A type of ultra-low loss semi-steel cable

Abstract

This utility model discloses an ultra-low loss semi-steel cable, belonging to the technical field of semi-steel cable. The semi-steel cable includes an inner conductor, an insulation layer, an outer conductor, and a sheath layer sequentially arranged outside the inner conductor. The outer conductor covers the outside of the insulation layer and includes a first copper layer, a nickel layer, and a second copper layer arranged sequentially from the inside to the outside. A micro-nano anti-reflective coating is applied to the outer surface of the outer conductor. An installation cylinder is fitted onto the end of the sheath layer. An annular installation groove is formed on the inner wall of one end of the installation cylinder. Multiple limiting blocks are arranged within the annular installation groove, and the limiting blocks are connected to the annular installation groove by springs. The outer conductor of this utility model is a composite structure of a first copper layer, a nickel layer, and a second copper layer arranged from the inside to the outside, with a micro-nano anti-reflective coating on its surface. The three-layer metal structure provides good conductivity, corrosion resistance, and shielding effectiveness. The micro-nano anti-reflective coating reduces signal reflection, enhances shielding, improves wear resistance and corrosion resistance, and optimizes the overall electromagnetic performance and durability of the cable.

Description

Technical Field

[0001] This utility model relates to the field of semi-steel cable technology, and more specifically, to an ultra-low loss semi-steel cable. Background Technology

[0002] The demands on signal transmission are becoming increasingly stringent in various fields, including radio frequency communication, microwave technology, optical communication, and semiconductor testing. Semi-rigid coaxial cables, as an important signal transmission medium, occupy an indispensable position in many fields due to their unique performance. Their development is closely linked to advancements in related technologies. As the requirements for transmission line performance continue to rise, semi-rigid coaxial cables have emerged and initially demonstrated their capabilities in military communication and radar systems. With the passage of time and technological innovation, their application scope has gradually expanded to civilian communication, satellite communication, aerospace exploration, and other fields. Existing semi-rigid coaxial cables are prone to oxidation and corrosion of the outer conductor in harsh environments such as high temperature, high humidity, and strong corrosion, affecting the cable's conductivity and shielding effect, and shortening its service life. Furthermore, the outer conductor of semi-rigid cables is susceptible to damage, leading to a decrease in shielding performance and consequently affecting the overall electrical performance of the cable. Therefore, we propose an ultra-low loss semi-rigid cable. Utility Model Content

[0003] The purpose of this invention is to provide an ultra-low loss semi-steel cable to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An ultra-low loss semi-steel cable includes an inner conductor, an insulation layer, an outer conductor and a sheath layer are sequentially disposed outside the inner conductor, the outer conductor is covered outside the insulation layer and includes a first copper layer, a nickel layer and a second copper layer sequentially disposed from the inside to the outside, and a micro-nano anti-reflection coating is provided on the outer surface of the outer conductor.

[0006] An installation cylinder is fitted onto the end of the sheath layer. An annular installation groove is formed on the inner wall of one end of the installation cylinder. Multiple limiting blocks are set in the annular installation groove. The limiting blocks are connected to the annular installation groove by springs. A through hole is formed on the limiting block. A limiting rod is inserted through the through hole. The extension direction of the limiting rod is parallel to the axis of the installation cylinder. The limiting rod slides with the installation cylinder and extends to the outside of the installation cylinder.

[0007] Preferably, an adjusting ring is provided at the end of the mounting cylinder, a groove is provided on the side of the adjusting ring, a rotating ring is provided in the groove, and a limiting rod is connected to the rotating ring.

[0008] Preferably, the inner conductor is made of high-purity oxygen-free copper, and the surface of the high-purity oxygen-free copper is coated with a silver plating layer.

[0009] The insulation layer is made of microporous polytetrafluoroethylene material with a foaming degree of 65%-85%, and the micropores of the insulation layer are filled with silica aerogel particles.

[0010] The outer surface of the outer conductor is coated with a micro-nano structure anti-reflective coating;

[0011] The sheath layer is made of low-smoke, halogen-free, flame-retardant polyolefin material, and shape memory alloy microfilaments are uniformly dispersed inside the sheath layer.

[0012] Preferably, an extension is provided at one end of the inner side of the adjusting ring, and a groove is provided on the inner wall of the end of the mounting cylinder, with the extension threaded into the groove.

[0013] Preferably, the outer wall of the sheath layer near the end has a limiting groove that mates with the limiting block.

[0014] Preferably, a first sealing ring is provided at both ends of the mounting cylinder, and a second sealing ring is also provided on the inner side of the mounting cylinder. The cross-section of the second sealing ring is an L-shaped structure.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] (1) This utility model sets a limiting block, spring and other structures inside the installation cylinder, and sets a limiting rod and an adjusting ring. When the installation cylinder is installed to the end of the sheath layer, the limiting rod is inserted into the through hole on the limiting block to prevent the limiting block from contacting the sheath layer, so that the connection between the installation cylinder and the end of the sheath layer is quick. When the installation cylinder is installed at the end of the sheath layer, the adjusting ring drives multiple limiting rods to pull outward so that the limiting rods do not contact the limiting block. Then the spring restores its elasticity and pushes the end of the limiting block into the limiting groove to realize the installation and fixation of the installation cylinder. The setting of the installation cylinder ensures that the connection of the cable end is convenient. The setting of the limiting block makes the installation of the installation cylinder stable and reliable, and it is not easy to loosen during the use of the cable.

[0017] (2) The inner conductor of this utility model is made of high-purity oxygen-free copper plated with silver and reinforced with nano-carbon fiber channels. The high-purity oxygen-free copper and silver plating reduce resistance and skin effect loss, while the nano-carbon fiber reinforced channels improve mechanical strength and conductivity and reduce electromagnetic wave scattering. Together, they enable the inner conductor to achieve low-loss signal transmission and high structural stability. The microporous structure reduces the dielectric constant and enhances insulation performance. Aerogel particles reduce micropore connectivity and prevent impurities from entering, achieving lightweight and flexibility while significantly reducing high-frequency signal dielectric loss and improving the long-term stability of the insulation layer. The outer conductor is a composite structure consisting of a first copper layer, a nickel layer, and a second copper layer from the inside out. The outer surface of the outer conductor is coated with a micro-nano anti-reflective coating. The three-layer metal structure provides good conductivity, corrosion resistance, and shielding effectiveness. The micro-nano anti-reflective coating reduces signal reflection, enhances shielding, improves wear resistance and corrosion resistance, and optimizes the overall electromagnetic performance and durability of the cable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram showing the connection between the mounting cylinder and the sheath layer of this utility model;

[0020] Figure 3 This is a cross-sectional view of the mounting cylinder of this utility model;

[0021] Figure 4 This is a schematic diagram showing the disassembled installation cylinder and adjusting ring of this utility model.

[0022] The following are the labels in the diagram: 1. Inner conductor; 2. Insulation layer; 3. Outer conductor; 4. Sheath layer; 401. Limiting groove; 5. First sealing ring; 6. Mounting cylinder; 601. Annular mounting groove; 7. Limiting block; 8. Spring; 9. Limiting rod; 10. Adjusting ring; 11. Rotating ring; 12. Extension; 13. Second sealing ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example:

[0025] Please see Figure 1-4 An ultra-low loss semi-steel cable includes an inner conductor 1, an insulation layer 2, an outer conductor 3, and a sheath layer 4 arranged sequentially outside the inner conductor 1. The outer conductor 3 covers the outside of the insulation layer 2 and includes a first copper layer, a nickel layer, and a second copper layer arranged sequentially from the inside to the outside. The outer conductor 3 is a composite structure of the first copper layer, the nickel layer, and the second copper layer arranged from the inside to the outside. A micro-nano anti-reflection coating is provided on the outer surface of the outer conductor 3. The three-layer metal structure provides good conductivity, corrosion resistance, and shielding effectiveness. The micro-nano anti-reflection coating reduces signal reflection, enhances shielding, improves wear resistance and corrosion resistance, and optimizes the overall electromagnetic performance and durability of the cable.

[0026] An installation cylinder 6 is fitted onto the end of the sheath layer 4. The installation cylinder 6 is used to connect the cable end to the connector. An annular installation groove 601 is formed on the inner wall of one end of the installation cylinder 6. Multiple limiting blocks 7 are set in the annular installation groove 601. The limiting blocks 7 are connected to the annular installation groove 601 by springs 8. The elastic force of the springs 8 pushes the limiting blocks 7 into close contact with the sheath layer 4, thereby fixing the position of the installation cylinder 6. A through hole is formed on the limiting block 7, and a limiting rod 9 is inserted through the through hole. The extension direction of the limiting rod 9 is parallel to the axis of the installation cylinder 6. The limiting rod 9 slides with the installation cylinder 6 and extends to the outside of the installation cylinder 6. When the installation cylinder 6 is installed onto the end of the sheath layer 4, the limiting rod 9 is inserted into the through hole on the limiting block 7, so that the limiting block 7 is located in the annular installation groove 601. The springs 8 are in a compressed state, which makes it easy to fit the installation cylinder 6 onto the end of the sheath layer 4. Among them, the outer wall of the sheath layer 4 near the end has a limiting groove 401 that cooperates with the limiting block 7. When the mounting cylinder 6 is fitted on the end of the sheath layer 4, the limiting rod 9 is pulled outward so that it does not contact the limiting block 7. Then the spring 8 restores its elasticity and pushes the end of the limiting block 7 into the limiting groove 401, thereby realizing the installation and fixing of the mounting cylinder 6.

[0027] In this application, an adjusting ring 10 is provided at the end of the mounting cylinder 6. A sliding groove is provided on the side of the adjusting ring 10, and a rotating ring 11 is provided in the sliding groove. The limiting rod 9 is connected to the rotating ring 11. By moving the adjusting ring 10, multiple limiting rods 9 are moved outward at the same time, so that the limiting rods 9 slide out from the through hole of the limiting block 7.

[0028] In this application, an extension portion 12 is provided at one end of the inner side of the adjusting ring 10, and a groove is provided on the inner wall of the end of the mounting cylinder 6. The extension portion 12 is threadedly engaged with the groove to connect the adjusting ring 10 and the mounting cylinder 6. By rotating the adjusting ring 10, the adjusting ring 10 moves outward. Since the rotating ring 11 is rotatably connected to the adjusting ring 10, and the limiting rod 9 is connected to the adjusting ring 10, the rotating ring 11 will not rotate with the adjusting ring 10. However, the adjusting ring 10 restricts the horizontal position of the rotating ring 11. Therefore, when the adjusting ring 10 rotates and moves outward at the end, it drives the rotating ring 11 to move axially, thereby driving multiple limiting rods 9 to move, thus separating the limiting rods 9 from the limiting block 7. The inner wall of the extension portion 12 can be clearance-fitted with the surface of the sheath layer 4 so that the adjusting ring 10 will not rub against the surface of the sheath layer 4 when it rotates.

[0029] In this application, the inner conductor 1 is made of high-purity oxygen-free copper. The surface of the high-purity oxygen-free copper is coated with a silver plating layer. The high-purity oxygen-free copper provides a low-resistance channel, and the silver plating layer further reduces the surface resistance and reduces the skin effect loss of high-frequency signals.

[0030] The insulation layer 2 is made of microporous polytetrafluoroethylene material with a foaming degree of 65%-85%. The micropores of the insulation layer 2 are filled with silica aerogel particles. Polytetrafluoroethylene itself has excellent insulation properties, and the microporous structure further increases the internal air gap, improving insulation resistance and voltage withstand capability. The filled silica aerogel particles not only do not affect the insulation performance, but also reduce the interconnection between micropores, prevent moisture or impurities from entering, and improve the long-term stability of the insulation layer.

[0031] The outer surface of the outer conductor 3 is provided with a micro-nano structured anti-reflective coating. The composite structure of this coating and the outer conductor can optimize the transmission characteristics of electromagnetic waves on the cable surface, making it more difficult for external electromagnetic interference to penetrate into the cable, while suppressing internal signal leakage.

[0032] The sheath layer 4 is made of low-smoke halogen-free flame-retardant polyolefin material, with shape memory alloy microfilaments uniformly dispersed inside. The low-smoke halogen-free flame-retardant polyolefin material does not produce toxic hydrogen halide gas or large amounts of dense smoke during combustion, reducing injury to personnel and corrosion to equipment in the event of a fire. The uniformly dispersed shape memory alloy microfilaments (such as nickel-titanium alloy) restore the original shape when the cable is bent or deformed by external force and the temperature rises to its phase transition temperature, thus resetting the sheath layer, reducing permanent deformation, maintaining the overall structural integrity of the cable, and ensuring the stable performance of each internal layer.

[0033] In this application, a first sealing ring 5 is provided at both ends of the mounting cylinder 6 to achieve a sealed connection between the mounting cylinder 6 and the sheath layer 4 and the end of the inner conductor 1. A second sealing ring 13 is also provided on the inner side of the mounting cylinder 6. The cross-section of the second sealing ring 13 is an L-shaped structure. The side of the second sealing ring 13 and the end of the sheath layer 4 are in contact with the outer wall to further achieve the sealing performance of the connection.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An ultra-low-loss semi-steel cable, characterized in that, It includes an inner conductor (1), an insulating layer (2), an outer conductor (3) and a sheath layer (4) are sequentially disposed outside the inner conductor (1), the outer conductor (3) includes a first copper layer, a nickel layer and a second copper layer arranged sequentially from the inside to the outside, and a micro-nano anti-reflection coating is provided on the outer surface of the outer conductor (3); The end of the sheath layer (4) is fitted with an installation cylinder (6). An annular installation groove (601) is provided on the inner wall of one end of the installation cylinder (6). Multiple limiting blocks (7) are provided in the annular installation groove (601). The limiting blocks (7) are connected to the annular installation groove (601) by springs (8). A through hole is provided on the limiting block (7). A limiting rod (9) is provided through the through hole. The extension direction of the limiting rod (9) is parallel to the axis of the installation cylinder (6). The limiting rod (9) slides with the installation cylinder (6) and extends to the outside of the installation cylinder (6).

2. An ultra-low-loss semi-steel cable according to claim 1, characterized in that: An adjusting ring (10) is provided at the end of the mounting cylinder (6). A sliding groove is provided on the side of the adjusting ring (10). A rotating ring (11) is provided in the sliding groove. The limiting rod (9) is connected to the rotating ring (11).

3. An ultra-low-loss semi-steel cable according to claim 1, characterized in that: The inner conductor (1) is made of high-purity oxygen-free copper, and the surface of the high-purity oxygen-free copper is coated with a silver plating layer. The insulating layer (2) is made of microporous polytetrafluoroethylene material with a foaming degree of 65%-85%, and the micropores of the insulating layer (2) are filled with silica aerogel particles. The outer surface of the outer conductor (3) is provided with a micro-nano structured anti-reflective coating; The sheath layer (4) is made of low-smoke halogen-free flame-retardant polyolefin material, and shape memory alloy microfilaments are uniformly dispersed inside the sheath layer (4).

4. An ultra-low-loss semi-steel cable according to claim 2, characterized in that: An extension portion (12) is provided at one end of the inner side of the adjusting ring (10), and a groove is provided on the inner wall of the end of the mounting cylinder (6), with the extension portion (12) threadedly engaged with the groove.

5. An ultra-low-loss semi-steel cable according to claim 1, characterized in that: The sheath layer (4) has a limiting groove (401) near the end outer wall that cooperates with the limiting block (7).

6. An ultra-low-loss semi-steel cable according to claim 1, characterized in that: The mounting cylinder (6) is provided with a first sealing ring (5) at both ends, and a second sealing ring (13) is also provided on the inner side of the mounting cylinder (6). The cross-section of the second sealing ring (13) is an L-shaped structure.

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