CN207302734U - A kind of coaxial cable - Google Patents

Abstract

A kind of coaxial cable, it includes a central inner conductor, one layer of hollow insulating layer being wound on the center conductor, and one layer, around the outer conductor being wrapped on the outside of the hollow insulating layer, and is coated on the sheath on the outside of the outer conductor.The hollow insulating layer is a hollow tube.The cross section of the hollow tube includes a quadrilateral hole.Diameter using the maximum gauge of the square hole as the hollow insulating layer, the twisted lay ratio that the hollow insulating layer winds the center conductor are 58.Since the hollow insulating layer is made of the insulating materials with hollow tube, wherein filled with air, while so as to improve insulation performance, the diameter of the coaxial cable can also be reduced, so that the coaxial cable has broader practice scope.

Description

A kind of coaxial cable

Technical field

It the utility model is related to field of cables, more particularly to a kind of coaxial cable.

Background technology

With the development of science and technology, more and more fields have been applied to coaxial cable, or for transmission signal, Huo Zheyong To transmit the energy.Sometimes in some specific application fields, that is, require the coaxial cable that there is very big load capacity, while its Diameter dimension is also small.Such requirement is often opposite with the characteristic of existing coaxial cable, because existing coaxial electrical Cable is all often that load capacity is bigger, its diameter is also bigger, because when load capacity becomes larger, the not only diameter of inner and outer conductor It can become larger, while the incrementss of the thickness of the insulating layer between inner and outer conductor layer can also become much larger.

Utility model content

In view of this, it is necessary to a kind of more preferable coaxial cable that insulate is provided, to meet the demand.

A kind of coaxial cable, it includes a central inner conductor, one layer of hollow insulation being wound in the central inner conductor Layer, one layer, around the outer conductor being wrapped on the outside of the hollow insulating layer, and is coated on the sheath on the outside of the outer conductor.It is described hollow Insulating layer is a hollow tube.The cross section of the hollow tube includes a quadrilateral hole.It is straight with the maximum of the quadrilateral hole Footpath is the diameter of the hollow insulating layer, and the twisted lay ratio that the hollow insulating layer winds the center conductor is 5-8.

Further, the quadrilateral hole is square.

Further, the quadrilateral hole is rectangle.

Further, the central inner conductor is silver-plated soft circular copper wire.

Further, the quadrilateral hole is trapezoidal that the trapezoidal bottom is contacted with the central inner conductor.

Further, the outer conductor is wrapped on the hollow insulating layer by silver-plated copper bandlet and is formed.

Further, the outer conductor is identical with the winding direction of the hollow insulating layer.

Further, using the maximum outside diameter of the silver-plated copper bandlet as its diameter, the twisted lay ratio of the outer conductor is 3-5。

Further, the outer conductor by the silver-plated copper bandlet that is wrapped on the hollow insulating layer and is wrapped in the plating Silver-coated copper wire braiding layer on the outside of silver-bearing copper bandlet is formed.

Further, the sheath is made of perfluoroethylene-propylene.

Compared with prior art, since the hollow insulating layer is made of the insulating materials with hollow tube, fill out wherein Filled with air, while so as to improve insulation performance, the diameter of the coaxial cable can also be reduced, so that should Coaxial cable has broader practice scope.

Brief description of the drawings

The embodiment of the utility model is described below in conjunction with attached drawing, wherein：

Fig. 1 is a kind of structure diagram of coaxial cable provided by the utility model.

Fig. 2 is partial enlarged view of the coaxial cable of Fig. 1 at A.

Embodiment

Specific embodiment of the utility model is further elaborated below based on attached drawing.It should be appreciated that herein Described specific embodiment is only used as embodiment, is not used to limit the scope of protection of the utility model.

Please refer to Fig.1 and Fig. 2, it is a kind of structure diagram of coaxial cable provided by the utility model.It is described coaxial Cable, it includes a central inner conductor 10, one layer of hollow insulating layer 20 being wound on the center conductor 10, and one layer around being wrapped in The outer conductor 30 in the hollow outside of insulating layer 20, and it is coated on the sheath 40 in the outside of outer conductor 30.It is envisioned that The coaxial cable can also include other functional layers, such as be used for the color line of distinguishing characteristic, and be arranged on both ends Connector or plug, the technology known by its those skilled in the art, details are not described herein.

The central inner conductor 10 can be silver-plated soft circular copper wire, the specification of the copper wire should according to the actual requirements depending on, Such as the size of load voltage or electric current.In the present embodiment, a diameter of 1.1 millimeters of the copper wire.

The hollow insulating layer 20 is a hollow tube, it can be made of polytetrafluoroethylene (PTFE).The hollow tube it is cross-section Face includes a quadrilateral hole 21.Diameter using the maximum gauge of the quadrilateral hole as the hollow insulating layer 20, in described The twisted lay ratio that empty insulating layer 20 winds the center conductor is 5-8.The twisted lay ratio is in pitch length and this The ratio of the diameter of empty insulating layer 10, wherein, pitch length is one of a twisted wire on the axis direction of center conductor 10 Complete spiral spacing.The quadrilateral hole 21 is square, rectangle, can also be trapezoidal.When the quadrilateral hole 21 is When trapezoidal, which should contact with the central inner conductor 10.In the present embodiment, the quadrilateral hole 21 is length It is square.

The outer conductor 30 is wrapped in the hollow insulating layer by silver-plated copper bandlet and is formed.The specification of the copper bandlet also root Depending on actual needs, the size of such as load voltage or electric current.The outer conductor 30 is twined with the hollow insulating layer 20 It is identical around direction, with when being stretched its extension direction it is identical.It is described using the maximum outside diameter of the silver-plated copper bandlet as its diameter The twisted lay ratio of outer conductor 30 is 3-5.In the present embodiment, it is described in order to further enhance the stability of the coaxial cable Outer conductor 30 by the silver-plated copper bandlet 31 that is wrapped on the hollow insulating layer 20 and can also be wrapped in the silver-plated copper bandlet The silver-coated copper wire braiding layer 32 in 31 outsides is formed.

The sheath 40 is made of perfluoroethylene-propylene, it is coated on the lateral wall of the outer conductor 30 by extruding technique On.

Compared with prior art, since the hollow insulating layer 20 is made of the insulating materials with hollow tube, wherein Filled with air, while so as to improve insulation performance, the diameter of the coaxial cable can also be reduced, so that should Coaxial cable has broader practice scope.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this The spirit of utility model and interior the made all any modification, equivalent and improvement of principle etc., should be included in the utility model Protection domain within.

Claims (10)

1. A kind of 1. coaxial cable, it is characterised in that：The coaxial cable includes a central inner conductor, and one layer is wound in the center Hollow insulating layer on inner wire, one layer, around the outer conductor being wrapped on the outside of the hollow insulating layer, and is coated on the outer conductor The sheath in outside, the hollow insulating layer are a hollow tube, and the cross section of the hollow tube includes a quadrilateral hole, with institute The maximum gauge for stating quadrilateral hole is the diameter of the hollow insulating layer, and the hollow insulating layer winds the central inner conductor Twisted lay ratio is 5-8.
2. 2. coaxial cable as claimed in claim 1, it is characterised in that：The quadrilateral hole is square.
3. 3. coaxial cable as claimed in claim 1, it is characterised in that：The quadrilateral hole is rectangle.
4. 4. coaxial cable as claimed in claim 1, it is characterised in that：The quadrilateral hole to be trapezoidal, the trapezoidal bottom with The central inner conductor contact.
5. 5. coaxial cable as claimed in claim 1, it is characterised in that：The central inner conductor is silver-plated soft circular copper wire.
6. 6. coaxial cable as claimed in claim 1, it is characterised in that：The outer conductor by silver-plated copper bandlet be wrapped in it is described in Formed on empty insulating layer.
7. 7. coaxial cable as claimed in claim 6, it is characterised in that：The winding side of the outer conductor and the hollow insulating layer To identical.
8. 8. coaxial cable as claimed in claim 6, it is characterised in that：Maximum outside diameter using the silver-plated copper bandlet is straight as its Footpath, the twisted lay ratio of the outer conductor is 3-5.
9. 9. coaxial cable as claimed in claim 1, it is characterised in that：The outer conductor is by being wrapped on the hollow insulating layer Silver-plated copper bandlet and the silver-coated copper wire braiding layer that is wrapped on the outside of the silver-plated copper bandlet form.
10. 10. coaxial cable as claimed in claim 1, it is characterised in that：The sheath is made of perfluoroethylene-propylene.