Leaky coaxial cable with high withstand voltage level

Abstract

The utility model relates to the technical field of leaky coaxial cables, in particular to a leaky coaxial cable with a high withstand voltage level, which comprises an inner conductor, an insulating layer, a longitudinal wrapping copper strip and a sheath which are sequentially arranged from inside to outside, and an inorganic ceramic insulating layer is arranged between the insulating layer and the longitudinal wrapping copper strip. According to the leaky coaxial cable with the high voltage withstanding grade, the inorganic ceramic insulating layer is arranged between the insulating layer and the longitudinally-wrapped copper strip, so that the longitudinally-wrapped copper strip can be separated from the insulating layer, damage to the insulating layer caused by burrs on the longitudinally-wrapped copper strip is avoided, and meanwhile, the inorganic ceramic insulating layer can improve the insulating effect; 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 insulation and high-voltage resistance of the cable is improved on the basis of the insulation and high-voltage resistance of the cable.

Description

TECHNICAL FIELD

[0001] The utility model relates to leaky coaxial cable technical field especially relates to a high pressure grade leaky coaxial cable. BACKGROUND

[0002] The insulating layer of leaky coaxial cable is generally formed by foaming, but due to the fact that large perforation is prone to occur in the foaming process of the insulating process of leaky coaxial cable, the insulating layer is prone to be punctured, resulting in current leakage or short circuit.

[0003] Meanwhile, the copper band is outside the insulating layer, and the surface of the copper band needs to be processed with a slot hole, resulting in the fact that the side of the copper band in contact with the insulating layer is prone to be not smooth, which may also cause the phenomenon of unqualified insulating pressure in the subsequent product detection process. SUMMARY

[0004] The utility model provides a high pressure grade leaky coaxial cable to solve the technical problems in the prior art.

[0005] The utility model adopts the technical scheme that a high pressure grade leaky coaxial cable, including the inside and outside setting of inner conductor, insulating layer, longitudinal copper band and sheath in proper order, is provided with inorganic ceramic insulating layer between the insulating layer and longitudinal copper band.

[0006] The high pressure grade leaky coaxial cable of the utility model can separate the longitudinal copper band and the insulating layer by setting the inorganic ceramic insulating layer between the insulating layer and the longitudinal copper band, avoid the damage of burrs on the longitudinal copper band to the insulating layer, and improve the insulating effect of the inorganic ceramic insulating layer, avoid the possibility of puncture of the insulating layer due to large perforation of the foaming layer, in addition, by controlling the thickness of the inorganic ceramic insulating layer, the insulating performance of each specification product can be ensured, and the insulating high pressure resistance of the cable is improved on this basis.

[0007] Further, the inorganic ceramic insulating layer adopts inorganic ceramic insulating paint.

[0008] Further, the thickness of the inorganic ceramic insulating layer is 0.1-0.5mm.

[0009] Further, the insulating performance of the inorganic ceramic insulating layer is capable of bearing 5000-100000V voltage.

[0010] Further, the inner conductor is a spiral corrugated inner conductor with spiral grooves on the surface.

[0011] Further, the inner surface of the insulating layer is spiral-shaped to be fitted with the outer surface of the inner conductor.

[0012] Further, the longitudinal copper band is provided with a plurality of slot holes arranged along the axial direction of the inner conductor.

[0013] Further, the length direction of the slot hole is arranged obliquely relative to the circumferential direction of the inner conductor.

[0014] Further, the foamed insulation layer is an insulation layer formed by polyethylene, nucleating agent and gas physical foaming, the polyethylene comprises high-density polyethylene and low-density polyethylene, and the weight percentage of the high-density polyethylene, the low-density polyethylene and the nucleating agent is 45% of high-density polyethylene, 51% of low-density polyethylene and 4% of nucleating agent respectively, and the foaming degree is 65-75%.

[0015] Further, the sheath is made of linear low-density polyethylene or low-smoke halogen-free flame-retardant polyolefin.

[0016] The utility model discloses the beneficial effect is,

[0017] By setting the inorganic ceramic insulation layer between the insulation layer and the longitudinal copper band, the longitudinal copper band and the insulation layer can be separated, the damage of the burr on the longitudinal copper band to the insulation layer is avoided, the inorganic ceramic insulation layer can improve the insulation effect, the possibility that the insulation layer is broken down due to the large perforation of the foaming layer is avoided, in addition, by controlling the thickness of the inorganic ceramic insulation layer, the insulation performance of various specifications of products can be ensured, and the insulation high-pressure resistance of the cable is improved on this basis. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model is further explained below in combination with the drawings and examples.

[0019] Figure 1 It is the partial cut structure schematic diagram of the whole of the leaky coaxial cable of the utility model reflecting a kind of high pressure grade.

[0020] Figure 2 It is the cross section schematic diagram of the leaky coaxial cable of the utility model reflecting high pressure grade.

[0021] In the drawing: 1, inner conductor;2, insulation layer;3, inorganic ceramic insulation layer;4, longitudinal copper band;41, slot hole;5, sheath. DETAILED DESCRIPTION

[0022] The utility model will be further explained in detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the utility model in a schematic manner, so it only shows the structure related to the utility model.

[0023] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more. In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] The utility model discloses a high voltage level's leak coaxial cable.

[0025] Refer to Figure 1 And Figure 2 A high voltage level's leak coaxial cable, including the inside and outside setting in proper order inner conductor 1, insulating layer 2, longitudinal copper band 4 and sheath 5, is equipped with inorganic ceramic insulating layer 3 between insulating layer 2 and longitudinal copper band 4. Through the inorganic ceramic insulating layer 3 between insulating layer 2 and longitudinal copper band 4 is equipped with, can separate longitudinal copper band 4 and insulating layer 2, avoid the burr on longitudinal copper band 4 to cause damage to insulating layer 2, simultaneously inorganic ceramic insulating layer 3 can promote the insulating effect, avoid the possibility that insulating layer 2 is broken down because of the big perforation of foaming layer, in addition, by controlling the thickness of inorganic ceramic insulating layer 3, can ensure the insulating performance of each specification product, and on this basis, the insulating high pressure resistance ability of cable is improved.

[0026] Specifically, the inorganic ceramic insulating layer 3 can use inorganic ceramic insulating paint. The thickness of the inorganic ceramic insulating layer 3 is 0.1-0.5mm, which can be 0.1mm or 0.5mm. In addition, the inorganic ceramic insulating layer 3 has an insulating performance of being able to withstand 5000-100000V voltage.

[0027] The inner conductor 1 is a spiral corrugated inner conductor 1 with spiral grooves on the surface. The inner surface of the insulating layer 2 is spirally shaped to fit the outer surface of the inner conductor 1. The longitudinal copper strip 4 is provided with slot holes 41, and the slot holes 41 are arranged in the axial direction of the inner conductor 1, and the length direction of the slot holes 41 is inclined relative to the circumferential direction of the inner conductor 1.

[0028] In addition, the foamed insulating layer 2 is an insulating layer 2 formed by polyethylene, a nucleating agent and gas physical foaming, the polyethylene includes high-density polyethylene and low-density polyethylene, and the weight percentage of the high-density polyethylene, the low-density polyethylene and the nucleating agent is 45% of the high-density polyethylene, 51% of the low-density polyethylene and 4% of the nucleating agent, and the foaming degree is 65-75%. The sheath 5 is made of linear low-density polyethylene or low-smoke halogen-free flame-retardant polyolefin.

[0029] Working principle: by setting the inorganic ceramic insulating layer 3 between the insulating layer 2 and the longitudinal copper strip 4, the longitudinal copper strip 4 can be separated from the insulating layer 2, so as to avoid damage to the insulating layer 2 caused by burrs on the longitudinal copper strip 4, and the inorganic ceramic insulating layer 3 can improve the insulation effect, avoid the possibility of the insulating layer 2 being punctured due to large perforation of the foaming layer, and further, by controlling the thickness of the inorganic ceramic insulating layer 3, the insulation performance of each specification product can be ensured, and the insulation high-voltage resistance of the cable is improved.

[0030] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. A high voltage grade leaky coaxial cable characterized by, It comprises an inner conductor (1), an insulation layer (2), a longitudinal copper tape (4) and a sheath (5) arranged in sequence from inside to outside, and an inorganic ceramic insulation layer (3) is arranged between the insulation layer (2) and the longitudinal copper tape (4).

2. A high voltage grade leaky coaxial cable according to claim 1, characterized in that, The inorganic ceramic insulation layer (3) is made of inorganic ceramic insulation paint.

3. A high voltage grade leaky coaxial cable according to claim 1, wherein The thickness of the inorganic ceramic insulation layer (3) is 0.1-0.5mm.

4. A high voltage grade leaky coaxial cable according to claim 3, wherein The inorganic ceramic insulation layer (3) can bear 5000-100000V voltage.

5. A high voltage grade leaky coaxial cable as recited in claim 1, wherein, The inner conductor (1) is a spiral corrugated inner conductor (1) with spiral grooves on the surface.

6. A high voltage grade leaky coaxial cable as defined in Claim 1, wherein, The inner surface of the insulation layer (2) is spiral-shaped to match the outer surface of the inner conductor (1).

7. A high voltage grade leaky coaxial cable as recited in claim 1, wherein, The longitudinal copper tape (4) is provided with slot holes (41) which are arranged in the axial direction of the inner conductor (1).

8. A high voltage grade leaky coaxial cable as defined in Claim 7, wherein, The length direction of the slot holes (41) is inclined to the circumferential direction of the inner conductor (1).

9. A high voltage grade leaky coaxial cable as recited in claim 1, wherein, The foamed insulation layer (2) is formed by polyethylene, nucleating agent and gas physical foaming, the polyethylene comprises high-density polyethylene and low-density polyethylene, the weight percentage of the high-density polyethylene, the low-density polyethylene and the nucleating agent is respectively 45% high-density polyethylene, 51% low-density polyethylene and 4% nucleating agent, and the foaming degree is 65-75%.

10. A high voltage grade leaky coaxial cable as recited in claim 1, wherein, The sheath (5) is made of linear low-density polyethylene or low-smoke halogen-free flame-retardant polyolefin.

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