Small coaxial cable

Abstract

The utility model discloses a miniature coaxial cable, which comprises a conductor, at least one solid core strip is uniformly and sparsely wound outside the conductor at intervals, the conductor and the solid core strip are wrapped by an insulating layer, a shielding layer is wrapped outside the insulating layer, and an outer sheath is wrapped outside the shielding layer. According to the utility model, FEP (or PFA) solid core strips with the temperature grade of 200C are uniformly and sparsely wound on the surface of the conductor at intervals, and then a layer of FEP insulation is extruded, such a combined insulation mode is stable in insulation size and small in insulation dielectric constant, the transmission rate can be improved to 78% or more, the rated temperature of the wire is ensured not to be lower than 200C, and according to the size of the wire diameter of the core wire, the insulation performance of the wire is improved. And one or two or four FEP (or PFA) solid core strips can be selected to be sparsely wound at the same time, so that the production efficiency is improved, and meanwhile, the selection of production equipment is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to coaxial cable technical field, concretely is a small -size coaxial cable. BACKGROUND

[0002] The high temperature resistant coaxial line with the rated temperature reaching 200C, the insulating layer commonly uses fluorine plastic FEP, PFA or PTFE material even extrusion on the conductor surface, and the transmission rate is about 69%. In some high temperature resistant coaxial lines with transmission rate requirement >=78%, the commonly used mode is to use foamed FEP extrusion as the insulating layer, or foamed PTFE tape is wound around the conductor surface to make insulation to reduce the dielectric constant.

[0003] But because foamed FEP insulation needs to specially purchase the FEP material suitable for foaming, and the extrusion equipment used in production is relatively expensive, the investment is big. Foamed PTFE tape needs to be wound in multiple layers, and the winding efficiency is low, and the production cost is higher. For this purpose, we propose a small -size coaxial cable. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a small -size coaxial cable to solve the problems in the prior art.

[0005] To realize the above-mentioned purpose, the utility model provides the following technical scheme: a small -size coaxial cable, including the conductor, at least even interval of the conductor outer side is sparsely wound with a solid core strip, the conductor and solid core strip are covered through the insulating layer, the outer side of the insulating layer is wrapped with the shielding layer, the outer side of the shielding layer is wrapped with the outer sheath.

[0006] Preferably, the solid core strip adopts FEP solid core strip or PFA solid core strip.

[0007] Preferably, the solid core strip adopts 1, 2 or 4.

[0008] Preferably, the insulating layer adopts FEP insulating layer or PFA insulating layer.

[0009] Preferably, the shielding layer adopts metal copper wire weaving or oblique package.

[0010] Preferably, the outer sheath adopts FEP sheath or PFA sheath.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1. The FEP (or PFA) solid core strip with temperature rating of 200C is uniformly spaced and loosely wound on the surface of the conductor, and then a layer of FEP insulation is extruded. This combined insulation method has stable insulation size, small insulation dielectric constant, and transmission rate can be improved to 78% and above, ensuring that the rated temperature of the wire does not drop below 200C; according to the size of the core wire diameter, one or two or four FEP (or PFA) solid core strips can be selected for loose winding at the same time, which not only improves production efficiency, but also increases the selection of production equipment. BRIEF DESCRIPTION OF DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0014] Figure 1 is a structure diagram of one solid core strip and a conductor of the present application;

[0015] Figure 2 is a structure diagram of the cable when one solid core strip of the present application;

[0016] Figure 3 is a structure diagram of two solid core strips and a conductor of the present application;

[0017] Figure 4 is a structure diagram of the cable when two solid core strips of the present application;

[0018] Figure 5 is a structure diagram of four solid core strips and a conductor of the present application;

[0019] Figure 6 is a structure diagram of the cable when four solid core strips of the present application.

[0020] In the drawings: 1, conductor; 2, solid core strip; 3, insulation layer; 4, shielding layer; 5, outer sheath. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0022] Please refer to Figures 1-6 The utility model discloses a small -size coaxial cable, including conductor 1, the conductor 1 outside at least even interval is sparsely wound with a solid core strip 2, the solid core strip 2 adopts FEP solid core strip or PFA solid core strip, the solid core strip 2 adopts 1, 2 or 4, the conductor 1 and solid core strip 2 are covered by insulating layer 3, the insulating layer 3 adopts FEP insulating layer or PFA insulating layer, the outside of insulating layer 3 is wrapped with shielding layer 4, the shielding layer 4 adopts metal copper wire braiding or oblique package (shielding form can also adopt braiding structure or oblique package structure), the outside of shielding layer 4 is wrapped with outer sheath 5, and the outer sheath 5 adopts FEP sheath or PFA sheath.

[0023] FEP (or PFA) solid core strip with temperature grade 200C is evenly spaced and sparsely wound on the conductor surface, and then a layer of FEP insulation is extruded, and the combined insulation mode has stable insulation size, small insulation dielectric constant, transmission rate can be improved to 78% and above, and ensures that the rated temperature of the wire is not less than 200C. According to the size of the core wire, 1 or 2 or 4 FEP (or PFA) solid core strips can be selected to be sparsely wound at the same time, which improves the production efficiency and also increases the selection of production equipment.

[0024] The insulating layer is composed of two layers. The first layer is sparsely wound on the conductor surface by a general wrapping machine or braiding machine, and then a layer of insulation is extruded in the extruder, and the production efficiency is high. Because the material used is common and easy to obtain, and the production equipment selection is multiple, the comprehensive cost of the wire is low, and the competitive advantage is great.

[0025] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A small coaxial cable comprising a conductor (1), characterized in that: The conductor (1) is uniformly spaced and sparsely wound with a solid core strip (2) on the outside, the conductor (1) and the solid core strip (2) are covered by an insulation layer (3), the outside of the insulation layer (3) is wrapped with a shielding layer (4), the outside of the shielding layer (4) is wrapped with an outer sheath (5).

2. A miniature coaxial cable according to claim 1, characterized in that: The solid core strip (2) adopts FEP solid core strip or PFA solid core strip.

3. A miniature coaxial cable according to claim 1 or 2, characterized in that: The solid core strip (2) adopts 1, 2 or 4.

4. A miniature coaxial cable according to claim 1, wherein: The insulation layer (3) adopts FEP insulation layer or PFA insulation layer.

5. A miniature coaxial cable according to claim 1, wherein: The shielding layer (4) adopts metal copper wire weaving or diagonal wrapping.

6. A miniature coaxial cable according to claim 1, wherein: The outer sheath (5) adopts FEP sheath or PFA sheath.

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