy wires is: W 70%-80%, Mo 15%-25%, Re 3%-8%.

[0013] Preferably, the diameter of a single tungsten-molybdenum-rhenium alloy wire in the tungsten-molybdenum-rhenium alloy core is 0.08-0.12 mm, and the twisting angle of its multiple strands is 30°-45°.

[0014] Preferably, the thickness of the alumina ceramic coating is 0.2-0.5 mm.

[0015] Preferably, the alloy conductor further includes a high-temperature silicone rubber buffer layer disposed on the outside of the silicon carbide braided layer.

[0016] Preferably, the support frame is a hollow structure.

[0017] Preferably, the inner side of the support frame is provided with multiple integrated reinforcing ribs.

[0018] Preferably, the surface of the reinforcing rib has multiple through holes.

[0019] Compared with the prior art, the beneficial effects of this utility model are: This utility model uses a tungsten-molybdenum-rhenium composite alloy as the special alloy conductor of the cable, combined with multi-layer high-temperature insulation, mechanical support and heat dissipation structure design, which can effectively improve the heat resistance and mechanical properties of the cable, achieve the effect of extreme high temperature resistance, and can be applied to special applications that require extreme high temperature resistance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This utility model Figure 1 A magnified view of a portion of region A in the middle;

[0022] Figure 3 This is a cross-sectional view of the present invention;

[0023] Figure 4 This utility model Figure 3 A magnified view of a portion of region B in the middle;

[0024] Figure 5 This is a cross-sectional view of the alloy conductor of this utility model;

[0025] In the diagram: 1. Alloy conductor; 11. Silicon carbide braided layer; 12. Alumina ceramic coating; 13. Tungsten-molybdenum-rhenium alloy core; 14. High-temperature silicone rubber buffer layer; 2. Support frame; 21. Reinforcing rib; 22. Through hole; 3. Filler layer; 4. Cable outer sheath. Detailed Implementation

[0026] 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.

[0027] Example 1

[0028] Please see Figure 1 , Figure 2 , Figure 3 and Figure 5 This is the first embodiment of the present invention, which provides a technical solution: a special alloy conductor structure for extremely high temperature resistant cables, comprising...

[0029] Multiple alloy conductors 1 are disposed inside the outer sheath 4 of the cable, including a silicon carbide braided layer 11, an alumina ceramic coating 12 disposed inside the silicon carbide braided layer 11, and a tungsten-molybdenum-rhenium alloy core 13 disposed inside the alumina ceramic coating 12. The tungsten-molybdenum-rhenium alloy core 13 mainly plays the role of radiation resistance, thermal shock resistance, and adapting to frequent temperature fluctuations, while tungsten provides an ultra-high melting point (3422℃), molybdenum enhances conductivity (resistivity ≤0.05μΩ·m), and rhenium (melting point 3180℃) improves high-temperature toughness and inhibits grain growth.

[0030] A support frame 2 is set inside the cable outer sheath 4 to separate multiple alloy conductors 1. A filler layer 3 is also filled between the support frame 2 and the cable outer sheath 4. The filler material of the filler layer 3 is mainly glass fiber. Glass fiber has excellent high temperature resistance and mechanical strength and can remain stable in high temperature environment. The design of the support frame 2 can strengthen the support between multiple alloy conductors 1, increase the mechanical strength of the cable, and ensure that the cable is more stable under high temperature conditions.

[0031] In this embodiment, preferably, the tungsten-molybdenum-rhenium alloy core 13 is made of 19 strands of tungsten-molybdenum-rhenium alloy wires, which can increase the surface area and improve heat dissipation efficiency. The mass percentage of the tungsten-molybdenum-rhenium alloy wires is: W 75%, Mo 20%, Re 5%, which takes into account both conductivity and high-temperature stability.

[0032] In this embodiment, preferably, the diameter of a single tungsten-molybdenum-rhenium alloy wire in the tungsten-molybdenum-rhenium alloy core 13 is 0.1 mm, and its multi-strand twisting angle is 35°.

[0033] In this embodiment, preferably, the thickness of the alumina ceramic coating 12 is 0.3 mm, which mainly serves to isolate oxygen and prevent the tungsten-molybdenum-rhenium alloy core 13 from high-temperature oxidation.

[0034] In this embodiment, preferably, the alloy conductor 1 further includes a high-temperature silicone rubber buffer layer 14 disposed outside the silicon carbide braided layer 11 as the outermost insulating protection.

[0035] In this embodiment, preferably, the support frame 2 is a hollow structure, which allows air to flow inside, thereby playing a certain role in heat dissipation and cooling on the inside of the cable, and facilitating the dissipation of temperature when the alloy conductor 1 is at high temperature.

[0036] Example 2

[0037] Please see Figures 1 to 5 This is the second embodiment of the present invention, which provides a technical solution: a special alloy conductor structure for extremely high temperature resistant cables, comprising...

[0038] Multiple alloy conductors 1 are disposed inside the outer sheath 4 of the cable, including a silicon carbide braided layer 11, an alumina ceramic coating 12 disposed inside the silicon carbide braided layer 11, and a tungsten-molybdenum-rhenium alloy core 13 disposed inside the alumina ceramic coating 12. The tungsten-molybdenum-rhenium alloy core 13 mainly plays the role of radiation resistance, thermal shock resistance, and adapting to frequent temperature fluctuations, while tungsten provides an ultra-high melting point (3422℃), molybdenum enhances conductivity (resistivity ≤0.05μΩ·m), and rhenium (melting point 3180℃) improves high-temperature toughness and inhibits grain growth.

[0039] A support frame 2 is set inside the cable outer sheath 4 to separate multiple alloy conductors 1. A filler layer 3 is also filled between the support frame 2 and the cable outer sheath 4. The filler material of the filler layer 3 is mainly glass fiber. Glass fiber has excellent high temperature resistance and mechanical strength and can remain stable in high temperature environment. The design of the support frame 2 can strengthen the support between multiple alloy conductors 1, increase the mechanical strength of the cable, and ensure that the cable is more stable under high temperature conditions.

[0040] In this embodiment, preferably, the tungsten-molybdenum-rhenium alloy core 13 is made of 19 strands of tungsten-molybdenum-rhenium alloy wires, which can increase the surface area and improve heat dissipation efficiency. The mass percentage of the tungsten-molybdenum-rhenium alloy wires is: W 75%, Mo 20%, Re 5%, which takes into account both conductivity and high-temperature stability.

[0041] In this embodiment, preferably, the diameter of a single tungsten-molybdenum-rhenium alloy wire in the tungsten-molybdenum-rhenium alloy core 13 is 0.1 mm, and its multi-strand twisting angle is 35°.

[0042] In this embodiment, preferably, the thickness of the alumina ceramic coating 12 is 0.3 mm, which mainly serves to isolate oxygen and prevent the tungsten-molybdenum-rhenium alloy core 13 from high-temperature oxidation.

[0043] In this embodiment, preferably, the alloy conductor 1 further includes a high-temperature silicone rubber buffer layer 14 disposed outside the silicon carbide braided layer 11 as the outermost insulating protection.

[0044] In this embodiment, preferably, the support frame 2 is a hollow structure, which allows air to flow inside, thereby playing a certain role in heat dissipation and cooling on the inside of the cable, and facilitating the dissipation of temperature when the alloy conductor 1 is at high temperature.

[0045] In this embodiment, preferably, the inner side of the support frame 2 is provided with multiple integrated reinforcing ribs 21, which can ensure the stability of the hollow structure of the support frame 2 and prevent the support frame 2 from collapsing.

[0046] In this embodiment, preferably, the surface of the reinforcing rib 21 is provided with multiple through holes 22 to allow normal airflow, so as to ensure that the inner side of the support frame 2 is reinforced and supported, and that airflow is allowed to dissipate heat normally.

[0047] Example 3

[0048] Please see Figures 1 to 5 This is the third embodiment of the present invention, which provides a technical solution: a special alloy conductor structure for extremely high temperature resistant cables, comprising...

[0049] Multiple alloy conductors 1 are disposed inside the outer sheath 4 of the cable, including a silicon carbide braided layer 11, an alumina ceramic coating 12 disposed inside the silicon carbide braided layer 11, and a tungsten-molybdenum-rhenium alloy core 13 disposed inside the alumina ceramic coating 12. The tungsten-molybdenum-rhenium alloy core 13 mainly plays the role of radiation resistance, thermal shock resistance, and adapting to frequent temperature fluctuations, while tungsten provides an ultra-high melting point (3422℃), molybdenum enhances conductivity (resistivity ≤0.05μΩ·m), and rhenium (melting point 3180℃) improves high-temperature toughness and inhibits grain growth.

[0050] A support frame 2 is set inside the cable outer sheath 4 to separate multiple alloy conductors 1. A filler layer 3 is also filled between the support frame 2 and the cable outer sheath 4. The filler material of the filler layer 3 is mainly glass fiber. Glass fiber has excellent high temperature resistance and mechanical strength and can remain stable in high temperature environment. The design of the support frame 2 can strengthen the support between multiple alloy conductors 1, increase the mechanical strength of the cable, and ensure that the cable is more stable under high temperature conditions.

[0051] In this embodiment, preferably, the tungsten-molybdenum-rhenium alloy core 13 is made of 19 strands of tungsten-molybdenum-rhenium alloy wire, which can increase the surface area and improve heat dissipation efficiency. The mass percentage of the tungsten-molybdenum-rhenium alloy wire is: W 78%, Mo 18%, Re 6%, which takes into account both conductivity and high-temperature stability.

[0052] In this embodiment, preferably, the diameter of a single tungsten-molybdenum-rhenium alloy wire in the tungsten-molybdenum-rhenium alloy core 13 is 0.12 mm, and its multi-strand twisting angle is 40°.

[0053] In this embodiment, preferably, the thickness of the alumina ceramic coating 12 is 0.4 mm, which mainly serves to isolate oxygen and prevent the tungsten-molybdenum-rhenium alloy core 13 from high-temperature oxidation.

[0054] In this embodiment, preferably, the alloy conductor 1 further includes a high-temperature silicone rubber buffer layer 14 disposed outside the silicon carbide braided layer 11 as the outermost insulating protection.

[0055] In this embodiment, preferably, the support frame 2 is a hollow structure, which allows air to flow inside, thereby playing a certain role in heat dissipation and cooling on the inside of the cable, and facilitating the dissipation of temperature when the alloy conductor 1 is at high temperature.

[0056] In this embodiment, preferably, the inner side of the support frame 2 is provided with multiple integrated reinforcing ribs 21, which can ensure the stability of the hollow structure of the support frame 2 and prevent the support frame 2 from collapsing.

[0057] In this embodiment, preferably, the surface of the reinforcing rib 21 is provided with multiple through holes 22 to allow normal airflow, so as to ensure that the inner side of the support frame 2 is reinforced and supported, and that airflow is allowed to dissipate heat normally.

[0058] In summary, the preparation method of alloy conductor 1 is as follows:

[0059] 1. Alloy preparation:

[0060] The alloy rod with a diameter of φ2mm was obtained by using vacuum induction melting to melt tungsten, molybdenum and rhenium according to the proportions, casting the ingot and then hot forging and warm rolling multiple times.

[0061] 2. Drawing and twisting:

[0062] The alloy rod is drawn into a φ0.1mm fine wire using a diamond drawing die. The 19 fine wires are regularly twisted together with a pitch ratio of 12 to 15.

[0063] 3. Coating deposition:

[0064] Under liquid nitrogen cooling at -196℃, Al2O3 powder (particle size 50nm) was cold-sprayed using He gas, resulting in a coating porosity ≤0.5%.

[0065] 4. Braiding and Packaging:

[0066] SiC fibers (8μm in diameter) are woven in a 2 / 2 twill pattern with a coverage of ≥85%, and the outer layer can be made of silicone rubber (temperature resistant to 300℃) for cushioning.

[0067] Although embodiments of the present invention have been shown and described (see the detailed description above), 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. An ultra-high temperature resistant cable special alloy conductor structure characterized by: include Multiple alloy conductors (1) disposed inside the cable outer sheath (4) include a silicon carbide braided layer (11), an alumina ceramic coating (12) disposed inside the silicon carbide braided layer (11), and a tungsten-molybdenum-rhenium alloy core (13) disposed inside the alumina ceramic coating (12). A support frame (2) is set inside the cable sheath (4) to separate multiple alloy conductors (1), and a filler layer (3) is also filled between the support frame (2) and the cable sheath (4).

2. A special high temperature resistant cable conductor structure according to claim 1, characterized in that: The tungsten-molybdenum-rhenium alloy core (13) is made of multiple strands of tungsten-molybdenum-rhenium alloy wires twisted together.

3. A special high temperature resistant cable conductor structure according to claim 2, characterized in that: The diameter of a single tungsten-molybdenum-rhenium alloy wire in the tungsten-molybdenum-rhenium alloy core (13) is 0.08-0.12 mm, and the twisting angle of its multiple strands is 30°-45°.

4. A high temperature resistant cable special alloy conductor structure according to claim 1, characterized in that: The thickness of the alumina ceramic coating (12) is 0.2-0.5 mm.

5. A high temperature resistant cable special alloy conductor structure according to claim 1, characterized in that: The alloy conductor (1) also includes a high-temperature silicone rubber buffer layer (14) disposed outside the silicon carbide braided layer (11).

6. A high temperature resistant cable special alloy conductor structure according to claim 1, characterized in that: The support frame (2) is a hollow structure.

7. A high temperature resistant cable special alloy conductor structure according to claim 6, characterized in that: The inner side of the support frame (2) is provided with multiple integrated reinforcing ribs (21).

8. A special high temperature resistant cable conductor structure according to claim 7, characterized in that: The surface of the reinforcing rib (21) has multiple through holes (22).

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