A multi-layer composite shielded anti-intermodulation radio frequency coaxial cable

Abstract

This utility model discloses a multi-layer composite shielding structure for an anti-intermodulation radio frequency coaxial cable, including an inner conductor and an insulation layer mounted on the circular outer wall of the inner conductor. A copper tape shielding layer is disposed on the circular outer wall of the insulation layer, a mesh shielding layer is disposed on the circular outer wall of the copper tape shielding layer, an outer layer is disposed on the circular outer wall of the mesh shielding layer, an inner ring is disposed on the circular outer wall of the outer layer, and an outer ring is disposed on the circular outer wall of the inner ring. By installing the outer and inner rings, when the cable bends, the outer and inner rings can be moved to the bending point to shield the bending area, resisting external scratches, preventing sharp objects from directly contacting the cable, avoiding damage to the outer sheath, and thus protecting the internal shielding layer, insulation layer, and inner conductor from damage. Workers can quickly locate the bending point of the cable using the outer and inner rings, helping to focus attention on these relatively vulnerable areas.

Description

Technical Field

[0001] This utility model belongs to the field of communication-related technology, specifically relating to an anti-intermodulation radio frequency coaxial cable with a multi-layer composite shielding structure. Background Technology

[0002] Multi-layer composite shielded anti-intermodulation RF coaxial cable is a high-performance cable specifically designed to solve the problem of intermodulation interference during RF signal transmission. With the continuous development of modern communication technology and the intensive use of various wireless devices, intermodulation interference has become one of the key factors affecting communication quality. This cable, through its carefully designed multi-layer composite shielding structure, can effectively suppress the generation and propagation of intermodulation products, ensuring high-quality transmission of RF signals.

[0003] However, when a cable is bent, the internal structure of the bent part of the cable is constantly subjected to stresses such as tension, compression and torsion, which can easily cause bending fatigue. When it encounters a scratch with a heavy force, the cable will be damaged. Utility Model Content

[0004] The purpose of this invention is to provide an anti-intermodulation radio frequency coaxial cable with a multi-layer composite shielding structure, in order to solve the problem mentioned in the background art that when the cable is bent, the bent part of the cable is scratched by a relatively strong force, resulting in cable damage.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer composite shielding structure anti-intermodulation radio frequency coaxial cable, comprising an inner conductor and an insulating layer installed on the circular outer wall of the inner conductor;

[0006] A copper strip shielding layer is provided on the circular outer wall of the insulating layer;

[0007] A mesh shielding layer is provided on the circular outer wall of the copper strip shielding layer;

[0008] An outer layer is provided on the circular outer wall of the mesh shielding layer;

[0009] An inner ring is provided on the circular outer wall of the outer layer, and an outer ring is provided on the circular outer wall of the inner ring.

[0010] Preferably, a plurality of reinforcing ribs are provided between the outer ring and the inner ring.

[0011] Preferably, an outer frame a is fixedly connected between the left outer walls of the outer ring and the inner ring, and an outer frame b is fixedly connected between the right outer walls of the outer ring and the inner ring.

[0012] Preferably, the outer and inner rings are provided with creases on their circular outer walls to limit the stretching length of the outer and inner rings.

[0013] Preferably, the outer ring, reinforcing rib, inner ring, outer frame a, and outer frame b are all made of rubber material.

[0014] Preferably, the inner circular wall of the inner ring and the outer circular wall of the outer ring are fitted together.

[0015] Preferably, the inner conductor is made of oxygen-free copper and the insulating layer is made of polytetrafluoroethylene.

[0016] Preferably, both the copper strip shielding layer and the mesh shielding layer are made of copper alloy material, and the outer layer is made of polyurethane material.

[0017] Compared with the prior art, this utility model provides a multi-layer composite shielded anti-intermodulation radio frequency coaxial cable, which has the following beneficial effects:

[0018] By installing outer and inner rings, when the cable bends, the outer and inner rings can be moved to the bend location to shield it, resisting external scratches, preventing sharp objects from directly contacting the cable, avoiding damage to the outer sheath, and thus protecting the internal shielding layer, insulation layer, and inner conductor from damage. At the same time, the outer and inner rings, installed at the cable bend location, form a clear marker. During cable inspection, maintenance, or troubleshooting, personnel can quickly locate the bend location using the outer and inner rings, helping to focus on these relatively vulnerable areas and promptly identify potential problems. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a multi-layer composite shielding structure for an anti-intermodulation radio frequency coaxial cable according to the present invention.

[0020] Figure 2 This is a partial structural schematic diagram of the outer ring region side view of this utility model.

[0021] Figure 3 This is a frontal partial structural diagram of the outer ring region of this utility model.

[0022] In the diagram: 1. Inner conductor; 2. Insulating layer; 3. Copper strip shielding layer; 4. Mesh shielding layer; 5. Outer layer; 6. Outer ring; 7. Reinforcing rib; 8. Inner ring; 9. Outer frame a; 10. Outer frame b; 11. Crease. 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. 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.

[0024] This utility model provides, for example Figure 1-3 The multi-layer composite shielded anti-intermodulation radio frequency coaxial cable shown includes an inner conductor 1 and an insulating layer 2 installed on the circular outer wall of the inner conductor 1.

[0025] A copper strip shielding layer 3 is provided on the circular outer wall of the insulating layer 2;

[0026] A mesh shielding layer 4 is provided on the circular outer wall of the copper strip shielding layer 3;

[0027] An outer layer 5 is provided on the circular outer wall of the mesh shielding layer 4. In the field of use, it is laid according to the actual wiring requirements and the minimum bending radius requirement of the cable. After the equipment is powered on, the radio frequency signal is transmitted through the inner conductor 1 of the cable. During the signal transmission process, the signal transmission quality is monitored in real time by relevant monitoring equipment, including parameters such as signal amplitude, frequency, and intermodulation products. If abnormalities are found in the signal, such as excessive signal attenuation or excessive intermodulation interference, the cable needs to be inspected to determine whether it is caused by a problem with the cable itself. Each shielding layer can effectively block external electromagnetic interference from entering the cable and reduce the possibility of external interference signals interacting with the signals transmitted in the cable to generate intermodulation products. Secondly, the good conductivity and electromagnetic shielding performance of the shielding layer itself can quickly guide the intermodulation products generated inside the cable to the ground, avoiding their reflection and propagation in the cable, thereby reducing the impact of intermodulation interference on signal transmission.

[0028] An inner ring 8 is provided on the circular outer wall of the outer layer 5, and an outer ring 6 is provided on the circular outer wall of the inner ring 8. The outer ring 6 and the inner ring 8 are installed on the outer wall of the outer layer 5. When the cable bends, the outer ring 6 and the inner ring 8 can move to the bending part. The outer ring 6 has high hardness and strength and can resist physical damage such as scratches and collisions from the outside world, providing the first layer of physical protection for the cable. The inner ring 8 is relatively soft and elastic, and fits tightly against the bending part of the cable. It can buffer the stress generated during bending, distribute the bending stress evenly, and avoid stress concentration that could damage the internal structure of the cable.

[0029] like Figure 2 and Figure 3As shown, multiple reinforcing ribs 7 are provided between the outer ring 6 and the inner ring 8. An outer frame a9 is fixedly connected between the left outer walls of the outer ring 6 and the inner ring 8, and an outer frame b10 is fixedly connected between the right outer walls of the outer ring 6 and the inner ring 8. The circular outer walls of the outer ring 6 and the inner ring 8 are provided with creases 11 to limit the stretching length of the outer ring 6 and the inner ring 8. The outer ring 6, reinforcing ribs 7, inner ring 8, outer frame a9 and outer frame b10 are all made of rubber material. The circular inner wall of the inner ring 8 and the circular outer wall of the outer layer 5 are fitted together.

[0030] When the cable bends, the rubber outer ring 6 and inner ring 8 adapt to the bending deformation of the cable due to their elasticity. The reinforcing rib 7 enhances the structural stability between the outer ring 6 and inner ring 8, further dispersing bending stress. The outer ring 6 and inner ring 8 are connected as a whole, enhancing the stability of the entire protective structure. When the cable bends or is subjected to tensile force, the crease 11 will deform first, preventing damage to the rubber material due to excessive stretching and ensuring that it can always fit tightly against the cable, providing stable protection for the cable.

[0031] like Figure 1 As shown, the inner conductor 1 is made of oxygen-free copper, the insulation layer 2 is made of polytetrafluoroethylene, the copper strip shielding layer 3 and the mesh shielding layer 4 are both made of copper alloy, and the outer layer 5 is made of polyurethane.

[0032] Oxygen-free copper has extremely high electrical conductivity, which can effectively reduce resistance and reduce energy loss during signal transmission. Polytetrafluoroethylene has excellent electrical properties, and the storage and loss of electric field energy are relatively small when the signal is transmitted in it, thereby effectively reducing signal attenuation. Copper alloy improves the service life of copper strip shielding layer 3 and mesh shielding layer 4. Polyurethane outer layer 5 has excellent wear resistance, oil resistance and weather resistance, which can effectively protect the internal structure of the cable under harsh environmental conditions.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-layer composite shielded anti-intermodulation radio frequency coaxial cable, comprising an inner conductor (1) and an insulating layer (2) mounted on the circular outer wall of the inner conductor (1); A copper strip shielding layer (3) is provided on the circular outer wall of the insulating layer (2); A mesh shielding layer (4) is provided on the circular outer wall of the copper strip shielding layer (3); An outer layer (5) is provided on the circular outer wall of the mesh shielding layer (4); Its features are: The outer layer (5) has an inner ring (8) on its circular outer wall, and the inner ring (8) has an outer ring (6) on its circular outer wall.

2. The anti-intermodulation radio frequency coaxial cable with a multi-layer composite shielding structure according to claim 1, characterized in that: Multiple reinforcing ribs (7) are provided between the outer ring (6) and the inner ring (8).

3. The anti-intermodulation radio frequency coaxial cable with a multi-layer composite shielding structure according to claim 1, characterized in that: An outer frame a (9) is fixedly connected between the left outer wall of the outer ring (6) and the inner ring (8), and an outer frame b (10) is fixedly connected between the right outer wall of the outer ring (6) and the inner ring (8).

4. The anti-intermodulation radio frequency coaxial cable with a multi-layer composite shielding structure according to claim 1, characterized in that: The outer ring (6) and the inner ring (8) are both provided with creases (11) on their circular outer walls to limit the stretching length of the outer ring (6) and the inner ring (8).

5. The anti-intermodulation radio frequency coaxial cable with a multi-layer composite shielding structure according to claim 1, characterized in that: The outer ring (6), reinforcing rib (7), inner ring (8), outer frame a (9) and outer frame b (10) are all made of rubber material.

6. The anti-intermodulation radio frequency coaxial cable with a multi-layer composite shielding structure according to claim 1, characterized in that: The inner circular wall of the inner ring (8) and the outer circular wall of the outer layer (5) are fitted together.

7. The anti-intermodulation radio frequency coaxial cable with a multi-layer composite shielding structure according to claim 1, characterized in that: The inner conductor (1) is made of oxygen-free copper material, and the insulating layer (2) is made of polytetrafluoroethylene material.

8. The anti-intermodulation radio frequency coaxial cable with a multi-layer composite shielding structure according to claim 1, characterized in that: The copper strip shielding layer (3) and the mesh shielding layer (4) are both made of copper alloy material, and the outer layer (5) is made of polyurethane material.

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