Bend-resistant corrosion-resistant high-performance coaxial cable

Abstract

The utility model provides a kind of bending-resistant corrosion-resistant high-performance coaxial cable, including lead core and the insulating layer, shielding layer and outer sheath that are sequentially arranged outside lead core, the recess is equipped on the outer wall of the insulating layer, support strip is wound in the recess, the hardness of the support strip is greater than the hardness of the insulating layer, and the shielding layer forms protruding portion outside the support strip. By setting a spiral wound hard support strip outside the foamed material insulating layer, the support strip can reset the elastic support of the insulating layer, so that the insulating layer still has the effect of stable support shielding layer after frequent bending, and the shielding layer forms protruding portion outside the support strip, in the case of frequent bending, the metal wrapping belt can be extruded in the protruding portion to the inside support sleeve made of foamed material, to release the stress suffered when bending, to avoid tearing of metal wrapping belt due to frequent bending, which can ensure excellent shielding performance.

Description

Technical Field

[0001] This utility model relates to the field of wire and cable technology, and more specifically to a high-performance coaxial cable that is resistant to bending and corrosion. Background Technology

[0002] Coaxial cable is a widely used transmission medium in electronic communications. Its core structure, from the inside out, consists of a center conductor, an insulation layer, a metal shielding layer, and an outer sheath. This layered design gives it strong anti-interference capabilities, stable transmission, and high bandwidth. The metal shielding layer effectively shields against electromagnetic and radio frequency interference. Compared to twisted-pair cables, coaxial cables can support longer transmission distances at the same bandwidth. In short-distance or low-to-medium bandwidth scenarios, its cost is lower than that of optical fiber, and its installation and maintenance are simpler.

[0003] In some applications, coaxial cables need to maintain stable performance under repeated bending conditions. However, the bending performance of coaxial cables currently mainly relies on the elastomer sheath. But the recovery and support performance of the internal foam insulation layer will decrease under frequent bending conditions, and it cannot provide stable support for the outer shielding layer, thus affecting the overall shielding stability of the cable. Utility Model Content

[0004] In view of the defects and shortcomings of existing coaxial cables, this utility model proposes a high-performance coaxial cable that is resistant to bending and corrosion, comprising:

[0005] The conductor core consists of multiple intertwined wires;

[0006] An insulating layer covers the outside of the conductor core;

[0007] A shielding layer is wrapped around the outside of the insulating layer;

[0008] The outer sheath is extruded onto the outside of the shielding layer;

[0009] The outer wall of the insulating layer is provided with a groove, and a support strip is wound around the groove. The hardness of the support strip is greater than that of the insulating layer, and the shielding layer forms a protrusion on the outside of the support strip.

[0010] The shielding layer includes a metal wrapping tape. Along the width direction, the metal wrapping tape includes a central region and overlapping regions distributed on both sides of the central region. The overlapping regions of the metal wrapping tape are located between the winding paths of the support strip. The support strip protrudes from the surface of the insulating layer, and the central region of the metal wrapping tape forms the protrusion on the outside of the support strip.

[0011] Preferably, the metal wrapping tape includes aluminum foil wrapping tape or copper foil wrapping tape.

[0012] Preferably, the cross-sectional structure of the support strip is circular, and the diameter of the support strip is greater than the depth of the groove.

[0013] Preferably, the length ratio of the intermediate region to the overlapping region along the width direction is 3:2.

[0014] Preferably, the support strip includes a support core strip and a support sleeve, the hardness of the support core strip is greater than the hardness of the support sleeve, the hardness of the support sleeve is equal to the hardness of the insulation layer, and the thickness of the support sleeve is equal to the height by which the support sleeve protrudes from the surface of the insulation layer.

[0015] Preferably, the support core strip comprises a rigid plastic elastic strip, and the support sleeve and insulation layer comprise a foamed insulation sleeve.

[0016] Preferably, the rigid plastic elastic strip includes polyethylene, polyvinyl chloride, or thermoplastic elastomer plastic strips.

[0017] Preferably, the foamed insulating sleeve comprises foamed polyethylene or foamed polyurethane insulating sleeve.

[0018] Preferably, the thickness of the insulating layer is greater than the height of the groove.

[0019] Compared with the prior art, the significant advantages of the bending-resistant and corrosion-resistant high-performance coaxial cable proposed in this utility model are as follows:

[0020] In the design of this utility model of a high-performance coaxial cable with bending resistance and corrosion resistance, a spirally wound rigid support structure is set on the outside of the foamed insulation layer. This structure provides elastic support for the insulation layer, allowing it to maintain stable support for the shielding layer even after repeated and frequent bending. At the same time, the shielding layer forms a protrusion on the outside of the support strip. Under frequent bending, the metal wrapping tape can squeeze the support sleeve made of foamed material inward from the protrusion to release the stress during bending, thereby preventing the metal wrapping tape from tearing due to frequent bending and ensuring excellent shielding performance. Attached Figure Description

[0021] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the hierarchical structure of a high-performance coaxial cable that is resistant to bending and corrosion, as shown in an embodiment of this utility model.

[0023] Figure 2This is a schematic diagram of the cross-sectional structure of a bending-resistant and corrosion-resistant high-performance coaxial cable according to an embodiment of this utility model.

[0024] Figure 3 This is a schematic diagram of the internal structure of a high-performance coaxial cable that is resistant to bending and corrosion, as shown in an embodiment of this utility model.

[0025] The attached figures are labeled as follows:

[0026] 10. Conductor core; 11. Conductor wire; 20. Insulation layer; 201. Groove; 30. Shielding layer; 301. Protrusion; 40. Outer sheath; 50. Support bar; 51. Support core bar; 52. Support sleeve. Detailed Implementation

[0027] To better understand the technical content of this utility model, specific embodiments are provided below in conjunction with the accompanying drawings.

[0028] In current traditional coaxial cable designs, the insulation layer 20 is typically made of polyethylene or foamed plastic. However, polyethylene has high rigidity, resulting in insufficient cable flexibility, while foamed plastic insulation is too soft and cannot provide effective support for the shielding layer 30 after frequent bending, thus reducing the effectiveness of the cable's shielding layer 30. Therefore, this invention provides a bending-resistant and corrosion-resistant high-performance coaxial cable, comprising a conductor core 10, an insulation layer 20, a shielding layer 30, and an outer sheath 40.

[0029] like Figure 1 , Figure 2 and Figure 3 In the example shown, the conductor 10 includes multiple stranded wires 11. The wires 11 can be made of fine copper wires and are stranded in multiple layers in a regular twisting manner to form a conductor 10 with a circular cross-section.

[0030] The insulating layer 20 covers the outside of the conductor core 10. The insulating layer 20 is used to prevent the center conductor from short-circuiting with the shielding layer, while maintaining a stable characteristic impedance.

[0031] The shielding layer 30 is wrapped around the outside of the insulation layer 20. The shielding layer 30 is used to prevent external electromagnetic interference and suppress internal signal radiation of the cable, providing a low impedance loop for high-frequency current and reducing signal distortion.

[0032] In embodiments of this utility model, the outer sheath 40 is extruded onto the outside of the shielding layer 30, such as a PVC or PE outer sheath, to provide mechanical and environmental protection, such as resisting physical damage and preventing moisture, chemicals and ultraviolet radiation, thus achieving a corrosion-resistant effect.

[0033] As an optional implementation, since solid insulation has high hardness and high dielectric loss at high frequencies, in this example, the insulation layer 20 is made of foamed plastic material such as foamed polyethylene or foamed polyurethane insulation sleeve. In order to solve the problem that the foamed insulation layer cannot provide effective support for the shielding layer 30 after frequent and repeated bending due to its poor strength, a groove 201 is provided on the outer wall of the insulation layer 20, and a support strip 50 is wound in the groove 201. The hardness of the support strip 50 is greater than that of the insulation layer 20.

[0034] In some embodiments, the thickness of the insulating layer 20 is greater than the height of the groove 201, and the cross-sectional shape of the groove 201 is constructed as a rectangle, a circle, or a "V" shape.

[0035] In particular, after the insulation layer 20 is extruded, a cutting blade is used to continuously spirally cut the outer side of the insulation layer 20 to form a spiral groove 201 by means of hot cutting. The cross-sectional structure of the support bar 50 is circular, and the diameter of the support bar 50 is greater than the depth of the groove 201.

[0036] Thus, under the action of the support bar 50, the insulation layer 20 can be supported. The support bar 50 is set inside the insulation layer 20 and will not affect the flexibility of the cable. The support bar 50 provides elastic support for the insulation layer 20 to restore its position, so that the insulation layer 20 can still stably support the shielding layer 30 after multiple frequent bending.

[0037] Since the shielding layer 30 is formed by wrapping with metal tape, the metal tape is harder than the foam material. It is easy to wrinkle or even tear when repeatedly bent, which will damage the electrical performance of the cable. In order to avoid the metal tape tearing under frequent bending, the shielding layer 30 forms a protrusion 301 on the outside of the support bar 50.

[0038] Furthermore, the support strip 50 includes a support core strip 51 and a support sleeve 52. The hardness of the support core strip 51 is greater than that of the support sleeve 52. The hardness of the support sleeve 52 is equal to that of the insulation layer 20. The thickness of the support sleeve 52 is equal to the height by which the support sleeve 52 protrudes from the surface of the insulation layer 20.

[0039] In some embodiments, the support core strip 51 is made of rigid plastic elastic strip. Both the support sleeve 52 and the insulation layer 20 are made of foamed insulation sleeve. The support core strip 51 and the support sleeve 52 are pre-extruded and molded. After molding, the support sleeve 52 is fitted onto the outside of the support core strip 51. After the insulation layer 20 is extruded and the groove 201 is cut, the support strip 50 is wrapped around the outside of the insulation layer 20 along the path of the groove 201.

[0040] The rigid plastic elastic strips include polyethylene, polyvinyl chloride, or thermoplastic elastomer plastic strips, and the foamed insulating sleeves include foamed polyethylene or foamed polyurethane insulating sleeves.

[0041] Furthermore, the shielding layer 30 includes a metal wrapping tape. Along the width direction, the metal wrapping tape includes a central region and overlapping regions distributed on both sides of the central region. The overlapping regions of the metal wrapping tape are located between the winding paths of the support bar 50. The support bar 50 protrudes from the surface of the insulating layer 20, and the central region of the metal wrapping tape forms a protrusion 301 on the outside of the support bar 50.

[0042] In some embodiments, the metal wrapping tape can be made of aluminum foil or copper foil. The middle region of the metal wrapping tape forms a protrusion 301 on the outside of the support strip 50, so that the shielding layer 30 has a plurality of equally spaced protrusions 301 in the axial direction. The inner side of the protrusions 301 is a support sleeve 52 of a certain thickness. The metal wrapping tape can compress the support sleeve 52 made of foam material inward from the protrusions 301. In this way, the metal wrapping tape releases the stress it suffers when bending by compressing the support sleeve 52 and provides deformation space to avoid tearing of the metal wrapping tape due to frequent bending, thus ensuring excellent shielding performance.

[0043] In a preferred embodiment, the length ratio of the middle area to the overlapping area along the width direction is 3:2, that is, the wrapping overlap rate of the metal wrapping tape is 40%, which can ensure the continuity of shielding and structural integrity. In contrast, the overlap rate of conventionally set metal wrapping tape is about 20-30% when wrapping. If it is too high, the shielding layer is likely to tear easily when bent. This utility model can improve the wrapping overlap rate of the metal wrapping tape and enhance the shielding stability.

[0044] In conjunction with the above embodiments, by setting a spirally wound rigid support structure on the outside of the foamed insulating layer 20, the insulating layer 20 is provided with elastic support for resetting, so that the insulating layer 20 can still stably support the shielding layer 30 after multiple frequent bending. At the same time, the shielding layer 30 forms a protrusion 301 on the outside of the support strip 50. Under frequent bending, the metal wrapping tape can squeeze the support sleeve 52 made of foamed material inward on the protrusion 301 to release the stress during bending, so as to avoid tearing of the metal wrapping tape due to frequent bending, thus ensuring excellent shielding performance.

[0045] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A high-performance coaxial cable with bending resistance and corrosion resistance, characterized in that, include: The conductor (10) includes multiple intertwined wires (11). An insulating layer (20) covers the outside of the conductor (10); A shielding layer (30) is wrapped around the outside of the insulating layer (20); The outer sheath (40) is extruded onto the outside of the shielding layer (30); The outer wall of the insulating layer (20) is provided with a groove (201), and a support strip (50) is wound around the groove (201). The hardness of the support strip (50) is greater than that of the insulating layer (20), and the shielding layer (30) forms a protrusion (301) on the outside of the support strip (50).

2. The high-performance coaxial cable with bending resistance and corrosion resistance according to claim 1, characterized in that, The shielding layer (30) includes a metal wrapping tape. Along the width direction, the metal wrapping tape includes a central region and overlapping regions distributed on both sides of the central region. The overlapping regions of the metal wrapping tape are located between the winding paths of the support strip (50). The support strip (50) protrudes from the surface of the insulating layer (20) and the central region of the metal wrapping tape forms the protrusion (301) on the outside of the support strip (50).

3. The high-performance coaxial cable with bending resistance and corrosion resistance according to claim 2, characterized in that, The metal wrapping tape includes aluminum foil wrapping tape or copper foil wrapping tape.

4. The high-performance coaxial cable with bending resistance and corrosion resistance according to claim 2, characterized in that, The cross-section of the support bar (50) is circular, and the diameter of the support bar (50) is greater than the depth of the groove (201).

5. The high-performance coaxial cable with bending resistance and corrosion resistance according to claim 2, characterized in that, The length ratio of the intermediate region to the overlapping region along the width direction is 3.

2.

6. The high-performance coaxial cable with bending resistance and corrosion resistance according to any one of claims 1-5, characterized in that, The support bar (50) includes a support core bar (51) and a support sleeve (52). The hardness of the support core bar (51) is greater than that of the support sleeve (52). The hardness of the support sleeve (52) is equal to that of the insulation layer (20). The thickness of the support sleeve (52) is equal to the height by which the support sleeve (52) protrudes from the surface of the insulation layer (20).

7. The high-performance coaxial cable with bending resistance and corrosion resistance according to claim 6, characterized in that, The support core strip (51) includes a rigid plastic elastic strip, and the support sleeve (52) and the insulation layer (20) include a foamed insulation sleeve.

8. The high-performance coaxial cable with bending resistance and corrosion resistance according to claim 7, characterized in that, The rigid plastic elastic strip includes a thermoplastic elastomer plastic strip.

9. The high-performance coaxial cable with bending resistance and corrosion resistance according to claim 7, characterized in that, The foamed insulating sleeve includes a foamed polyurethane insulating sleeve.

10. The high-performance coaxial cable with bending resistance and corrosion resistance according to claim 1, characterized in that, The thickness of the insulating layer (20) is greater than the height of the groove (201).

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