Low-loss semi-steel cable

Abstract

This utility model discloses a low-loss semi-steel cable, belonging to the technical field of semi-steel cable. The semi-steel cable includes a conductor, an insulation layer, a semi-rigid shielding layer, and an outer sheath sequentially fitted around the conductor. An installation sleeve is fitted at the end of the outer sheath, and an O-ring seal is provided between the installation sleeve and the conductor. A first sealing ring is provided in a groove at one end of the installation sleeve located on the outer wall of the outer sheath, and multiple stops are provided on one side of the groove. A second sealing ring is provided in a mounting groove on one side of the installation sleeve. This utility model uses a combination structure of the first sealing ring and stops, and double fixation by an elastic telescopic connecting shaft and limiting bolts to ensure the sealing at the connection between the installation sleeve and the outer sheath. The addition of an O-ring seal between the conductor and the sleeve, and the second sealing ring at the end of the installation sleeve, achieves a tight seal with the connector, effectively preventing the intrusion of moisture, dust, etc., avoiding the risk of internal structure oxidation or short circuit due to moisture, and ensuring stable operation of the cable in outdoor or high-humidity environments.

Description

Technical Field

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

[0002] Semi-rigid coaxial cables play a crucial role as a high-performance microwave and millimeter-wave transmission medium in numerous fields such as communications, aerospace, and radar. Since the rise of microwave technology in the mid-20th century, the performance requirements for transmission lines have continuously increased. Initially, semi-rigid coaxial cables were mainly used in military communications and radar systems. With the development of the times and the advancement of technology, their application scope has continued to expand, gradually covering multiple fields such as civilian communications, satellite communications, and aerospace exploration, becoming the preferred transmission line in many fields.

[0003] With the increasing complexity of cable usage scenarios, existing cables have revealed numerous problems during practical use. For example, heavy objects often damage cables, significantly reducing their lifespan and causing considerable inconvenience to users. Furthermore, cables are inevitably subject to corrosion from surrounding water environments during use; once moisture enters the cable, it severely affects the stability of signal transmission. Simultaneously, the relatively smooth surfaces of existing cable connectors make them prone to loosening after connection with other components, leading to unstable conductor connections and further impacting signal transmission stability. Therefore, we propose a low-loss semi-steel cable. Utility Model Content

[0004] The purpose of this invention is to provide a low-loss semi-steel cable to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A low-loss semi-steel cable includes a conductor, an insulation layer, a semi-rigid shielding layer and an outer sheath are sequentially wrapped around the conductor, and the semi-rigid shielding layer is tightly attached to the outside of the insulation layer by longitudinal wrapping or spiral winding.

[0007] An installation sleeve is fitted onto the end of the outer sheath, and the conductor extends to the outside of the installation sleeve. An O-ring is provided between the installation sleeve and the conductor. A groove is provided at one end of the installation sleeve on the outer wall of the outer sheath, and a first sealing ring is provided in the groove. Multiple blocks are provided on one side of the groove. The blocks and the installation sleeve are rotatably connected by a connecting shaft, which is an elastic telescopic structure.

[0008] Preferably, an inner liner is provided between the insulation layer and the conductor, and the inner liner is made of thin polyimide film or polyester tape.

[0009] Preferably, the space between the insulating layer and the semi-rigid shielding layer is filled with a filler layer made of non-hygroscopic fibers or foam material.

[0010] Preferably, screw holes are provided at both ends of the stop block.

[0011] Preferably, the mounting sleeve has a mounting groove on one side of the conductor end, a second sealing ring is provided in the mounting groove, and multiple springs are also provided in the mounting groove, with the ends of the springs connected to the second sealing ring.

[0012] Preferably, the conductor is made of high-purity oxygen-free copper or silver-plated copper, and can be a single solid structure or a multi-stranded structure;

[0013] The insulation layer is mainly made of polytetrafluoroethylene;

[0014] The semi-rigid shielding layer is made of copper strip, copper alloy strip or thin stainless steel strip, and the surface is tin-plated, silver-plated or nickel-plated.

[0015] The outer sheath is made of fluororubber, silicone rubber, polyvinyl chloride or polyurethane.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] (1) The end of the installation sleeve of this utility model is provided with a combination structure of a first sealing ring and a stop block. The double fixation by the elastic telescopic connecting shaft and the limiting bolt ensures the sealing of the connection between the installation sleeve and the outer sheath. An O-ring is added between the conductor and the sleeve. A second sealing ring and a spring are provided at the end of the installation sleeve to achieve a tight seal with the connector, effectively preventing the intrusion of water vapor, dust and other substances, avoiding the risk of internal structure oxidation or short circuit, and ensuring the stable operation of the cable in outdoor or high humidity environments.

[0018] (2) The conductor of this utility model uses high-purity oxygen-free copper or silver-plated copper, combined with a polytetrafluoroethylene (PTFE) foamed insulation layer, which significantly reduces DC resistance and dielectric loss, effectively reduces signal attenuation in high-frequency transmission, and improves transmission efficiency and stability. The semi-rigid shielding layer is tightly attached to the insulation layer by longitudinal wrapping or spiral winding, and the surface is tin / silver / nickel plated to form a continuous shielding structure, which greatly improves electromagnetic shielding efficiency, effectively blocks external interference and prevents signal leakage, and is suitable for scenarios with strict electromagnetic compatibility requirements. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-section of the semi-steel cable of this utility model;

[0021] Figure 3 This is a cross-sectional view of the mounting sleeve of this utility model;

[0022] Figure 4 This is a side view of the mounting sleeve of this utility model;

[0023] Figure 5 For the present utility model Figure 4 Enlarged diagram of point A in the middle.

[0024] The following are the labels in the diagram: 1. Conductor; 2. Insulation layer; 3. Semi-rigid shielding layer; 4. Outer sheath; 5. Filler layer; 6. Inner liner; 7. Mounting sleeve; 8. First sealing ring; 9. Stop block; 10. Second sealing ring; 11. Spring; 12. O-ring. Detailed Implementation

[0025] 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.

[0026] Example:

[0027] Please see Figure 1-5 A low-loss semi-steel cable includes a conductor 1 for carrying current or signal transmission. An insulation layer 2, a semi-rigid shielding layer 3, and an outer sheath 4 are sequentially sleeved on the conductor 1. The semi-rigid shielding layer 3 is tightly attached to the outside of the insulation layer 2 by longitudinal wrapping or spiral winding. The insulation layer 2 tightly wraps the conductor 1 to achieve electrical isolation and reduce the dielectric loss of signal transmission. The semi-rigid shielding layer 3 provides electromagnetic shielding for the cable and imparts a certain rigidity to prevent signal interference and leakage. The outer sheath 4 protects the internal structure of the cable from damage by external physical and chemical factors.

[0028] An installation sleeve 7 is fitted onto the end of the outer sheath 4 for connection with a connector. The conductor 1 extends to the outside of the installation sleeve 7. An O-ring 12 is provided between the installation sleeve 7 and the conductor 1 to achieve a seal between the installation sleeve 7 and the conductor 1. A groove is provided at one end of the installation sleeve 7 on the outer wall of the outer sheath 4. A first sealing ring 8 is provided in the groove to achieve a seal when the end of the installation sleeve 7 is connected to the outer sheath 4. Multiple stops 9 are provided on one side of the groove. The stops 9 are rotatably connected to the installation sleeve 7 via a connecting shaft. The connecting shaft is an elastic telescopic structure. The stops 9 ensure that the first sealing ring 8 is in close contact with the groove at the end of the installation sleeve 7, thereby improving the sealing performance.

[0029] During installation, first, the first sealing ring 8 is fitted onto the outer sheath 4. Then, the stop block 9 is rotated to one side of the groove. After the installation sleeve 7 is fitted onto the end of the outer sheath 4, the first sealing ring 8 is pushed into the groove. Then, the stop block 9 is rotated so that one end of the stop block 9 presses against the surface of the first sealing ring 8. The connecting shaft has an elastic telescopic structure, which makes it easy to use the elastic force to push the first sealing ring 8 into close contact with the groove, making the seal more reliable.

[0030] In this application, an inner liner 6 is provided between the insulation layer 2 and the conductor 1. The inner liner 6 is made of thin polyimide film or polyester tape. The inner liner 6 is used to isolate the conductor 1 and the insulation layer 2, prevent the insulation layer 2 from being scratched by surface defects of the conductor 1, and ensure stable insulation performance.

[0031] In this application, a filling layer 5 made of non-hygroscopic fiber or foam material is filled between the insulation layer 2 and the semi-rigid shielding layer 3. The filling layer 5 is used to fill the gap, ensure the cable structure is compact, and reduce signal transmission loss fluctuations caused by internal structural vibration.

[0032] In one possible embodiment, the stop block 9 is provided with screw holes at both ends. Alternatively, a limiting bolt can be inserted into the screw hole, and the end of the bolt can be rotated to abut against the surface of the first sealing ring 8, thereby limiting the first sealing ring 8 and making it in close contact with the groove.

[0033] In this application, the mounting sleeve 7 has a mounting groove on one side of the conductor 1 end, and a second sealing ring 10 is provided in the mounting groove. Multiple springs 11 are also provided in the mounting groove, with the ends of the springs 11 connected to the second sealing ring 10. The surface of the mounting sleeve 7 has a threaded section for connection with the connector. The second sealing ring 10 ensures a sealed connection between the mounting sleeve 7 and the inside of the connector, and the springs 11 improve the sealing contact.

[0034] In this application, conductor 1 is made of high-purity oxygen-free copper or silver-plated copper, and can be a single solid structure or a multi-stranded structure, used to carry current or transmit signals; insulation layer 2 is made of polytetrafluoroethylene (PTFE) as the main material, formed by physical foaming or chemical foaming process, tightly wrapping conductor 1 to achieve electrical isolation and reduce dielectric loss of signal transmission; semi-rigid shielding layer 3 is made of copper strip, copper alloy strip or thin stainless steel strip, with tin-plated, silver-plated or nickel-plated surface treatment, and is tightly attached to the outside of insulation layer by longitudinal wrapping or spiral winding to form a continuous shielding structure; outer sheath 4 is made of fluororubber (FKM), silicone rubber (VMQ), polyvinyl chloride (PVC) or polyurethane (PU) material, which has good wear resistance, corrosion resistance and environmental aging resistance, protecting the internal structure of the cable from damage by external physical and chemical factors.

[0035] 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. A low-loss semi-steel cable, comprising a conductor (1), characterized in that: The conductor (1) is sequentially covered with an insulating layer (2), a semi-rigid shielding layer (3) and an outer sheath (4). The semi-rigid shielding layer (3) is tightly attached to the outside of the insulating layer (2) by longitudinal wrapping or spiral winding. An installation sleeve (7) is fitted onto the end of the outer sheath (4). The conductor (1) extends to the outside of the installation sleeve (7). An O-ring (12) is provided between the installation sleeve (7) and the conductor (1). A groove is provided at one end of the installation sleeve (7) on the outer wall of the outer sheath (4). A first sealing ring (8) is provided in the groove. A plurality of blocks (9) are provided on one side of the groove. The blocks (9) are rotatably connected to the installation sleeve (7) through a connecting shaft. The connecting shaft is an elastic telescopic structure. The mounting sleeve (7) has a mounting groove on one side of the conductor (1) end, and a second sealing ring (10) is provided in the mounting groove.

2. The low-loss semi-steel cable according to claim 1, characterized in that: An inner liner (6) is provided between the insulating layer (2) and the conductor (1), and the inner liner (6) is made of thin polyimide film or polyester tape.

3. The low-loss semi-steel cable according to claim 2, characterized in that: The space between the insulating layer (2) and the semi-rigid shielding layer (3) is filled with a filling layer (5) made of non-hygroscopic fiber or foam material.

4. The low-loss semi-steel cable according to claim 1, characterized in that: Screw holes are provided at both ends of the stop (9).

5. A low-loss semi-steel cable according to claim 1, characterized in that: The mounting groove is also provided with a plurality of springs (11), the ends of which are connected to the second sealing ring (10).

6. A low-loss semi-steel cable according to claim 1, characterized in that: The conductor (1) is made of high-purity oxygen-free copper or silver-plated copper, and can be a single solid structure or a multi-stranded structure. The insulating layer (2) is mainly made of polytetrafluoroethylene (PTFE); The semi-rigid shielding layer (3) is made of copper strip, copper alloy strip or thin stainless steel strip, and the surface is tin-plated, silver-plated or nickel-plated. The outer sheath (4) is made of fluororubber (FKM), silicone rubber (VMQ), polyvinyl chloride (PVC) or polyurethane (PU).

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