CN212303189U

CN212303189U - Superfine coaxial cable

Info

Publication number: CN212303189U
Application number: CN202021233091.0U
Authority: CN
Inventors: 王乐俊; 黄艳平
Original assignee: Sun Round Technology Shenzhen Co ltd
Current assignee: Sun Round Technology Shenzhen Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-01-05
Anticipated expiration: 2030-06-30

Abstract

The utility model discloses a superfine coaxial cable technical field's a superfine coaxial cable, which comprises a conductor, the conductor outer wall has cup jointed the insulating layer, insulating layer outer wall has cup jointed the shielding layer, the shielding layer outer wall has cup jointed the skin, through adding one deck low density ePTFE micropore cable around the tape insulation layer on the conductor surface in the device, low density ePTFE micropore cable around the tape insulation layer with shielded conductor equipotential and with the good contact of insulating layer to avoid taking place partial discharge between conductor and insulating layer, low density ePTFE micropore cable had both had high tensile strength around the tape insulation layer, and is soft like the cotton again simultaneously, has self-resuming nature after impaired.

Description

Superfine coaxial cable

Technical Field

The utility model relates to an extremely thin coaxial cable technical field specifically is an extremely thin coaxial cable.

Background

When the cable is bent, the surface of an insulating layer of the cable is stretched under the action of tension, so that an air gap is easily formed between a conductor and the insulating layer formed by twisting a plurality of conducting wires, the surface of the conductor is not smooth, electric field concentration can be caused, if partial discharge exists, submicroscopic cracks are generated due to surface bending stress, the initiation of electric branches is caused, or new cracks are caused by partial discharge corrosion on the surface, new branches are initiated, and therefore, the ultrafine coaxial cable is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an extremely thin coaxial cable to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a superfine coaxial cable, includes the conductor, the conductor outer wall has cup jointed the insulating layer, insulating layer outer wall has cup jointed the shielding layer, the shielding layer outer wall has cup jointed the skin, the insulating layer is including the internal insulation layer of cover at the conductor outer wall, internal insulation layer outer wall has cup jointed the external insulation layer, and external insulation layer outer wall and shielding layer inner wall fixed connection, the shielding layer is including cup jointing the internal shield layer at insulating layer outer wall, the internal shield layer outer wall has cup jointed the external shielding layer, the fluting has evenly been seted up to the external shield layer inner wall, internal shield layer outer wall evenly is provided with the lug, and the lug is located grooved inner chamber.

Preferably, the inner insulating layer is a low-density ePTFE microporous cable wrapping tape insulating layer, and the outer insulating layer is a PET self-adhesive tape insulating layer.

Preferably, the number of the bumps is four, and the four bumps are arranged in an annular array.

Compared with the prior art, the beneficial effects of the utility model are that:

1. in the device, a layer of low-density ePTFE microporous cable wrapping tape insulating layer is added on the surface of a conductor, and the low-density ePTFE microporous cable wrapping tape insulating layer is equipotential to the shielded conductor and is in good contact with the insulating layer, so that partial discharge between the conductor and the insulating layer is avoided, the low-density ePTFE microporous cable wrapping tape insulating layer has extremely high tensile strength, is soft like cotton and has self-recovery after being damaged;

2. the outer insulating layer is arranged on the outer wall of the inner insulating layer to form a complete insulating layer, so that the low-density ePTFE microporous cable wrapping tape insulating layer damaged in the production process of the high-speed wrapping tape can be repaired, the low-density ePTFE microporous cable wrapping tape insulating layer is protected from being damaged by the shielding alloy copper wire, and the insulating resistance is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a conductor; 2. an insulating layer; 21. an inner insulating layer; 22. an outer insulating layer; 3. a shielding layer; 31. an outer shield layer; 32. an inner shield layer; 4. grooving; 5. an outer layer; 6. and (4) a bump.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

the utility model provides a technical scheme: referring to fig. 1, the ultra-thin coaxial cable includes a conductor 1, wherein the conductor 1 is formed by twisting a plurality of silver-plated copper alloy wires;

referring to fig. 1, an insulating layer 2 is sleeved on the outer wall of a conductor 1, a shielding layer 3 is sleeved on the outer wall of the insulating layer 2, an outer layer 5 is sleeved on the outer wall of the shielding layer 3, and the outer layer 5 is made of polyvinyl chloride or teflon;

referring to fig. 1, an insulation layer 2 includes an inner insulation layer 21 covering the outer wall of a conductor 1, an outer insulation layer 22 is covered on the outer wall of the inner insulation layer 21, the outer wall of the outer insulation layer 22 is fixedly connected with the inner wall of a shielding layer 3, the inner insulation layer 21 is a low-density ePTFE microporous cable wrapping tape insulation layer, the low-density ePTFE microporous cable wrapping tape is prepared from polytetrafluoroethylene dispersion resin, the outer insulation layer 22 is a PET self-adhesive tape insulation layer, the low-density ePTFE microporous cable wrapping tape insulation layer is equipotential to the shielded conductor 1 and is in good contact with the insulation layer, thereby avoiding partial discharge between the conductor 1 and the insulation layer 2, the low-density ePTFE microporous cable wrapping tape insulation layer has extremely high tensile strength, is soft like cotton, has self-recovery after being damaged, and cannot recover performance once being extruded, which is comparable to that of foamed PE, PP, fluoroplastic, etc, the PET self-adhesive tape is coated outside the low-density ePTFE microporous cable wrapping tape insulating layer, the PET self-adhesive tape is coated outside the inner insulating layer 21, the complete insulating layer 2 is formed by sintering the PET self-adhesive tape, the low-density ePTFE microporous cable wrapping tape insulating layer is further sintered, the damaged low-density ePTFE microporous cable wrapping tape insulating layer in the production process of a high-speed wrapping tape can be repaired, after the PET self-adhesive tape is sintered, the relative hardness of the PET self-adhesive tape is higher than that of the low-density ePTFE microporous cable wrapping tape insulating layer, the high-roundness insulating layer 2 can be formed, meanwhile, the low-density ePTFE microporous cable wrapping tape insulating layer is protected from being damaged by the shielding alloy copper;

referring to fig. 1, the shielding layer 3 includes an inner shielding layer 32 sleeved on the outer wall of the insulating layer 2, the inner shielding layer 32 is woven by an alloy copper wire, the outer shielding layer 31 is sleeved on the outer wall of the inner shielding layer 32, the outer shielding layer 31 is a composite copper foil layer, and by the double shielding effect of the inner shielding layer 32 and the outer shielding layer 31, the interference of the outside to the cable is isolated, and the normal operation of the cable is ensured.

Example 2:

referring to fig. 1, on the basis of embodiment 1, the inner wall of the outer shielding layer 31 is uniformly provided with slots 4, the outer wall of the inner shielding layer 32 is uniformly provided with bumps 6, and the bumps 6 are located in the inner cavity of the slots 4, so that the contact area between the outer shielding layer 31 and the inner shielding layer 32 is increased, the connection between the outer shielding layer 31 and the inner shielding layer 32 is more stable, the bumps 6 are made of rubber and arranged along the extension direction of the cable and have the same length as that of the cable, a buffering effect is achieved, the probability of damage to the inside of the cable when the cable is bent is reduced, the service life of the cable is prolonged, four groups of the bumps 6 are provided, and the four groups of the bumps 6 are arranged in an annular array;

compared with the embodiment 1, the parts such as the lug 6 and the slot 4 are added, the contact area between the outer shielding layer 31 and the inner shielding layer 32 is increased, the connection between the outer shielding layer 31 and the inner shielding layer 32 is more stable, a buffering effect is achieved, the probability of damage to the inside of the cable when the cable is bent is reduced, and the service life of the cable is prolonged.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An extremely thin coaxial cable comprising a conductor (1), characterized in that: insulating layer (2) has been cup jointed to conductor (1) outer wall, shielding layer (3) has been cup jointed to insulating layer (2) outer wall, outer layer (5) has been cup jointed to shielding layer (3) outer wall, insulating layer (2) are including cup jointing at the internal insulation layer (21) of conductor (1) outer wall, external insulation layer (22) have been cup jointed to internal insulation layer (21) outer wall, and external insulation layer (22) outer wall and shielding layer (3) inner wall fixed connection, shielding layer (3) are including cup jointing internal shield layer (32) at insulating layer (2) outer wall, external shield layer (31) have been cup jointed to internal shield layer (32) outer wall, fluting (4) have evenly been seted up to external shield layer (31) inner wall, internal shield layer (32) outer wall evenly is provided with lug (6), and lug (6) are located the inner chamber of fluting (4).

2. A very thin coaxial cable according to claim 1, characterized in that: the inner insulating layer (21) is a low-density ePTFE microporous cable wrapping tape insulating layer, and the outer insulating layer (22) is a PET self-adhesive tape insulating layer.

3. A very thin coaxial cable according to claim 1, characterized in that: the number of the lugs (6) is four, and the four lugs (6) are arranged in an annular array.