Radio frequency coaxial cable with high withstand voltage level

Abstract

The utility model relates to the technical field of radio frequency coaxial cables, in particular to a radio frequency coaxial cable with a high withstand voltage level, which comprises an inner conductor, an insulating layer, an outer conductor and a sheath layer which are sequentially arranged from inside to outside, and an inorganic ceramic insulating layer is arranged on the surface of the inner conductor. According to the radio frequency coaxial cable with the high voltage withstanding grade, the inorganic ceramic insulating layer is arranged on the surface of the inner conductor, burrs and the like on the surface of the inner conductor can be covered, meanwhile, the inorganic ceramic insulating layer can improve the insulating effect, and the possibility that the insulating layer is broken down due to the fact that a large hole is formed in the foaming layer is avoided; by controlling the thickness of the inorganic ceramic insulating layer, the insulating performance of products of various specifications can be ensured, and the insulating and high-voltage-resistant capabilities of the cable are improved on the basis of the insulating and high-voltage-resistant capabilities.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency coaxial cable technology, and in particular to a high voltage withstand level radio frequency coaxial cable. Background Technology

[0002] The insulation layer of radio frequency (RF) coaxial cables is typically formed through foaming. However, large perforations can easily occur during the extrusion foaming process in the insulation manufacturing of RF coaxial cables, leading to subsequent insulation layer breakdown, resulting in current leakage or short circuits. Secondly, if burrs on the inner conductor surface are not properly removed during production, resulting in an uneven surface, this can also cause insulation withstand voltage failures during subsequent product testing. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to solve the technical problems in the prior art, this utility model provides a high voltage withstand level radio frequency coaxial cable.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a high voltage withstand level radio frequency coaxial cable, comprising an inner conductor, an insulation layer, an outer conductor and a sheath layer arranged sequentially from the inside out, wherein the surface of the inner conductor is provided with an inorganic ceramic insulation layer.

[0005] This utility model discloses a high-voltage-resistant radio frequency coaxial cable. By setting an inorganic ceramic insulation layer on the surface of the inner conductor, burrs and other defects on the surface of the inner conductor can be covered. At the same time, the inorganic ceramic insulation layer can improve the insulation effect and avoid the possibility of the insulation layer being broken down due to large perforations in the foam layer. In addition, by controlling the thickness of the inorganic ceramic insulation layer, the insulation performance of products of various specifications can be ensured, and the high-voltage insulation resistance of the cable can be improved on this basis.

[0006] Furthermore, the inorganic ceramic insulating layer is made of inorganic ceramic insulating varnish.

[0007] Furthermore, the thickness of the inorganic ceramic insulating layer is 0.1-0.5 mm.

[0008] Furthermore, the inorganic ceramic insulating layer has the insulation properties to withstand voltages of 5000-100000V.

[0009] Furthermore, the outer conductor is an annular corrugated outer conductor with an annular groove.

[0010] Furthermore, the outer surface of the insulating layer and the inner surface of the outer conductor are both bonded together in annular wrinkle pattern.

[0011] Furthermore, the inner surface of the sheath layer and the outer surface of the outer conductor are both in a ring-shaped wrinkle pattern.

[0012] Furthermore, a tear cord is provided between the sheath layer and the outer conductor.

[0013] Furthermore, the tear cord passes through each annular groove on the outer conductor.

[0014] Furthermore, the tear rope is made of Kevlar fiber.

[0015] The beneficial effects of this utility model are that by setting an inorganic ceramic insulation layer on the surface of the inner conductor, burrs and other defects on the surface of the inner conductor can be covered. At the same time, the inorganic ceramic insulation layer can improve the insulation effect and avoid the possibility of the insulation layer being broken down due to large perforations in the foam layer. In addition, by controlling the thickness of the inorganic ceramic insulation layer, the insulation performance of products of various specifications can be ensured, and on this basis, the high voltage resistance of the cable insulation is improved. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram illustrating the overall structure of a high-voltage-resistant radio frequency coaxial cable in this utility model.

[0018] In the diagram: 1. Inner conductor; 2. Insulation layer; 3. Outer conductor; 31. Annular groove; 4. Sheath layer; 5. Inorganic ceramic insulation layer; 6. Tear rope. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] This utility model discloses a high-voltage-resistant radio frequency coaxial cable.

[0022] Reference Figure 1 A high-voltage-resistance radio frequency coaxial cable includes, from the inside out, an inner conductor 1, an insulation layer 2, an outer conductor 3, and a sheath layer 4. An inorganic ceramic insulation layer 5 is provided on the surface of the inner conductor 1. By providing the inorganic ceramic insulation layer 5 on the surface of the inner conductor 1, burrs and other imperfections on the surface of the inner conductor 1 can be covered. Simultaneously, the inorganic ceramic insulation layer 5 improves the insulation effect, preventing the insulation layer 2 from being punctured due to large perforations in the foam layer. Furthermore, by controlling the thickness of the inorganic ceramic insulation layer 5, the insulation performance of products of various specifications can be ensured, thereby improving the cable's high-voltage insulation resistance.

[0023] Specifically, the inorganic ceramic insulation layer 5 is made of inorganic ceramic insulating varnish. The thickness of the inorganic ceramic insulation layer 5 is 0.1-0.5mm. The thickness varies depending on the voltage rating of the finished cable; smaller cables have lower voltage ratings, while larger cables require higher voltage ratings. The thickness of the inorganic ceramic insulation layer 5 is controlled according to the cable's size. The insulation performance of the inorganic ceramic insulation layer 5 is designed to withstand voltages of 5000-100000V. Industry standards specify insulation voltages for each cable, ranging from 2000-15000V, but this application's voltage is significantly higher.

[0024] It should be noted that the outer conductor 3 is an annular corrugated outer conductor 3 with annular grooves 31. The outer surface of the insulation layer 2 and the inner surface of the outer conductor 3 are both in annular corrugated shape. The inner surface of the sheath layer 4 and the outer surface of the outer conductor 3 are both in annular corrugated shape.

[0025] Furthermore, a tear cord 6 is provided between the sheath layer 4 and the outer conductor 3. The tear cord 6 is wound around the outer conductor 3 and passes through each annular groove 31 on the outer conductor 3. In this embodiment, the tear cord 6 is made of Kevlar fiber. Because the sheath layer 4 is attached to the surface of the outer conductor 3, and the surface of the outer conductor 3 has continuous annular grooves 31, it is particularly difficult to peel off the sheath layer 4. At the same time, by winding the tear cord 6 around the outer conductor 3, the sheath layer 4 can be broken open by the tear cord 6, thus making it easier to peel off the sheath layer 4.

[0026] Working principle: By setting an inorganic ceramic insulation layer 5 on the surface of the inner conductor 1, burrs and other defects on the surface of the inner conductor 1 can be covered. At the same time, the inorganic ceramic insulation layer 5 can improve the insulation effect and avoid the possibility of the insulation layer 2 being broken down due to large perforations in the foam layer. In addition, by controlling the thickness of the inorganic ceramic insulation layer 5, the insulation performance of products of various specifications can be ensured, and the high voltage resistance of the cable can be improved on this basis.

[0027] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-voltage withstand rating radio frequency coaxial cable, characterized in that, It includes an inner conductor (1), an insulating layer (2), an outer conductor (3), and a sheath layer (4) arranged sequentially from the inside out. The surface of the inner conductor (1) is provided with an inorganic ceramic insulating layer (5).

2. The high voltage withstand rating radio frequency coaxial cable according to claim 1, characterized in that, The inorganic ceramic insulating layer (5) is made of inorganic ceramic insulating varnish.

3. The high voltage withstand rating radio frequency coaxial cable according to claim 1, characterized in that, The thickness of the inorganic ceramic insulating layer (5) is 0.1-0.5 mm.

4. A high-voltage-resistance radio frequency coaxial cable according to claim 3, characterized in that, The inorganic ceramic insulating layer (5) has the insulation performance to withstand a voltage of 5000-100000V.

5. A high-voltage-resistance radio frequency coaxial cable as described in claim 1, characterized in that, The outer conductor (3) is an annular corrugated outer conductor (3) with an annular groove (31).

6. A high-voltage-resistance radio frequency coaxial cable as described in claim 5, characterized in that, The outer surface of the insulating layer (2) is attached to the inner surface of the outer conductor (3), and both are in the form of annular wrinkles.

7. A high-voltage-resistance radio frequency coaxial cable as described in claim 6, characterized in that, The inner surface of the sheath layer (4) and the outer surface of the outer conductor (3) are attached to each other, and both are in the form of annular wrinkles.

8. A high-voltage-resistance radio frequency coaxial cable as described in claim 7, characterized in that, A tear cord (6) is provided between the sheath layer (4) and the outer conductor (3).

9. A high-voltage-resistance radio frequency coaxial cable as described in claim 8, characterized in that, The tear cord (6) passes through each annular groove (31) on the outer conductor (3).

10. A high-voltage-resistance radio frequency coaxial cable as described in claim 9, characterized in that, The tear rope (6) is made of Kevlar fiber.

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